/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/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:17:06,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:17:06,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:17:06,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:17:06,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:17:06,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:17:06,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:17:06,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:17:06,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:17:06,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:17:06,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:17:06,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:17:06,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:17:06,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:17:06,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:17:06,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:17:06,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:17:06,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:17:06,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:17:06,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:17:06,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:17:06,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:17:06,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:17:06,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:17:06,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:17:06,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:17:06,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:17:06,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:17:06,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:17:06,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:17:06,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:17:06,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:17:06,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:17:06,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:17:06,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:17:06,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:17:06,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:17:06,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:17:06,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:17:06,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:17:06,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:17:06,193 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 17:17:06,209 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:17:06,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:17:06,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:17:06,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:17:06,211 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:17:06,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:17:06,211 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:17:06,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:17:06,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:17:06,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:17:06,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:17:06,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:17:06,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:17:06,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:17:06,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:17:06,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:17:06,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:17:06,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:17:06,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:17:06,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:17:06,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:17:06,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:17:06,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:17:06,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:17:06,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:17:06,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:17:06,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:06,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:17:06,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:17:06,215 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 17:17:06,497 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:17:06,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:17:06,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:17:06,515 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:17:06,516 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:17:06,517 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-07-20 17:17:06,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92784fe5/0d7b6b0467be41aa86cebed5ee945c0a/FLAG6cc74ea2b [2020-07-20 17:17:07,170 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:17:07,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-07-20 17:17:07,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92784fe5/0d7b6b0467be41aa86cebed5ee945c0a/FLAG6cc74ea2b [2020-07-20 17:17:07,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92784fe5/0d7b6b0467be41aa86cebed5ee945c0a [2020-07-20 17:17:07,453 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:17:07,456 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:17:07,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:17:07,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:17:07,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:17:07,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:17:07" (1/1) ... [2020-07-20 17:17:07,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f8717a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:07, skipping insertion in model container [2020-07-20 17:17:07,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:17:07" (1/1) ... [2020-07-20 17:17:07,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:17:07,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:17:07,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:17:08,008 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:17:08,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:17:08,108 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:17:08,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08 WrapperNode [2020-07-20 17:17:08,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:17:08,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:17:08,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:17:08,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:17:08,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (1/1) ... [2020-07-20 17:17:08,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:17:08,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:17:08,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:17:08,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:17:08,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (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 17:17:08,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:17:08,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:17:08,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:17:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 17:17:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 17:17:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 17:17:08,247 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 17:17:08,247 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 17:17:08,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 17:17:08,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 17:17:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 17:17:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 17:17:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 17:17:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 17:17:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 17:17:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 17:17:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 17:17:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 17:17:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 17:17:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 17:17:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 17:17:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 17:17:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 17:17:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 17:17:08,251 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 17:17:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 17:17:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 17:17:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 17:17:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 17:17:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 17:17:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 17:17:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 17:17:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 17:17:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 17:17:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 17:17:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 17:17:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 17:17:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 17:17:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 17:17:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 17:17:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 17:17:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 17:17:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 17:17:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 17:17:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 17:17:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 17:17:08,256 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 17:17:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 17:17:08,257 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 17:17:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 17:17:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 17:17:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 17:17:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 17:17:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:17:08,258 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:17:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:17:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:17:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:17:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 17:17:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:17:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 17:17:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 17:17:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:17:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 17:17:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 17:17:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 17:17:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:17:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 17:17:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 17:17:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 17:17:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 17:17:08,262 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 17:17:08,263 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 17:17:08,263 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 17:17:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 17:17:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 17:17:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 17:17:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 17:17:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 17:17:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 17:17:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 17:17:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 17:17:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 17:17:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 17:17:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 17:17:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 17:17:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 17:17:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 17:17:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 17:17:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 17:17:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 17:17:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 17:17:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 17:17:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 17:17:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 17:17:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 17:17:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 17:17:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 17:17:08,268 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 17:17:08,268 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 17:17:08,268 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 17:17:08,268 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 17:17:08,268 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 17:17:08,268 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 17:17:08,268 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 17:17:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 17:17:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:17:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:17:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:17:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:17:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:17:08,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:17:08,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:17:08,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:17:08,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:17:08,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:17:08,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:17:08,853 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:17:08,853 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-20 17:17:08,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:17:08 BoogieIcfgContainer [2020-07-20 17:17:08,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:17:08,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:17:08,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:17:08,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:17:08,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:17:07" (1/3) ... [2020-07-20 17:17:08,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@858d4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:17:08, skipping insertion in model container [2020-07-20 17:17:08,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:17:08" (2/3) ... [2020-07-20 17:17:08,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@858d4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:17:08, skipping insertion in model container [2020-07-20 17:17:08,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:17:08" (3/3) ... [2020-07-20 17:17:08,869 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-07-20 17:17:08,881 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:17:08,891 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-07-20 17:17:08,907 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-07-20 17:17:08,935 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:17:08,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:17:08,935 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:17:08,935 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:17:08,936 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:17:08,936 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:17:08,936 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:17:08,936 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:17:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-20 17:17:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:17:08,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:08,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:08,965 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:08,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:08,971 INFO L82 PathProgramCache]: Analyzing trace with hash -742552803, now seen corresponding path program 1 times [2020-07-20 17:17:08,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:08,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070345378] [2020-07-20 17:17:08,981 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 17:17:09,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:09,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:09,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 17:17:09,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:09,307 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2020-07-20 17:17:09,310 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:09,330 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:09,331 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:09,331 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2020-07-20 17:17:09,346 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 17:17:09,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:09,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070345378] [2020-07-20 17:17:09,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:09,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:17:09,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037973532] [2020-07-20 17:17:09,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:17:09,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:17:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:17:09,378 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-07-20 17:17:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:09,519 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2020-07-20 17:17:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:17:09,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-20 17:17:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:09,529 INFO L225 Difference]: With dead ends: 73 [2020-07-20 17:17:09,529 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 17:17:09,533 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 [2020-07-20 17:17:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 17:17:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-07-20 17:17:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 17:17:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 17:17:09,574 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 10 [2020-07-20 17:17:09,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:09,575 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 17:17:09,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:17:09,575 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 17:17:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:17:09,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:09,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:09,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:09,794 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1973625457, now seen corresponding path program 1 times [2020-07-20 17:17:09,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:09,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530251603] [2020-07-20 17:17:09,796 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 17:17:09,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:09,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:09,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:17:09,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:09,926 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 17:17:09,927 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:09,930 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:09,930 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:09,931 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 17:17:09,961 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 17:17:09,962 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:09,965 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:09,965 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 17:17:09,966 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 17:17:09,973 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 17:17:09,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:09,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530251603] [2020-07-20 17:17:09,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:09,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:17:09,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194400427] [2020-07-20 17:17:09,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:17:09,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:09,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:17:09,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:09,977 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-07-20 17:17:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:10,122 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-07-20 17:17:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:17:10,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 17:17:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:10,124 INFO L225 Difference]: With dead ends: 54 [2020-07-20 17:17:10,124 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 17:17:10,125 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 [2020-07-20 17:17:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 17:17:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-07-20 17:17:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 17:17:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-20 17:17:10,135 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 14 [2020-07-20 17:17:10,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:10,135 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-20 17:17:10,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:17:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-20 17:17:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 17:17:10,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:10,136 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:10,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:10,350 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:10,351 INFO L82 PathProgramCache]: Analyzing trace with hash -954667545, now seen corresponding path program 1 times [2020-07-20 17:17:10,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:10,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746383859] [2020-07-20 17:17:10,352 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 17:17:10,625 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:10,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:10,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 17:17:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:10,662 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-20 17:17:10,663 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-07-20 17:17:10,663 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,684 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,690 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 17:17:10,690 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,704 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,705 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:10,706 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:29 [2020-07-20 17:17:10,772 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,773 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 [2020-07-20 17:17:10,774 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,838 INFO L624 ElimStorePlain]: treesize reduction 14, result has 81.1 percent of original size [2020-07-20 17:17:10,847 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:10,871 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:10,883 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 41 treesize of output 20 [2020-07-20 17:17:10,885 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,932 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,933 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,934 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:27 [2020-07-20 17:17:11,007 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,008 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 [2020-07-20 17:17:11,010 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,038 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,040 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_30|, |v_#memory_int_31|], 4=[|v_#memory_int_33|]} [2020-07-20 17:17:11,044 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,065 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,069 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,089 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:11,114 INFO L350 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2020-07-20 17:17:11,115 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 2 case distinctions, treesize of input 52 treesize of output 45 [2020-07-20 17:17:11,116 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,134 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,139 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,139 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:80, output treesize:43 [2020-07-20 17:17:11,229 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 [2020-07-20 17:17:11,230 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,238 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,239 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,239 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2020-07-20 17:17:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:11,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:17:11,294 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_31|], 3=[|v_#memory_int_30|]} [2020-07-20 17:17:11,297 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,318 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,321 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,333 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,334 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,335 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:55 [2020-07-20 17:17:11,385 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_29|], 6=[|v_#memory_int_35|]} [2020-07-20 17:17:11,390 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,414 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,418 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,442 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,444 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,445 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:96, output treesize:102 [2020-07-20 17:17:13,572 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:13,573 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 28 treesize of output 32 [2020-07-20 17:17:13,574 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,576 INFO L624 ElimStorePlain]: treesize reduction 114, result has 0.9 percent of original size [2020-07-20 17:17:13,578 INFO L512 ElimStorePlain]: Eliminatee |v_#memory_int_28| vanished before elimination [2020-07-20 17:17:13,579 INFO L544 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 13 variables, input treesize:127, output treesize:1 [2020-07-20 17:17:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:13,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746383859] [2020-07-20 17:17:13,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:17:13,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 17:17:13,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312600115] [2020-07-20 17:17:13,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 17:17:13,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:13,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 17:17:13,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2020-07-20 17:17:13,594 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 11 states. [2020-07-20 17:17:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:18,274 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-07-20 17:17:18,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:17:18,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-07-20 17:17:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:18,278 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:17:18,279 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 17:17:18,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2020-07-20 17:17:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 17:17:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 27. [2020-07-20 17:17:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 17:17:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-20 17:17:18,298 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-20 17:17:18,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:18,298 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-20 17:17:18,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 17:17:18,299 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-20 17:17:18,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 17:17:18,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:18,300 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 17:17:18,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:18,514 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:18,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:18,515 INFO L82 PathProgramCache]: Analyzing trace with hash 903516662, now seen corresponding path program 1 times [2020-07-20 17:17:18,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:18,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721826097] [2020-07-20 17:17:18,516 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:18,602 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 17:17:18,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:17:18,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:18,611 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 17:17:18,611 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:18,614 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:18,614 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:18,614 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 17:17:18,631 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 17:17:18,632 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:18,634 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:18,635 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 17:17:18,635 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 17:17:18,644 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 17:17:18,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:18,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721826097] [2020-07-20 17:17:18,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:18,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:17:18,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392920331] [2020-07-20 17:17:18,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:17:18,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:18,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:17:18,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:18,646 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-07-20 17:17:18,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:18,737 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-07-20 17:17:18,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:17:18,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-20 17:17:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:18,739 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:17:18,739 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 17:17:18,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:17:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 17:17:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-07-20 17:17:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 17:17:18,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-07-20 17:17:18,747 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 18 [2020-07-20 17:17:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:18,747 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-07-20 17:17:18,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:17:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-07-20 17:17:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:17:18,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:18,749 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] [2020-07-20 17:17:18,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:18,950 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1223911862, now seen corresponding path program 1 times [2020-07-20 17:17:18,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:18,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154834405] [2020-07-20 17:17:18,952 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 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 [2020-07-20 17:17:19,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:19,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:19,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 17:17:19,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:19,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:19,142 INFO L350 Elim1Store]: treesize reduction 33, result has 55.4 percent of original size [2020-07-20 17:17:19,143 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2020-07-20 17:17:19,143 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,203 INFO L624 ElimStorePlain]: treesize reduction 16, result has 81.4 percent of original size [2020-07-20 17:17:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:19,264 INFO L350 Elim1Store]: treesize reduction 33, result has 55.4 percent of original size [2020-07-20 17:17:19,264 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2020-07-20 17:17:19,265 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,336 INFO L624 ElimStorePlain]: treesize reduction 16, result has 79.7 percent of original size [2020-07-20 17:17:19,337 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,337 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2020-07-20 17:17:19,418 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 17:17:19,421 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 17:17:19,430 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 17:17:19,430 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,435 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 17:17:19,436 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,446 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:19,447 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 [2020-07-20 17:17:19,448 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,510 INFO L624 ElimStorePlain]: treesize reduction 12, result has 84.6 percent of original size [2020-07-20 17:17:19,513 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 17:17:19,514 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,516 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 17:17:19,517 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,526 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:19,527 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 [2020-07-20 17:17:19,528 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,544 INFO L624 ElimStorePlain]: treesize reduction 20, result has 25.9 percent of original size [2020-07-20 17:17:19,544 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:19,544 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:110, output treesize:7 [2020-07-20 17:17:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:19,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:17:19,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:17:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:19,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154834405] [2020-07-20 17:17:19,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:17:19,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-20 17:17:19,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257771458] [2020-07-20 17:17:19,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:17:19,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:17:19,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:17:19,618 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-07-20 17:17:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:19,851 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-07-20 17:17:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:17:19,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-07-20 17:17:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:19,853 INFO L225 Difference]: With dead ends: 51 [2020-07-20 17:17:19,853 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 17:17:19,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:17:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 17:17:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 17:17:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 17:17:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 17:17:19,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-20 17:17:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:19,860 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 17:17:19,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:17:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 17:17:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:17:19,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:19,861 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] [2020-07-20 17:17:20,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:20,074 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:20,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1696156082, now seen corresponding path program 1 times [2020-07-20 17:17:20,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:20,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291460397] [2020-07-20 17:17:20,076 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:20,291 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:20,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:20,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:17:20,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:20,320 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 17:17:20,321 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:20,323 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:20,323 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 17:17:20,323 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 17:17:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 17:17:20,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:20,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291460397] [2020-07-20 17:17:20,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:20,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:17:20,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244505042] [2020-07-20 17:17:20,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:17:20,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:20,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:17:20,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:20,333 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-07-20 17:17:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:20,411 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-07-20 17:17:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:17:20,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 17:17:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:20,413 INFO L225 Difference]: With dead ends: 44 [2020-07-20 17:17:20,413 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 17:17:20,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:17:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 17:17:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-20 17:17:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 17:17:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-07-20 17:17:20,420 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2020-07-20 17:17:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:20,420 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-07-20 17:17:20,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:17:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-07-20 17:17:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:17:20,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:20,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:20,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:20,634 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:20,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476830, now seen corresponding path program 1 times [2020-07-20 17:17:20,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:20,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055401259] [2020-07-20 17:17:20,636 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:20,869 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:20,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:20,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-20 17:17:20,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:20,896 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-07-20 17:17:20,897 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 17:17:20,897 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:20,908 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:20,909 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:20,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:24 [2020-07-20 17:17:20,963 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:20,963 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 69 [2020-07-20 17:17:20,965 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:21,033 INFO L624 ElimStorePlain]: treesize reduction 28, result has 75.2 percent of original size [2020-07-20 17:17:21,041 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-20 17:17:21,042 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:21,065 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:21,071 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-20 17:17:21,072 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:21,100 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:21,100 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:21,101 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:59 [2020-07-20 17:17:21,220 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:21,221 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2020-07-20 17:17:21,222 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:21,293 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:21,299 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:21,354 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:21,357 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:21,398 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:21,593 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-07-20 17:17:21,594 INFO L350 Elim1Store]: treesize reduction 254, result has 40.9 percent of original size [2020-07-20 17:17:21,595 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 269 [2020-07-20 17:17:21,598 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[11, 3, 2, 1] term [2020-07-20 17:17:21,599 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 11 disjuncts [2020-07-20 17:17:21,600 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:21,696 INFO L624 ElimStorePlain]: treesize reduction 144, result has 54.3 percent of original size [2020-07-20 17:17:21,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:21,723 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:21,723 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 92 [2020-07-20 17:17:21,725 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:21,787 INFO L624 ElimStorePlain]: treesize reduction 46, result has 71.4 percent of original size [2020-07-20 17:17:21,789 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:21,789 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:277, output treesize:126 [2020-07-20 17:17:21,905 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:21,905 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 107 [2020-07-20 17:17:21,907 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:21,938 INFO L624 ElimStorePlain]: treesize reduction 20, result has 80.6 percent of original size [2020-07-20 17:17:21,940 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:21,940 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:140, output treesize:83 [2020-07-20 17:17:21,993 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:21,994 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 69 [2020-07-20 17:17:21,996 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-20 17:17:21,996 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-20 17:17:21,997 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-20 17:17:21,998 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:22,013 INFO L624 ElimStorePlain]: treesize reduction 23, result has 36.1 percent of original size [2020-07-20 17:17:22,014 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:22,014 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:87, output treesize:4 [2020-07-20 17:17:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:22,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:17:22,097 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_32|], 6=[|v_#memory_$Pointer$.offset_29|, |v_#memory_$Pointer$.base_29|, |v_#memory_$Pointer$.base_32|]} [2020-07-20 17:17:22,101 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:22,142 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:22,148 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:22,179 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:22,182 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:22,204 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:22,207 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:22,221 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:22,223 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:22,223 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:140 [2020-07-20 17:17:22,302 INFO L440 ElimStorePlain]: Different costs {6=[|#memory_$Pointer$.offset|], 14=[|#memory_$Pointer$.base|]} [2020-07-20 17:17:22,323 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 762678 treesize of output 762422 [2020-07-20 17:17:22,448 INFO L544 ElimStorePlain]: Start of recursive call 2: 64 dim-0 vars, End of recursive call: 64 dim-0 vars, and 2 xjuncts. [2020-07-20 17:17:30,601 WARN L193 SmtUtils]: Spent 8.15 s on a formula simplification. DAG size of input: 1239 DAG size of output: 104 [2020-07-20 17:17:30,602 INFO L624 ElimStorePlain]: treesize reduction 761135, result has 0.2 percent of original size [2020-07-20 17:17:30,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:30,651 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:17:30,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:30,655 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:17:30,669 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 87594 treesize of output 87338 [2020-07-20 17:17:30,690 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-07-20 17:17:30,843 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:17:30,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:30,847 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:17:30,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:30,905 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 89172490 treesize of output 88910346 [2020-07-20 17:17:31,593 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2020-07-20 17:17:32,020 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:17:32,067 INFO L244 Elim1Store]: Index analysis took 131 ms [2020-07-20 17:17:32,263 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 17:17:32,264 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:32,277 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 784767841 treesize of output 782142488 [2020-07-20 17:17:34,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055401259] [2020-07-20 17:17:34,940 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2020-07-20 17:17:34,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:34,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-20 17:17:34,940 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-20 17:17:34,940 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:17:35,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:35,162 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-20 17:17:35,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:17:35 BoogieIcfgContainer [2020-07-20 17:17:35,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:17:35,164 INFO L168 Benchmark]: Toolchain (without parser) took 27709.33 ms. Allocated memory was 138.9 MB in the beginning and 749.2 MB in the end (delta: 610.3 MB). Free memory was 102.5 MB in the beginning and 402.7 MB in the end (delta: -300.3 MB). Peak memory consumption was 536.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:17:35,164 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 17:17:35,165 INFO L168 Benchmark]: CACSL2BoogieTranslator took 652.10 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 170.1 MB in the end (delta: -68.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:17:35,165 INFO L168 Benchmark]: Boogie Preprocessor took 70.73 ms. Allocated memory is still 202.9 MB. Free memory was 170.1 MB in the beginning and 167.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:17:35,166 INFO L168 Benchmark]: RCFGBuilder took 677.10 ms. Allocated memory is still 202.9 MB. Free memory was 166.8 MB in the beginning and 120.5 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:17:35,166 INFO L168 Benchmark]: TraceAbstraction took 26303.10 ms. Allocated memory was 202.9 MB in the beginning and 749.2 MB in the end (delta: 546.3 MB). Free memory was 119.9 MB in the beginning and 402.7 MB in the end (delta: -282.9 MB). Peak memory consumption was 489.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:17:35,168 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 652.10 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 170.1 MB in the end (delta: -68.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.73 ms. Allocated memory is still 202.9 MB. Free memory was 170.1 MB in the beginning and 167.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 677.10 ms. Allocated memory is still 202.9 MB. Free memory was 166.8 MB in the beginning and 120.5 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26303.10 ms. Allocated memory was 202.9 MB in the beginning and 749.2 MB in the end (delta: 546.3 MB). Free memory was 119.9 MB in the beginning and 402.7 MB in the end (delta: -282.9 MB). Peak memory consumption was 489.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1038]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L994] SLL* null = malloc(sizeof(SLL)); [L995] null->colour = BLACK [L996] null->next = ((void*)0) [L998] SLL* list = malloc(sizeof(SLL)); [L999] list->next = null [L1000] list->colour = BLACK [L1002] SLL* end = list; [L1005] COND TRUE __VERIFIER_nondet_int() [L1008] end->next = malloc(sizeof(SLL)) [L1009] EXPR end->next [L1009] end = end->next [L1010] end->next = null [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1018] end->colour = RED [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1022] end->colour = BLACK [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND FALSE !(!(BLACK == end->colour)) [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND FALSE !(RED == end->colour) [L1042] EXPR end->next [L1042] end = end->next [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND TRUE RED == end->colour [L1037] EXPR end->next [L1037] end = end->next [L1038] COND TRUE !(null != end) [L1038] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 26.2s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 179 SDslu, 423 SDs, 0 SdLazy, 326 SolverSat, 67 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, 6 MinimizatonAttempts, 69 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 101 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 131 ConstructedInterpolants, 9 QuantifiedInterpolants, 32072 SizeOfPredicates, 39 NumberOfNonLiveVariables, 462 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 4/10 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...