/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:31:24,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:31:24,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:31:24,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:31:24,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:31:24,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:31:24,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:31:24,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:31:24,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:31:24,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:31:24,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:31:24,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:31:24,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:31:24,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:31:24,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:31:24,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:31:24,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:31:24,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:31:24,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:31:24,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:31:24,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:31:24,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:31:24,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:31:24,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:31:24,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:31:24,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:31:24,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:31:24,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:31:24,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:31:24,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:31:24,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:31:24,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:31:24,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:31:24,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:31:24,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:31:24,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:31:24,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:31:24,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:31:24,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:31:24,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:31:24,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:31:24,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:31:24,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:31:24,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:31:24,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:31:24,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:31:24,372 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:31:24,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:31:24,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:31:24,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:31:24,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:31:24,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:31:24,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:31:24,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:31:24,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:31:24,374 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:31:24,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:31:24,374 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:31:24,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:31:24,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:31:24,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:31:24,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:31:24,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:31:24,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:24,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:31:24,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:31:24,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:31:24,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:31:24,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:24,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:31:24,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:31:24,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:31:24,770 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:31:24,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:31:24,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:31:24,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:31:24,815 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:31:24,817 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-07-20 11:31:24,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d419c0ff/e5e78a08d2b04d1b92d672bfa4cf51f4/FLAG1771e52f3 [2020-07-20 11:31:25,700 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:31:25,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-07-20 11:31:25,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d419c0ff/e5e78a08d2b04d1b92d672bfa4cf51f4/FLAG1771e52f3 [2020-07-20 11:31:25,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d419c0ff/e5e78a08d2b04d1b92d672bfa4cf51f4 [2020-07-20 11:31:25,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:31:25,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:31:25,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:25,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:31:25,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:31:25,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:25" (1/1) ... [2020-07-20 11:31:25,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e755a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:25, skipping insertion in model container [2020-07-20 11:31:25,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:25" (1/1) ... [2020-07-20 11:31:26,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:31:26,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:31:26,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:26,715 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:31:26,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:26,878 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:31:26,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26 WrapperNode [2020-07-20 11:31:26,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:26,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:31:26,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:31:26,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:31:26,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... [2020-07-20 11:31:26,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:31:26,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:31:26,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:31:26,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:31:26,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:27,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:31:27,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:31:27,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:31:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:31:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:31:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:31:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:31:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:31:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:31:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:31:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:31:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:31:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:31:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:31:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:31:27,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:31:27,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:31:27,087 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:31:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:31:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:31:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:31:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:31:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:31:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:31:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:31:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:31:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:31:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:31:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:31:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:31:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:31:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:31:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:31:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:31:27,091 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:31:27,091 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:31:27,091 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:31:27,091 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:31:27,091 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:31:27,092 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:31:27,092 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:31:27,092 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:31:27,092 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:31:27,092 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:31:27,092 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:31:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:31:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:31:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:31:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:31:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:31:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:31:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:31:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:31:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:31:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:31:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:31:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:31:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:31:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:31:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:31:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:31:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:31:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:31:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:31:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:31:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:31:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:31:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:31:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:31:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:31:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:31:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:31:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:31:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:31:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:31:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:31:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:31:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:31:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:31:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:31:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:31:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:31:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:31:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:31:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:31:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:31:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:31:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:31:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:31:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:31:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:31:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:31:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:31:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:31:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:31:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:31:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:31:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:31:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:31:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:31:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:31:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:31:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:31:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:31:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:31:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:31:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:31:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:31:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:31:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:31:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:31:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:31:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:31:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:31:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:31:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:31:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:31:27,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:31:27,892 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-20 11:31:27,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:27 BoogieIcfgContainer [2020-07-20 11:31:27,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:31:27,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:31:27,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:31:27,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:31:27,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:31:25" (1/3) ... [2020-07-20 11:31:27,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20807bbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:27, skipping insertion in model container [2020-07-20 11:31:27,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:26" (2/3) ... [2020-07-20 11:31:27,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20807bbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:27, skipping insertion in model container [2020-07-20 11:31:27,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:27" (3/3) ... [2020-07-20 11:31:27,914 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2020-07-20 11:31:27,931 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:31:27,945 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-20 11:31:27,966 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-20 11:31:27,999 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:31:28,000 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:31:28,000 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:31:28,000 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:31:28,000 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:31:28,001 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:31:28,001 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:31:28,001 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:31:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 11:31:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:31:28,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:28,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:28,032 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:28,039 INFO L82 PathProgramCache]: Analyzing trace with hash -810798801, now seen corresponding path program 1 times [2020-07-20 11:31:28,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:28,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030839577] [2020-07-20 11:31:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:28,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:31:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:28,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:28,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030839577] [2020-07-20 11:31:28,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:28,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:31:28,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842165140] [2020-07-20 11:31:28,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:31:28,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:28,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:31:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:28,349 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-20 11:31:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:28,385 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2020-07-20 11:31:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:31:28,408 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 11:31:28,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:28,422 INFO L225 Difference]: With dead ends: 59 [2020-07-20 11:31:28,422 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 11:31:28,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 11:31:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 11:31:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 11:31:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-20 11:31:28,486 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-07-20 11:31:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:28,487 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-20 11:31:28,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:31:28,487 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-20 11:31:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:31:28,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:28,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:28,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:28,698 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:28,699 INFO L82 PathProgramCache]: Analyzing trace with hash 622671912, now seen corresponding path program 1 times [2020-07-20 11:31:28,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:28,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242214526] [2020-07-20 11:31:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:31:28,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:28,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:28,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242214526] [2020-07-20 11:31:28,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:28,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:28,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114598488] [2020-07-20 11:31:28,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:28,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:28,877 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-07-20 11:31:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:28,994 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-07-20 11:31:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:31:28,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-20 11:31:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:28,997 INFO L225 Difference]: With dead ends: 35 [2020-07-20 11:31:28,998 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:31:29,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 11:31:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:31:29,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-07-20 11:31:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 11:31:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 11:31:29,007 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2020-07-20 11:31:29,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:29,007 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 11:31:29,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:29,008 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 11:31:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:31:29,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:29,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:29,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:29,225 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash 59124385, now seen corresponding path program 1 times [2020-07-20 11:31:29,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:29,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853732758] [2020-07-20 11:31:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:29,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:31:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:29,412 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 11:31:29,413 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:29,424 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:29,425 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:29,425 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 11:31:29,464 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 11:31:29,466 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:29,469 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:29,470 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 11:31:29,471 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 11:31:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:29,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:29,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853732758] [2020-07-20 11:31:29,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:29,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:29,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564495778] [2020-07-20 11:31:29,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:29,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:29,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:29,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:29,487 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-20 11:31:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:29,699 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-20 11:31:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:31:29,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:31:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:29,702 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:31:29,703 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 11:31:29,704 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 11:31:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 11:31:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-07-20 11:31:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 11:31:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 11:31:29,716 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2020-07-20 11:31:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:29,717 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 11:31:29,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 11:31:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:31:29,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:29,718 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:29,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:29,933 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1951969173, now seen corresponding path program 1 times [2020-07-20 11:31:29,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:29,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483377615] [2020-07-20 11:31:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 11:31:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:30,119 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 11:31:30,120 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,141 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,149 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 11:31:30,150 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,165 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,166 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,166 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:24 [2020-07-20 11:31:30,284 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,285 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 11:31:30,287 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,492 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-07-20 11:31:30,495 INFO L624 ElimStorePlain]: treesize reduction 14, result has 88.9 percent of original size [2020-07-20 11:31:30,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:30,510 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,560 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:30,576 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 11:31:30,578 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,610 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,620 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 11:31:30,649 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,675 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,677 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2020-07-20 11:31:30,678 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,735 INFO L624 ElimStorePlain]: treesize reduction 20, result has 70.6 percent of original size [2020-07-20 11:31:30,739 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,740 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:114, output treesize:27 [2020-07-20 11:31:30,884 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,885 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 11:31:30,887 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:30,986 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:30,991 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_25|, |v_#memory_int_33|, |v_#memory_int_34|, |v_#memory_int_35|], 4=[|v_#memory_int_37|]} [2020-07-20 11:31:30,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:30,998 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,065 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,081 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 11:31:31,152 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,157 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 11:31:31,208 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,215 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:31,258 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:31,340 INFO L350 Elim1Store]: treesize reduction 65, result has 46.7 percent of original size [2020-07-20 11:31:31,341 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 85 [2020-07-20 11:31:31,343 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,429 INFO L624 ElimStorePlain]: treesize reduction 18, result has 81.4 percent of original size [2020-07-20 11:31:31,439 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 5 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:31,440 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:249, output treesize:43 [2020-07-20 11:31:31,638 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 11:31:31,639 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,656 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:31,657 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 11:31:31,658 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2020-07-20 11:31:31,683 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 11:31:31,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:31:31,741 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_25|, |v_#memory_int_33|, |v_#memory_int_35|], 3=[|v_#memory_int_34|]} [2020-07-20 11:31:31,752 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:31,972 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-07-20 11:31:31,973 INFO L624 ElimStorePlain]: treesize reduction 78, result has 51.6 percent of original size [2020-07-20 11:31:31,981 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 11:31:32,016 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,020 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 11:31:32,053 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,058 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 11:31:32,075 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,078 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:32,079 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:233, output treesize:60 [2020-07-20 11:31:32,220 INFO L440 ElimStorePlain]: Different costs {2=[|#memory_$Pointer$.base|, |v_#memory_int_31|, |v_#memory_int_32|], 7=[|v_#memory_int_39|]} [2020-07-20 11:31:32,230 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:32,528 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 68 [2020-07-20 11:31:32,530 INFO L624 ElimStorePlain]: treesize reduction 112, result has 51.9 percent of original size [2020-07-20 11:31:32,546 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 11:31:32,606 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,617 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 11:31:32,702 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,706 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 11:31:32,739 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:32,742 INFO L544 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 4 dim-2 vars, End of recursive call: 12 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:32,745 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 13 variables, input treesize:331, output treesize:117 [2020-07-20 11:31:34,928 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:34,929 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2020-07-20 11:31:34,930 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,935 INFO L624 ElimStorePlain]: treesize reduction 123, result has 0.8 percent of original size [2020-07-20 11:31:34,938 INFO L512 ElimStorePlain]: Eliminatee |v_#memory_int_30| vanished before elimination [2020-07-20 11:31:34,938 INFO L544 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:34,938 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 16 variables, input treesize:136, output treesize:1 [2020-07-20 11:31:34,950 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 11:31:34,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483377615] [2020-07-20 11:31:34,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:31:34,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 11:31:34,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200595009] [2020-07-20 11:31:34,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:31:34,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:31:34,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2020-07-20 11:31:34,953 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 11 states. [2020-07-20 11:31:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:39,701 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-07-20 11:31:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:31:39,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-07-20 11:31:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:39,705 INFO L225 Difference]: With dead ends: 64 [2020-07-20 11:31:39,706 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:31:39,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2020-07-20 11:31:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:31:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 23. [2020-07-20 11:31:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 11:31:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 11:31:39,715 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-07-20 11:31:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:39,716 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 11:31:39,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:31:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 11:31:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:31:39,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:39,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:39,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:39,921 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:39,922 INFO L82 PathProgramCache]: Analyzing trace with hash -506610811, now seen corresponding path program 1 times [2020-07-20 11:31:39,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:39,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790137419] [2020-07-20 11:31:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:31:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:40,050 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 11:31:40,051 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,055 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,055 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 11:31:40,056 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 11:31:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:40,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:40,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790137419] [2020-07-20 11:31:40,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:40,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:40,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441404933] [2020-07-20 11:31:40,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:40,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:40,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:40,072 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-07-20 11:31:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:40,200 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-20 11:31:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:40,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 11:31:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:40,201 INFO L225 Difference]: With dead ends: 39 [2020-07-20 11:31:40,201 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 11:31:40,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:31:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 11:31:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-07-20 11:31:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 11:31:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 11:31:40,206 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-07-20 11:31:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:40,207 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 11:31:40,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 11:31:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:31:40,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:40,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:40,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:40,408 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash -506551229, now seen corresponding path program 1 times [2020-07-20 11:31:40,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:40,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004847414] [2020-07-20 11:31:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:40,484 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:40,495 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:40,512 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:31:40,512 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:31:40,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:40,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:31:40 BoogieIcfgContainer [2020-07-20 11:31:40,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:31:40,757 INFO L168 Benchmark]: Toolchain (without parser) took 14776.96 ms. Allocated memory was 138.9 MB in the beginning and 254.8 MB in the end (delta: 115.9 MB). Free memory was 98.7 MB in the beginning and 84.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 130.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:40,758 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 138.9 MB. Free memory was 117.9 MB in the beginning and 117.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:31:40,758 INFO L168 Benchmark]: CACSL2BoogieTranslator took 896.28 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 98.3 MB in the beginning and 169.6 MB in the end (delta: -71.4 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:40,759 INFO L168 Benchmark]: Boogie Preprocessor took 107.91 ms. Allocated memory is still 201.9 MB. Free memory was 168.9 MB in the beginning and 166.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:40,760 INFO L168 Benchmark]: RCFGBuilder took 904.22 ms. Allocated memory is still 201.9 MB. Free memory was 166.0 MB in the beginning and 119.3 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:40,761 INFO L168 Benchmark]: TraceAbstraction took 12853.61 ms. Allocated memory was 201.9 MB in the beginning and 254.8 MB in the end (delta: 53.0 MB). Free memory was 119.3 MB in the beginning and 84.3 MB in the end (delta: 35.1 MB). Peak memory consumption was 88.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:40,764 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 138.9 MB. Free memory was 117.9 MB in the beginning and 117.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 896.28 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 98.3 MB in the beginning and 169.6 MB in the end (delta: -71.4 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.91 ms. Allocated memory is still 201.9 MB. Free memory was 168.9 MB in the beginning and 166.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 904.22 ms. Allocated memory is still 201.9 MB. Free memory was 166.0 MB in the beginning and 119.3 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12853.61 ms. Allocated memory was 201.9 MB in the beginning and 254.8 MB in the end (delta: 53.0 MB). Free memory was 119.3 MB in the beginning and 84.3 MB in the end (delta: 35.1 MB). Peak memory consumption was 88.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1040]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* list = malloc(sizeof(SLL)); [L995] list->next = ((void*)0) [L996] list->prev = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end = ((void*)0) [L1026] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1029] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1030] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1030] COND FALSE !(!(BLACK == end->colour)) [L1032] COND TRUE ((void*)0) != end [L1034] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1034] COND FALSE !(RED == end->colour) [L1040] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1040] COND TRUE !(end->next) [L1040] __VERIFIER_error() VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.7s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 144 SDtfs, 144 SDslu, 266 SDs, 0 SdLazy, 202 SolverSat, 48 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 70 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 9 QuantifiedInterpolants, 13336 SizeOfPredicates, 27 NumberOfNonLiveVariables, 393 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...