/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:22:12,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:22:12,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:22:12,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:22:12,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:22:12,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:22:12,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:22:12,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:22:12,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:22:12,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:22:12,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:22:12,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:22:12,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:22:12,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:22:12,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:22:12,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:22:12,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:22:12,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:22:12,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:22:12,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:22:12,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:22:12,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:22:12,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:22:12,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:22:12,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:22:12,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:22:12,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:22:12,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:22:12,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:22:12,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:22:12,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:22:12,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:22:12,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:22:12,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:22:12,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:22:12,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:22:12,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:22:12,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:22:12,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:22:12,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:22:12,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:22:12,066 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 [2020-07-21 16:22:12,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:22:12,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:22:12,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:22:12,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:22:12,085 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:22:12,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:22:12,085 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:22:12,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:22:12,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:22:12,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:22:12,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:22:12,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:22:12,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:22:12,086 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:22:12,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:22:12,087 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:22:12,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:22:12,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:22:12,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:22:12,088 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:22:12,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:22:12,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:22:12,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:22:12,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:22:12,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:22:12,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:22:12,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:12,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:22:12,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:22:12,090 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 -> 2 [2020-07-21 16:22:12,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:22:12,438 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:22:12,442 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:22:12,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:22:12,447 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:22:12,448 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-07-21 16:22:12,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99b470e73/022c09dfbec64812bfd253de8fe91904/FLAG3bc3b3f87 [2020-07-21 16:22:13,090 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:22:13,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-07-21 16:22:13,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99b470e73/022c09dfbec64812bfd253de8fe91904/FLAG3bc3b3f87 [2020-07-21 16:22:13,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99b470e73/022c09dfbec64812bfd253de8fe91904 [2020-07-21 16:22:13,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:22:13,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:22:13,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:22:13,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:22:13,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:22:13,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:22:13" (1/1) ... [2020-07-21 16:22:13,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e7dff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:13, skipping insertion in model container [2020-07-21 16:22:13,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:22:13" (1/1) ... [2020-07-21 16:22:13,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:22:13,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:22:13,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:22:13,941 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:22:13,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:22:14,063 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:22:14,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14 WrapperNode [2020-07-21 16:22:14,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:22:14,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:22:14,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:22:14,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:22:14,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14" (1/1) ... [2020-07-21 16:22:14,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14" (1/1) ... [2020-07-21 16:22:14,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14" (1/1) ... [2020-07-21 16:22:14,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14" (1/1) ... [2020-07-21 16:22:14,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14" (1/1) ... [2020-07-21 16:22:14,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14" (1/1) ... [2020-07-21 16:22:14,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14" (1/1) ... [2020-07-21 16:22:14,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:22:14,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:22:14,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:22:14,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:22:14,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14" (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 [2020-07-21 16:22:14,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:22:14,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:22:14,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:22:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 16:22:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 16:22:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 16:22:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 16:22:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 16:22:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 16:22:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 16:22:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 16:22:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 16:22:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 16:22:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 16:22:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 16:22:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 16:22:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 16:22:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 16:22:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 16:22:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 16:22:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 16:22:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 16:22:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 16:22:14,220 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 16:22:14,220 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 16:22:14,220 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 16:22:14,220 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 16:22:14,220 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 16:22:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 16:22:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 16:22:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 16:22:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 16:22:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 16:22:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 16:22:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 16:22:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 16:22:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 16:22:14,222 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 16:22:14,223 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 16:22:14,223 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 16:22:14,223 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 16:22:14,223 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 16:22:14,223 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 16:22:14,224 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 16:22:14,224 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 16:22:14,224 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 16:22:14,224 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 16:22:14,224 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 16:22:14,224 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 16:22:14,225 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 16:22:14,225 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 16:22:14,225 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 16:22:14,225 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 16:22:14,225 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:22:14,225 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 16:22:14,226 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 16:22:14,226 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 16:22:14,226 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 16:22:14,226 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 16:22:14,226 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 16:22:14,226 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 16:22:14,227 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 16:22:14,227 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:22:14,227 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 16:22:14,227 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 16:22:14,227 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 16:22:14,227 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 16:22:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 16:22:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 16:22:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 16:22:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 16:22:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 16:22:14,228 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 16:22:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 16:22:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 16:22:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 16:22:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 16:22:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 16:22:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 16:22:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 16:22:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 16:22:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 16:22:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 16:22:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 16:22:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 16:22:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 16:22:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 16:22:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 16:22:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 16:22:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 16:22:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 16:22:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 16:22:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 16:22:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 16:22:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 16:22:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 16:22:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 16:22:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 16:22:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 16:22:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 16:22:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 16:22:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 16:22:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 16:22:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 16:22:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 16:22:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 16:22:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:22:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:22:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:22:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:22:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 16:22:14,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:22:14,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 16:22:14,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:22:14,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:22:14,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:22:14,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:22:14,914 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:22:14,915 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-21 16:22:14,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:22:14 BoogieIcfgContainer [2020-07-21 16:22:14,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:22:14,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:22:14,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:22:14,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:22:14,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:22:13" (1/3) ... [2020-07-21 16:22:14,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7101ef4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:22:14, skipping insertion in model container [2020-07-21 16:22:14,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:14" (2/3) ... [2020-07-21 16:22:14,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7101ef4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:22:14, skipping insertion in model container [2020-07-21 16:22:14,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:22:14" (3/3) ... [2020-07-21 16:22:14,940 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2020-07-21 16:22:14,952 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:22:14,960 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-21 16:22:14,976 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-21 16:22:15,005 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:22:15,005 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:22:15,005 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:22:15,005 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:22:15,006 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:22:15,006 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:22:15,006 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:22:15,006 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:22:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-21 16:22:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 16:22:15,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:15,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:15,038 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:15,046 INFO L82 PathProgramCache]: Analyzing trace with hash -810798801, now seen corresponding path program 1 times [2020-07-21 16:22:15,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:15,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719381201] [2020-07-21 16:22:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:22:15,285 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:15,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:15,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:22:15,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:15,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:15,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719381201] [2020-07-21 16:22:15,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:15,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:22:15,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817942508] [2020-07-21 16:22:15,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:22:15,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:22:15,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:22:15,397 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-07-21 16:22:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:15,529 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2020-07-21 16:22:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:22:15,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 16:22:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:15,541 INFO L225 Difference]: With dead ends: 67 [2020-07-21 16:22:15,542 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 16:22:15,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:22:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 16:22:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-07-21 16:22:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 16:22:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-21 16:22:15,592 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2020-07-21 16:22:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:15,592 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-21 16:22:15,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:22:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-21 16:22:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:22:15,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:15,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:15,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:15,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:15,810 INFO L82 PathProgramCache]: Analyzing trace with hash 59124385, now seen corresponding path program 1 times [2020-07-21 16:22:15,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:15,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28374009] [2020-07-21 16:22:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:22:15,916 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:15,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:22:15,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:15,996 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 [2020-07-21 16:22:15,997 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:16,001 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:16,002 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:16,002 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 16:22:16,038 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 [2020-07-21 16:22:16,039 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:16,042 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:16,042 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:16,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 16:22:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:16,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:16,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28374009] [2020-07-21 16:22:16,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:16,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:22:16,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448204200] [2020-07-21 16:22:16,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:22:16,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:22:16,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:22:16,056 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-21 16:22:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:16,217 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-21 16:22:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:22:16,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 16:22:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:16,219 INFO L225 Difference]: With dead ends: 51 [2020-07-21 16:22:16,220 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 16:22:16,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:22:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 16:22:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-07-21 16:22:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 16:22:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-21 16:22:16,230 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2020-07-21 16:22:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:16,230 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-21 16:22:16,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:22:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-21 16:22:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 16:22:16,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:16,232 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:16,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:16,446 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:16,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1951969173, now seen corresponding path program 1 times [2020-07-21 16:22:16,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:16,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962852025] [2020-07-21 16:22:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:22:16,577 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:16,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-21 16:22:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:16,613 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-07-21 16:22:16,614 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:16,630 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:16,642 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 [2020-07-21 16:22:16,642 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:16,654 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:16,655 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:16,655 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:24 [2020-07-21 16:22:16,745 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:16,745 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-21 16:22:16,747 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:16,888 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-07-21 16:22:16,890 INFO L624 ElimStorePlain]: treesize reduction 14, result has 88.9 percent of original size [2020-07-21 16:22:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:16,903 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:16,947 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:16,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:16,961 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-21 16:22:16,962 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:17,005 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,012 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:17,047 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,077 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,078 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2020-07-21 16:22:17,080 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:17,123 INFO L624 ElimStorePlain]: treesize reduction 20, result has 70.6 percent of original size [2020-07-21 16:22:17,126 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:17,127 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:114, output treesize:27 [2020-07-21 16:22:17,244 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,244 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-21 16:22:17,246 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:17,341 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,349 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_25|, |v_#memory_int_33|, |v_#memory_int_34|, |v_#memory_int_35|], 4=[|v_#memory_int_37|]} [2020-07-21 16:22:17,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:17,357 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:17,420 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,426 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:17,475 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,479 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:17,511 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,516 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:17,554 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 16:22:17,614 INFO L350 Elim1Store]: treesize reduction 59, result has 44.3 percent of original size [2020-07-21 16:22:17,615 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 75 [2020-07-21 16:22:17,616 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:17,676 INFO L624 ElimStorePlain]: treesize reduction 14, result has 83.9 percent of original size [2020-07-21 16:22:17,684 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 5 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:17,685 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:235, output treesize:43 [2020-07-21 16:22:17,821 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2020-07-21 16:22:17,822 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:17,830 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:17,831 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:17,832 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2020-07-21 16:22:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:17,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:22:17,897 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_25|, |v_#memory_int_33|, |v_#memory_int_35|], 3=[|v_#memory_int_34|]} [2020-07-21 16:22:17,905 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:18,099 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-07-21 16:22:18,100 INFO L624 ElimStorePlain]: treesize reduction 70, result has 53.0 percent of original size [2020-07-21 16:22:18,105 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:18,132 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:18,136 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:18,158 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:18,165 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:18,180 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:18,182 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:18,183 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:219, output treesize:58 [2020-07-21 16:22:18,311 INFO L440 ElimStorePlain]: Different costs {2=[|#memory_$Pointer$.base|, |v_#memory_int_31|, |v_#memory_int_32|], 7=[|v_#memory_int_39|]} [2020-07-21 16:22:18,320 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:18,765 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-07-21 16:22:18,766 INFO L624 ElimStorePlain]: treesize reduction 110, result has 52.0 percent of original size [2020-07-21 16:22:18,773 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:18,816 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:18,821 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:18,851 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:18,854 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:18,889 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:18,892 INFO L544 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-2 vars, End of recursive call: 11 dim-0 vars, and 1 xjuncts. [2020-07-21 16:22:18,893 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:329, output treesize:115 [2020-07-21 16:22:23,130 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:23,131 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2020-07-21 16:22:23,132 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:23,139 INFO L624 ElimStorePlain]: treesize reduction 121, result has 0.8 percent of original size [2020-07-21 16:22:23,140 INFO L512 ElimStorePlain]: Eliminatee |v_#memory_int_30| vanished before elimination [2020-07-21 16:22:23,141 INFO L544 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:23,141 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 15 variables, input treesize:134, output treesize:1 [2020-07-21 16:22:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:23,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962852025] [2020-07-21 16:22:23,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:22:23,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-21 16:22:23,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076711399] [2020-07-21 16:22:23,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 16:22:23,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:23,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 16:22:23,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2020-07-21 16:22:23,150 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 11 states. [2020-07-21 16:22:25,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:25,863 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-07-21 16:22:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:22:25,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-07-21 16:22:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:25,866 INFO L225 Difference]: With dead ends: 64 [2020-07-21 16:22:25,866 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 16:22:25,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2020-07-21 16:22:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 16:22:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 23. [2020-07-21 16:22:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 16:22:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-21 16:22:25,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-07-21 16:22:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:25,878 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-21 16:22:25,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 16:22:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-21 16:22:25,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 16:22:25,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:25,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:26,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:26,084 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash -506610811, now seen corresponding path program 1 times [2020-07-21 16:22:26,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:26,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072466946] [2020-07-21 16:22:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:22:26,178 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:26,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:26,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:22:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:26,212 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 [2020-07-21 16:22:26,213 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:22:26,217 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:22:26,218 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:22:26,218 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 16:22:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:22:26,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:26,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072466946] [2020-07-21 16:22:26,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:26,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:22:26,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90097429] [2020-07-21 16:22:26,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:22:26,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:26,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:22:26,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:22:26,236 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-07-21 16:22:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:26,374 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-21 16:22:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:22:26,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 16:22:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:26,377 INFO L225 Difference]: With dead ends: 39 [2020-07-21 16:22:26,377 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 16:22:26,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:22:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 16:22:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-07-21 16:22:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 16:22:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-21 16:22:26,387 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-07-21 16:22:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:26,387 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-21 16:22:26,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:22:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-21 16:22:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 16:22:26,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:26,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:26,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:26,602 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:22:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash -506551229, now seen corresponding path program 1 times [2020-07-21 16:22:26,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:26,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913928428] [2020-07-21 16:22:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:26,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:22:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:22:26,706 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:22:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:22:26,720 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:22:26,750 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:22:26,750 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:22:26,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:27,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:22:27 BoogieIcfgContainer [2020-07-21 16:22:27,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:22:27,006 INFO L168 Benchmark]: Toolchain (without parser) took 13629.38 ms. Allocated memory was 137.9 MB in the beginning and 278.4 MB in the end (delta: 140.5 MB). Free memory was 101.4 MB in the beginning and 241.3 MB in the end (delta: -139.9 MB). Peak memory consumption was 649.4 kB. Max. memory is 7.1 GB. [2020-07-21 16:22:27,007 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:22:27,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.99 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 101.0 MB in the beginning and 169.9 MB in the end (delta: -68.9 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:27,009 INFO L168 Benchmark]: Boogie Preprocessor took 70.89 ms. Allocated memory is still 202.4 MB. Free memory was 169.9 MB in the beginning and 167.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:27,009 INFO L168 Benchmark]: RCFGBuilder took 790.91 ms. Allocated memory is still 202.4 MB. Free memory was 167.1 MB in the beginning and 120.0 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:27,010 INFO L168 Benchmark]: TraceAbstraction took 12074.67 ms. Allocated memory was 202.4 MB in the beginning and 278.4 MB in the end (delta: 76.0 MB). Free memory was 119.3 MB in the beginning and 241.3 MB in the end (delta: -121.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:22:27,014 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 682.99 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 101.0 MB in the beginning and 169.9 MB in the end (delta: -68.9 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.89 ms. Allocated memory is still 202.4 MB. Free memory was 169.9 MB in the beginning and 167.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 790.91 ms. Allocated memory is still 202.4 MB. Free memory was 167.1 MB in the beginning and 120.0 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12074.67 ms. Allocated memory was 202.4 MB in the beginning and 278.4 MB in the end (delta: 76.0 MB). Free memory was 119.3 MB in the beginning and 241.3 MB in the end (delta: -121.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1040]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* list = malloc(sizeof(SLL)); [L995] list->next = ((void*)0) [L996] list->prev = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; VAL [end={8366:0}, list={8366:0}, malloc(sizeof(SLL))={8366:0}] [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end = ((void*)0) [L1026] end = list VAL [end={8366:0}, list={8366:0}, malloc(sizeof(SLL))={8366:0}] [L1029] COND FALSE !(!(((void*)0) != end)) VAL [end={8366:0}, list={8366:0}, malloc(sizeof(SLL))={8366:0}] [L1030] EXPR end->colour VAL [end={8366:0}, end->colour=1, list={8366:0}, malloc(sizeof(SLL))={8366:0}] [L1030] COND FALSE !(!(BLACK == end->colour)) [L1032] COND TRUE ((void*)0) != end [L1034] EXPR end->colour VAL [end={8366:0}, end->colour=1, list={8366:0}, malloc(sizeof(SLL))={8366:0}] [L1034] COND FALSE !(RED == end->colour) [L1040] EXPR end->next VAL [end={8366:0}, end->next={0:0}, list={8366:0}, malloc(sizeof(SLL))={8366:0}] [L1040] COND TRUE !(end->next) [L1040] __VERIFIER_error() VAL [end={8366:0}, list={8366:0}, malloc(sizeof(SLL))={8366:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.9s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 111 SDtfs, 148 SDslu, 275 SDs, 0 SdLazy, 213 SolverSat, 50 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 70 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 79 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 72 ConstructedInterpolants, 9 QuantifiedInterpolants, 13101 SizeOfPredicates, 25 NumberOfNonLiveVariables, 241 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 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...