/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:28:06,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:28:06,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:28:06,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:28:06,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:28:06,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:28:06,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:28:06,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:28:06,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:28:06,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:28:06,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:28:06,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:28:06,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:28:06,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:28:06,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:28:06,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:28:06,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:28:06,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:28:06,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:28:06,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:28:06,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:28:06,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:28:06,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:28:06,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:28:06,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:28:06,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:28:06,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:28:06,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:28:06,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:28:06,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:28:06,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:28:06,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:28:06,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:28:06,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:28:06,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:28:06,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:28:06,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:28:06,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:28:06,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:28:06,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:28:06,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:28:06,247 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 [2020-10-23 18:28:06,291 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:28:06,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:28:06,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:28:06,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:28:06,293 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:28:06,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:28:06,294 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:28:06,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:28:06,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:28:06,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:28:06,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:28:06,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:28:06,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:28:06,295 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:28:06,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:28:06,296 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:28:06,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:28:06,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:28:06,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:28:06,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:28:06,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:28:06,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:28:06,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:28:06,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:28:06,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:28:06,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:28:06,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:28:06,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:28:06,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:28:06,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:28:06,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:28:06,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:28:06,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:28:06,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:28:06,712 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:28:06,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-10-23 18:28:06,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d817aaae/0c38991950744ce68ac088c9c463683a/FLAG250037193 [2020-10-23 18:28:07,394 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:28:07,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-10-23 18:28:07,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d817aaae/0c38991950744ce68ac088c9c463683a/FLAG250037193 [2020-10-23 18:28:07,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d817aaae/0c38991950744ce68ac088c9c463683a [2020-10-23 18:28:07,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:28:07,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:28:07,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:28:07,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:28:07,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:28:07,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:28:07" (1/1) ... [2020-10-23 18:28:07,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2496fd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:07, skipping insertion in model container [2020-10-23 18:28:07,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:28:07" (1/1) ... [2020-10-23 18:28:07,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:28:07,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:28:08,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:28:08,116 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:28:08,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:28:08,284 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:28:08,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08 WrapperNode [2020-10-23 18:28:08,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:28:08,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:28:08,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:28:08,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:28:08,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:28:08,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:28:08,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:28:08,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:28:08,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (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 [2020-10-23 18:28:08,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:28:08,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:28:08,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:28:08,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 18:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 18:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 18:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 18:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 18:28:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 18:28:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 18:28:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 18:28:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 18:28:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 18:28:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 18:28:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 18:28:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:28:09,128 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:28:09,128 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-10-23 18:28:09,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:09 BoogieIcfgContainer [2020-10-23 18:28:09,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:28:09,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:28:09,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:28:09,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:28:09,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:28:07" (1/3) ... [2020-10-23 18:28:09,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a576010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:09, skipping insertion in model container [2020-10-23 18:28:09,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (2/3) ... [2020-10-23 18:28:09,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a576010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:09, skipping insertion in model container [2020-10-23 18:28:09,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:09" (3/3) ... [2020-10-23 18:28:09,142 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-10-23 18:28:09,156 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:28:09,166 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:28:09,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:28:09,223 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:28:09,223 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:28:09,223 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:28:09,223 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:28:09,230 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:28:09,230 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:28:09,230 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:28:09,230 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:28:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-23 18:28:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:28:09,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:09,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:09,262 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash 444257067, now seen corresponding path program 1 times [2020-10-23 18:28:09,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:09,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638428526] [2020-10-23 18:28:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:09,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:09,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638428526] [2020-10-23 18:28:09,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:09,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:28:09,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107479676] [2020-10-23 18:28:09,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:28:09,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:28:09,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:28:09,540 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-10-23 18:28:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:09,719 INFO L93 Difference]: Finished difference Result 99 states and 172 transitions. [2020-10-23 18:28:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:28:09,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-23 18:28:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:09,735 INFO L225 Difference]: With dead ends: 99 [2020-10-23 18:28:09,735 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:28:09,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:28:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:28:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:28:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:28:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-23 18:28:09,794 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 12 [2020-10-23 18:28:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:09,795 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-23 18:28:09,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:28:09,795 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-23 18:28:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:28:09,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:09,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:09,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:28:09,798 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:09,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:09,799 INFO L82 PathProgramCache]: Analyzing trace with hash 571755276, now seen corresponding path program 1 times [2020-10-23 18:28:09,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:09,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355178504] [2020-10-23 18:28:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:09,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:10,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355178504] [2020-10-23 18:28:10,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:10,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:10,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366638622] [2020-10-23 18:28:10,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:10,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:10,004 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 5 states. [2020-10-23 18:28:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:10,241 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-23 18:28:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:10,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-23 18:28:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:10,243 INFO L225 Difference]: With dead ends: 50 [2020-10-23 18:28:10,243 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:28:10,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:28:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-23 18:28:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:28:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-23 18:28:10,253 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 13 [2020-10-23 18:28:10,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:10,254 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-23 18:28:10,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-23 18:28:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-23 18:28:10,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:10,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:10,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:28:10,255 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:10,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:10,256 INFO L82 PathProgramCache]: Analyzing trace with hash 541512391, now seen corresponding path program 1 times [2020-10-23 18:28:10,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:10,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059015779] [2020-10-23 18:28:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:10,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:10,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059015779] [2020-10-23 18:28:10,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:10,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:10,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087492529] [2020-10-23 18:28:10,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:10,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:10,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:10,367 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-10-23 18:28:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:10,765 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-23 18:28:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:10,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-23 18:28:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:10,768 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:28:10,768 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 18:28:10,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 18:28:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-23 18:28:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:28:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-23 18:28:10,783 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2020-10-23 18:28:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:10,783 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-23 18:28:10,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-23 18:28:10,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:28:10,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:10,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:10,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:28:10,787 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -38373523, now seen corresponding path program 1 times [2020-10-23 18:28:10,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:10,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737548344] [2020-10-23 18:28:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:10,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:10,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737548344] [2020-10-23 18:28:10,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:10,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:28:10,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994528977] [2020-10-23 18:28:10,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:28:10,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:10,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:28:10,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:10,916 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2020-10-23 18:28:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:11,165 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-23 18:28:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:28:11,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:28:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:11,167 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:28:11,167 INFO L226 Difference]: Without dead ends: 60 [2020-10-23 18:28:11,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:28:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-23 18:28:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-10-23 18:28:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:28:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-23 18:28:11,176 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 16 [2020-10-23 18:28:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:11,176 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-23 18:28:11,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:28:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-23 18:28:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:28:11,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:11,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:11,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:28:11,178 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash -575459649, now seen corresponding path program 1 times [2020-10-23 18:28:11,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:11,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307759351] [2020-10-23 18:28:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:11,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:11,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307759351] [2020-10-23 18:28:11,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:11,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:11,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970903108] [2020-10-23 18:28:11,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:11,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:11,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:11,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:11,284 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 5 states. [2020-10-23 18:28:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:11,511 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-23 18:28:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:11,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-23 18:28:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:11,512 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:28:11,512 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 18:28:11,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 18:28:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-23 18:28:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-23 18:28:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-23 18:28:11,520 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2020-10-23 18:28:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:11,520 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-23 18:28:11,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-23 18:28:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:28:11,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:11,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:11,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:28:11,522 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:11,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1021377268, now seen corresponding path program 1 times [2020-10-23 18:28:11,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:11,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569369710] [2020-10-23 18:28:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:11,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:11,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569369710] [2020-10-23 18:28:11,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:11,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:11,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102299754] [2020-10-23 18:28:11,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:11,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:11,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:11,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:11,614 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states. [2020-10-23 18:28:11,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:11,803 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-23 18:28:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:28:11,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-23 18:28:11,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:11,805 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:28:11,805 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:28:11,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:28:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:28:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:28:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-23 18:28:11,811 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2020-10-23 18:28:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:11,812 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-23 18:28:11,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-23 18:28:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:28:11,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:11,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:11,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:28:11,813 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash -605625927, now seen corresponding path program 1 times [2020-10-23 18:28:11,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:11,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467188512] [2020-10-23 18:28:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:11,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:11,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467188512] [2020-10-23 18:28:11,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:11,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:28:11,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336705827] [2020-10-23 18:28:11,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:28:11,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:11,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:28:11,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:11,934 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-10-23 18:28:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:12,181 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-23 18:28:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:28:12,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-23 18:28:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:12,183 INFO L225 Difference]: With dead ends: 60 [2020-10-23 18:28:12,183 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:28:12,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:28:12,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:28:12,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-23 18:28:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:28:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-23 18:28:12,190 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 20 [2020-10-23 18:28:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:12,190 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-23 18:28:12,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:28:12,190 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-23 18:28:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:28:12,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:12,191 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:12,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:28:12,191 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:12,192 INFO L82 PathProgramCache]: Analyzing trace with hash 727972317, now seen corresponding path program 1 times [2020-10-23 18:28:12,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:12,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226326962] [2020-10-23 18:28:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:12,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:12,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226326962] [2020-10-23 18:28:12,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098614663] [2020-10-23 18:28:12,306 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:12,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 18:28:12,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:12,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:12,578 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 17 [2020-10-23 18:28:12,579 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:12,592 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:12,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:12,601 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 17 [2020-10-23 18:28:12,602 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:12,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:12,612 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:12,612 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2020-10-23 18:28:12,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:12,694 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2020-10-23 18:28:12,697 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:12,709 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:12,716 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-10-23 18:28:12,716 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 24 treesize of output 10 [2020-10-23 18:28:12,718 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:12,831 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-10-23 18:28:12,831 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:12,832 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:12,832 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:7 [2020-10-23 18:28:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:12,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:12,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-23 18:28:12,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557863655] [2020-10-23 18:28:12,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:28:12,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:12,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:28:12,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:28:12,865 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-10-23 18:28:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:13,371 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-23 18:28:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:28:13,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-23 18:28:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:13,372 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:28:13,372 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:28:13,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:28:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:28:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:28:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:28:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-23 18:28:13,385 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 23 [2020-10-23 18:28:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:13,385 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-23 18:28:13,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:28:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-23 18:28:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:28:13,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:13,390 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:13,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-10-23 18:28:13,591 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:13,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:13,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1402037848, now seen corresponding path program 1 times [2020-10-23 18:28:13,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:13,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036841349] [2020-10-23 18:28:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:13,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:13,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036841349] [2020-10-23 18:28:13,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623442860] [2020-10-23 18:28:13,777 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:13,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-23 18:28:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:14,013 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-23 18:28:14,013 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 [2020-10-23 18:28:14,014 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,027 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,034 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 [2020-10-23 18:28:14,035 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,048 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,050 INFO L545 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. [2020-10-23 18:28:14,051 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:26 [2020-10-23 18:28:14,277 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,278 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 11 treesize of output 15 [2020-10-23 18:28:14,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:28:14,285 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,320 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:14,335 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 [2020-10-23 18:28:14,335 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,358 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:14,364 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,382 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,388 INFO L545 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:14,402 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,422 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,423 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 [2020-10-23 18:28:14,424 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,460 INFO L625 ElimStorePlain]: treesize reduction 20, result has 63.6 percent of original size [2020-10-23 18:28:14,464 INFO L545 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. [2020-10-23 18:28:14,464 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:105, output treesize:14 [2020-10-23 18:28:14,490 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 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-23 18:28:14,490 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,499 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:14,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:23 [2020-10-23 18:28:14,638 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-10-23 18:28:14,639 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,643 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,644 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,645 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:3 [2020-10-23 18:28:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:14,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:14,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-10-23 18:28:14,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318608782] [2020-10-23 18:28:14,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:28:14,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:14,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:28:14,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:28:14,654 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 12 states. [2020-10-23 18:28:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:15,377 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-23 18:28:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:28:15,377 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-23 18:28:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:15,378 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:28:15,379 INFO L226 Difference]: Without dead ends: 72 [2020-10-23 18:28:15,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:28:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-23 18:28:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-23 18:28:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 18:28:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-10-23 18:28:15,399 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 27 [2020-10-23 18:28:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:15,400 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-10-23 18:28:15,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:28:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-10-23 18:28:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:28:15,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:15,402 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:15,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:15,603 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1203985706, now seen corresponding path program 1 times [2020-10-23 18:28:15,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:15,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632937164] [2020-10-23 18:28:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:15,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:15,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632937164] [2020-10-23 18:28:15,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187044381] [2020-10-23 18:28:15,854 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-23 18:28:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:16,053 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-23 18:28:16,053 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 [2020-10-23 18:28:16,054 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:16,068 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,073 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 [2020-10-23 18:28:16,074 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:16,089 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,090 INFO L545 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. [2020-10-23 18:28:16,091 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:29 [2020-10-23 18:28:16,230 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,230 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 [2020-10-23 18:28:16,231 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:16,359 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-23 18:28:16,360 INFO L625 ElimStorePlain]: treesize reduction 14, result has 89.1 percent of original size [2020-10-23 18:28:16,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:16,369 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:16,411 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,414 INFO L545 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:16,447 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,452 INFO L545 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:16,490 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:16,522 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,522 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 1 case distinctions, treesize of input 77 treesize of output 55 [2020-10-23 18:28:16,523 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:16,582 INFO L625 ElimStorePlain]: treesize reduction 20, result has 74.4 percent of original size [2020-10-23 18:28:16,586 INFO L545 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. [2020-10-23 18:28:16,587 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:117, output treesize:27 [2020-10-23 18:28:16,806 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,806 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 [2020-10-23 18:28:16,807 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:16,874 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,876 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_31|, |v_#memory_$Pointer$.offset_30|, |v_#memory_int_45|, |v_#memory_int_46|, |v_#memory_int_47|], 4=[|v_#memory_int_49|]} [2020-10-23 18:28:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:16,880 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:16,931 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:16,937 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:16,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:16,981 INFO L545 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:17,027 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:17,037 INFO L545 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:17,072 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:17,075 INFO L545 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:17,096 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:17,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:17,112 INFO L350 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2020-10-23 18:28:17,113 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2020-10-23 18:28:17,113 INFO L545 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:17,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:17,153 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 6 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:17,154 INFO L244 ElimStorePlain]: Needed 8 recursive calls to eliminate 10 variables, input treesize:319, output treesize:41 [2020-10-23 18:28:17,332 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 31 treesize of output 13 [2020-10-23 18:28:17,334 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:17,342 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:17,344 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:17,344 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:43, output treesize:3 [2020-10-23 18:28:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:17,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:17,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-10-23 18:28:17,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198163127] [2020-10-23 18:28:17,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:28:17,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:17,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:28:17,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:28:17,371 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 12 states. [2020-10-23 18:28:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:22,319 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-10-23 18:28:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:28:22,319 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-23 18:28:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:22,320 INFO L225 Difference]: With dead ends: 90 [2020-10-23 18:28:22,320 INFO L226 Difference]: Without dead ends: 86 [2020-10-23 18:28:22,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:28:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-23 18:28:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 40. [2020-10-23 18:28:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:28:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-23 18:28:22,328 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2020-10-23 18:28:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:22,328 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-23 18:28:22,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:28:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-23 18:28:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:28:22,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:22,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:22,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 18:28:22,530 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:22,531 INFO L82 PathProgramCache]: Analyzing trace with hash -695799998, now seen corresponding path program 1 times [2020-10-23 18:28:22,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:22,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529784703] [2020-10-23 18:28:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:22,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:22,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529784703] [2020-10-23 18:28:22,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796892992] [2020-10-23 18:28:22,914 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:23,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-23 18:28:23,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:23,110 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-23 18:28:23,110 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 [2020-10-23 18:28:23,111 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,119 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,120 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:23,120 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:23 [2020-10-23 18:28:23,187 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,188 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 11 treesize of output 15 [2020-10-23 18:28:23,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:28:23,196 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,220 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:23,237 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:28:23,250 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,250 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 41 [2020-10-23 18:28:23,252 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,315 INFO L625 ElimStorePlain]: treesize reduction 16, result has 88.4 percent of original size [2020-10-23 18:28:23,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:23,334 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,334 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 63 treesize of output 41 [2020-10-23 18:28:23,335 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,380 INFO L625 ElimStorePlain]: treesize reduction 16, result has 77.8 percent of original size [2020-10-23 18:28:23,381 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,382 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:194, output treesize:46 [2020-10-23 18:28:23,432 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_50|], 4=[|v_#memory_$Pointer$.base_34|], 6=[|v_#memory_$Pointer$.offset_32|]} [2020-10-23 18:28:23,436 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-10-23 18:28:23,436 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,467 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,472 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,472 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 1 case distinctions, treesize of input 107 treesize of output 72 [2020-10-23 18:28:23,473 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,491 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,497 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2020-10-23 18:28:23,498 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,520 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,520 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,520 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:125, output treesize:63 [2020-10-23 18:28:23,619 INFO L441 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.base|], 1=[|#memory_$Pointer$.offset|]} [2020-10-23 18:28:23,623 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,623 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 35 [2020-10-23 18:28:23,627 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,639 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,642 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-10-23 18:28:23,644 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,649 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,650 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,651 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:11 [2020-10-23 18:28:23,681 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 [2020-10-23 18:28:23,682 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,685 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:23,685 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:23,685 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-10-23 18:28:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:23,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:23,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-10-23 18:28:23,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215733700] [2020-10-23 18:28:23,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:28:23,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:23,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:28:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:28:23,734 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 19 states. [2020-10-23 18:28:24,939 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-23 18:28:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:25,263 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-10-23 18:28:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:28:25,263 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-23 18:28:25,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:25,265 INFO L225 Difference]: With dead ends: 97 [2020-10-23 18:28:25,265 INFO L226 Difference]: Without dead ends: 84 [2020-10-23 18:28:25,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:28:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-23 18:28:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2020-10-23 18:28:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-23 18:28:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-23 18:28:25,277 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 34 [2020-10-23 18:28:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:25,278 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-23 18:28:25,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:28:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-23 18:28:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:28:25,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:25,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:25,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:25,489 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:25,490 INFO L82 PathProgramCache]: Analyzing trace with hash -633760384, now seen corresponding path program 1 times [2020-10-23 18:28:25,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:25,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347661086] [2020-10-23 18:28:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:25,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:25,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347661086] [2020-10-23 18:28:25,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53688877] [2020-10-23 18:28:25,978 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:26,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 53 conjunts are in the unsatisfiable core [2020-10-23 18:28:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:26,163 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-23 18:28:26,163 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 [2020-10-23 18:28:26,164 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:26,176 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:26,177 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:26,177 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:23 [2020-10-23 18:28:26,223 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:26,223 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 [2020-10-23 18:28:26,224 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:26,333 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-23 18:28:26,334 INFO L625 ElimStorePlain]: treesize reduction 14, result has 93.5 percent of original size [2020-10-23 18:28:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:26,359 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:28:26,376 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:26,376 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 63 treesize of output 41 [2020-10-23 18:28:26,377 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:26,456 INFO L625 ElimStorePlain]: treesize reduction 16, result has 89.4 percent of original size [2020-10-23 18:28:26,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:26,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:26,480 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:26,481 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 41 [2020-10-23 18:28:26,481 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:26,553 INFO L625 ElimStorePlain]: treesize reduction 16, result has 81.2 percent of original size [2020-10-23 18:28:26,554 INFO L545 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. [2020-10-23 18:28:26,555 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:203, output treesize:66 [2020-10-23 18:28:26,685 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:26,686 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 20 treesize of output 30 [2020-10-23 18:28:26,686 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:26,834 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-23 18:28:26,834 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:26,836 INFO L441 ElimStorePlain]: Different costs {6=[|v_#memory_$Pointer$.offset_35|, |v_#memory_$Pointer$.base_37|], 11=[|v_#memory_$Pointer$.offset_33|, |v_#memory_$Pointer$.base_35|]} [2020-10-23 18:28:26,868 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2020-10-23 18:28:26,869 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:27,037 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-23 18:28:27,037 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:27,052 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:27,052 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 406 treesize of output 274 [2020-10-23 18:28:27,054 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:27,310 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-23 18:28:27,310 INFO L625 ElimStorePlain]: treesize reduction 16, result has 96.1 percent of original size [2020-10-23 18:28:27,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:27,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:27,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:27,326 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:28:27,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:27,386 INFO L350 Elim1Store]: treesize reduction 5, result has 90.7 percent of original size [2020-10-23 18:28:27,387 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 97 [2020-10-23 18:28:27,389 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:27,541 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-23 18:28:27,541 INFO L625 ElimStorePlain]: treesize reduction 41, result has 86.4 percent of original size [2020-10-23 18:28:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:27,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:27,623 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:27,623 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 174 treesize of output 144 [2020-10-23 18:28:27,624 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:27,792 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-23 18:28:27,793 INFO L625 ElimStorePlain]: treesize reduction 134, result has 42.7 percent of original size [2020-10-23 18:28:27,794 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:27,794 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:457, output treesize:97 [2020-10-23 18:28:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:28,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:28,032 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 19 [2020-10-23 18:28:28,035 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:28,050 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:28,051 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:28,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:135, output treesize:72 [2020-10-23 18:28:28,145 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:28,145 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 69 treesize of output 82 [2020-10-23 18:28:28,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:28:28,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:28:28,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:28:28,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:28:28,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:28:28,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:28:28,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:28:28,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:28:28,155 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:28,160 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:28,160 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:28,161 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:4 [2020-10-23 18:28:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:28,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:28,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2020-10-23 18:28:28,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085358316] [2020-10-23 18:28:28,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:28:28,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:28,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:28:28,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:28:28,181 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 18 states. [2020-10-23 18:28:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:30,543 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2020-10-23 18:28:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:28:30,544 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-23 18:28:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:30,545 INFO L225 Difference]: With dead ends: 121 [2020-10-23 18:28:30,545 INFO L226 Difference]: Without dead ends: 117 [2020-10-23 18:28:30,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:28:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-23 18:28:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 83. [2020-10-23 18:28:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-23 18:28:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2020-10-23 18:28:30,557 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 34 [2020-10-23 18:28:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:30,558 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2020-10-23 18:28:30,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:28:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2020-10-23 18:28:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 18:28:30,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:30,560 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:30,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:28:30,773 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:30,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:30,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1293216844, now seen corresponding path program 2 times [2020-10-23 18:28:30,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:30,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957096340] [2020-10-23 18:28:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:31,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:31,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957096340] [2020-10-23 18:28:31,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264061043] [2020-10-23 18:28:31,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:31,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:28:31,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:28:31,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-23 18:28:31,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:31,422 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-23 18:28:31,423 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 [2020-10-23 18:28:31,423 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,436 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,436 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:31,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:23 [2020-10-23 18:28:31,469 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,470 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 11 treesize of output 15 [2020-10-23 18:28:31,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:28:31,472 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:31,524 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:28:31,536 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,536 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 41 [2020-10-23 18:28:31,537 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,594 INFO L625 ElimStorePlain]: treesize reduction 16, result has 88.7 percent of original size [2020-10-23 18:28:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:31,618 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,618 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 63 treesize of output 41 [2020-10-23 18:28:31,619 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,683 INFO L625 ElimStorePlain]: treesize reduction 16, result has 78.7 percent of original size [2020-10-23 18:28:31,684 INFO L545 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. [2020-10-23 18:28:31,685 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:197, output treesize:56 [2020-10-23 18:28:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:31,777 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2020-10-23 18:28:31,778 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,805 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:31,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:31,813 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2020-10-23 18:28:31,814 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,836 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,836 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,837 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:94, output treesize:56 [2020-10-23 18:28:32,101 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-10-23 18:28:32,101 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 53 [2020-10-23 18:28:32,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-23 18:28:32,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-23 18:28:32,107 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:32,146 INFO L625 ElimStorePlain]: treesize reduction 8, result has 84.3 percent of original size [2020-10-23 18:28:32,161 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:32,162 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 32 [2020-10-23 18:28:32,163 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:32,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:32,176 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:32,176 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:10 [2020-10-23 18:28:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:32,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:32,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2020-10-23 18:28:32,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269204063] [2020-10-23 18:28:32,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:28:32,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:32,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:28:32,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:28:32,205 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 17 states. [2020-10-23 18:28:36,873 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-23 18:28:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:37,140 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-10-23 18:28:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:28:37,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-23 18:28:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:37,143 INFO L225 Difference]: With dead ends: 100 [2020-10-23 18:28:37,143 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:28:37,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:28:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:28:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 18:28:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 18:28:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-10-23 18:28:37,165 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 37 [2020-10-23 18:28:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:37,165 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-10-23 18:28:37,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:28:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-10-23 18:28:37,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 18:28:37,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:37,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:37,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:37,372 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2057975726, now seen corresponding path program 1 times [2020-10-23 18:28:37,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:37,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166084239] [2020-10-23 18:28:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:37,447 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:37,484 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:37,525 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:28:37,525 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:28:37,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 18:28:37,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:28:37 BoogieIcfgContainer [2020-10-23 18:28:37,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:28:37,606 INFO L168 Benchmark]: Toolchain (without parser) took 29961.44 ms. Allocated memory was 151.0 MB in the beginning and 267.4 MB in the end (delta: 116.4 MB). Free memory was 107.0 MB in the beginning and 231.3 MB in the end (delta: -124.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:28:37,607 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:28:37,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 634.25 ms. Allocated memory is still 151.0 MB. Free memory was 106.2 MB in the beginning and 122.4 MB in the end (delta: -16.2 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:37,607 INFO L168 Benchmark]: Boogie Preprocessor took 73.34 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 119.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:37,608 INFO L168 Benchmark]: RCFGBuilder took 770.54 ms. Allocated memory is still 151.0 MB. Free memory was 119.6 MB in the beginning and 124.8 MB in the end (delta: -5.2 MB). Peak memory consumption was 49.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:37,613 INFO L168 Benchmark]: TraceAbstraction took 28470.12 ms. Allocated memory was 151.0 MB in the beginning and 267.4 MB in the end (delta: 116.4 MB). Free memory was 124.3 MB in the beginning and 231.3 MB in the end (delta: -107.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:37,615 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 634.25 ms. Allocated memory is still 151.0 MB. Free memory was 106.2 MB in the beginning and 122.4 MB in the end (delta: -16.2 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 73.34 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 119.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 770.54 ms. Allocated memory is still 151.0 MB. Free memory was 119.6 MB in the beginning and 124.8 MB in the end (delta: -5.2 MB). Peak memory consumption was 49.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 28470.12 ms. Allocated memory was 151.0 MB in the beginning and 267.4 MB in the end (delta: 116.4 MB). Free memory was 124.3 MB in the beginning and 231.3 MB in the end (delta: -107.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) [L1000] null->prev = ((void*)0) [L1001] null->colour = BLACK [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null [L1005] list->prev = null [L1006] list->colour = BLACK [L1008] struct TSLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1011] COND TRUE __VERIFIER_nondet_int() [L1014] end->next = malloc(sizeof(struct TSLL)) [L1015] EXPR end->next [L1015] end->next->prev = end [L1016] EXPR end->next [L1016] end = end->next [L1017] end->next = null [L1019] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end->colour = RED [L1026] end->next = malloc(sizeof(struct TSLL)) [L1027] EXPR end->next [L1027] end->next->prev = end [L1028] EXPR end->next [L1028] end = end->next [L1029] end->next = null [L1030] end->colour = BLACK VAL [end={-4:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1032] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1032] COND FALSE !(!(BLACK == end->colour)) [L1033] EXPR end->next VAL [end={-4:0}, end->next={-2:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1033] COND FALSE !(!(null == end->next)) [L1034] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1042] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE null != end [L1045] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1045] COND FALSE !(RED == end->colour) [L1052] EXPR end->next [L1052] end = end->next [L1043] COND TRUE null != end [L1045] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1045] COND TRUE RED == end->colour [L1047] EXPR end->next [L1047] end = end->next [L1048] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1049] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-1:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-2:0}] [L1049] COND TRUE !(BLACK != end->colour) [L1049] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-rb-sentinel-1.c", 14, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.3s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 16.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 455 SDtfs, 661 SDslu, 1586 SDs, 0 SdLazy, 2224 SolverSat, 240 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 13.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 329 GetRequests, 183 SyntacticMatches, 6 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 140 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 512 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 456 ConstructedInterpolants, 45 QuantifiedInterpolants, 320535 SizeOfPredicates, 87 NumberOfNonLiveVariables, 1066 ConjunctsInSsa, 212 ConjunctsInUnsatCore, 19 InterpolantComputations, 7 PerfectInterpolantSequences, 9/46 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...