/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:20:46,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:20:46,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:20:46,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:20:46,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:20:46,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:20:46,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:20:46,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:20:46,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:20:46,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:20:46,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:20:46,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:20:46,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:20:46,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:20:46,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:20:46,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:20:46,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:20:46,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:20:46,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:20:46,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:20:46,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:20:46,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:20:46,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:20:46,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:20:46,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:20:46,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:20:46,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:20:46,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:20:46,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:20:46,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:20:46,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:20:46,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:20:46,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:20:46,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:20:46,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:20:46,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:20:46,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:20:46,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:20:46,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:20:46,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:20:46,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:20:46,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:20:46,177 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:20:46,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:20:46,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:20:46,179 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:20:46,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:20:46,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:20:46,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:20:46,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:20:46,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:20:46,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:20:46,181 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:20:46,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:20:46,182 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:20:46,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:20:46,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:20:46,183 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:20:46,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:20:46,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:20:46,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:20:46,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:20:46,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:20:46,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:20:46,184 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 22:20:46,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:20:46,492 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:20:46,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:20:46,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:20:46,503 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:20:46,503 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-22 22:20:46,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20cfa4aab/07f10884a24843cd96ccec497644c58a/FLAG9acd2811a [2020-08-22 22:20:47,082 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:20:47,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-22 22:20:47,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20cfa4aab/07f10884a24843cd96ccec497644c58a/FLAG9acd2811a [2020-08-22 22:20:47,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20cfa4aab/07f10884a24843cd96ccec497644c58a [2020-08-22 22:20:47,444 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:20:47,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:20:47,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:20:47,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:20:47,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:20:47,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:20:47" (1/1) ... [2020-08-22 22:20:47,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18296ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:47, skipping insertion in model container [2020-08-22 22:20:47,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:20:47" (1/1) ... [2020-08-22 22:20:47,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:20:47,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:20:47,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:20:47,912 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:20:47,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:20:48,022 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:20:48,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48 WrapperNode [2020-08-22 22:20:48,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:20:48,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:20:48,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:20:48,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:20:48,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48" (1/1) ... [2020-08-22 22:20:48,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48" (1/1) ... [2020-08-22 22:20:48,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48" (1/1) ... [2020-08-22 22:20:48,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48" (1/1) ... [2020-08-22 22:20:48,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48" (1/1) ... [2020-08-22 22:20:48,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48" (1/1) ... [2020-08-22 22:20:48,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48" (1/1) ... [2020-08-22 22:20:48,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:20:48,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:20:48,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:20:48,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:20:48,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48" (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 [2020-08-22 22:20:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:20:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:20:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 22:20:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 22:20:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 22:20:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:20:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:20:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:20:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 22:20:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 22:20:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 22:20:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 22:20:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 22:20:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 22:20:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 22:20:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 22:20:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 22:20:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 22:20:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 22:20:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 22:20:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 22:20:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 22:20:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 22:20:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 22:20:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 22:20:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 22:20:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 22:20:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 22:20:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 22:20:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 22:20:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 22:20:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 22:20:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 22:20:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 22:20:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 22:20:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 22:20:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 22:20:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 22:20:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 22:20:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 22:20:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 22:20:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 22:20:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 22:20:48,161 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 22:20:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 22:20:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 22:20:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 22:20:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 22:20:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 22:20:48,162 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 22:20:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 22:20:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 22:20:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 22:20:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 22:20:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 22:20:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 22:20:48,163 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 22:20:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 22:20:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 22:20:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 22:20:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:20:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 22:20:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 22:20:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 22:20:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 22:20:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 22:20:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 22:20:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 22:20:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 22:20:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 22:20:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 22:20:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 22:20:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 22:20:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 22:20:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 22:20:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 22:20:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 22:20:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 22:20:48,167 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 22:20:48,167 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 22:20:48,167 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 22:20:48,167 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 22:20:48,167 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 22:20:48,167 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 22:20:48,168 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 22:20:48,168 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 22:20:48,168 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 22:20:48,168 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 22:20:48,168 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 22:20:48,168 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 22:20:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 22:20:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 22:20:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 22:20:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 22:20:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 22:20:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 22:20:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 22:20:48,170 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 22:20:48,170 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 22:20:48,170 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 22:20:48,170 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 22:20:48,170 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 22:20:48,170 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 22:20:48,170 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 22:20:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 22:20:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 22:20:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 22:20:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 22:20:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 22:20:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 22:20:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 22:20:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 22:20:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 22:20:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 22:20:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:20:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:20:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:20:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:20:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:20:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:20:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:20:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:20:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:20:48,510 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 22:20:48,895 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:20:48,896 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-22 22:20:48,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:20:48 BoogieIcfgContainer [2020-08-22 22:20:48,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:20:48,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:20:48,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:20:48,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:20:48,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:20:47" (1/3) ... [2020-08-22 22:20:48,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a7d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:20:48, skipping insertion in model container [2020-08-22 22:20:48,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:48" (2/3) ... [2020-08-22 22:20:48,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a7d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:20:48, skipping insertion in model container [2020-08-22 22:20:48,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:20:48" (3/3) ... [2020-08-22 22:20:48,910 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-08-22 22:20:48,921 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:20:48,929 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:20:48,943 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:20:48,966 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:20:48,966 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:20:48,966 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:20:48,967 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:20:48,967 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:20:48,967 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:20:48,967 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:20:48,968 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:20:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2020-08-22 22:20:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 22:20:49,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:49,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:49,004 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:49,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:49,010 INFO L82 PathProgramCache]: Analyzing trace with hash -652445128, now seen corresponding path program 1 times [2020-08-22 22:20:49,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:49,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064721688] [2020-08-22 22:20:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:49,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:49,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064721688] [2020-08-22 22:20:49,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:49,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:20:49,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770935793] [2020-08-22 22:20:49,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:20:49,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:49,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:20:49,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:20:49,271 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 3 states. [2020-08-22 22:20:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:49,687 INFO L93 Difference]: Finished difference Result 342 states and 400 transitions. [2020-08-22 22:20:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:20:49,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 22:20:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:49,710 INFO L225 Difference]: With dead ends: 342 [2020-08-22 22:20:49,710 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 22:20:49,718 INFO L675 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 [2020-08-22 22:20:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 22:20:49,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-08-22 22:20:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-08-22 22:20:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 183 transitions. [2020-08-22 22:20:49,807 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 183 transitions. Word has length 31 [2020-08-22 22:20:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:49,808 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 183 transitions. [2020-08-22 22:20:49,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:20:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 183 transitions. [2020-08-22 22:20:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 22:20:49,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:49,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:49,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:20:49,817 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:49,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:49,819 INFO L82 PathProgramCache]: Analyzing trace with hash 473660712, now seen corresponding path program 1 times [2020-08-22 22:20:49,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:49,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478756395] [2020-08-22 22:20:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:49,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:49,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478756395] [2020-08-22 22:20:49,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:49,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:20:49,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459861911] [2020-08-22 22:20:49,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:20:49,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:49,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:20:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:20:49,958 INFO L87 Difference]: Start difference. First operand 166 states and 183 transitions. Second operand 5 states. [2020-08-22 22:20:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:50,298 INFO L93 Difference]: Finished difference Result 251 states and 277 transitions. [2020-08-22 22:20:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:20:50,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-08-22 22:20:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:50,303 INFO L225 Difference]: With dead ends: 251 [2020-08-22 22:20:50,304 INFO L226 Difference]: Without dead ends: 201 [2020-08-22 22:20:50,305 INFO L675 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 [2020-08-22 22:20:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-08-22 22:20:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-08-22 22:20:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 22:20:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2020-08-22 22:20:50,334 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 41 [2020-08-22 22:20:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:50,334 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2020-08-22 22:20:50,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:20:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2020-08-22 22:20:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 22:20:50,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:50,337 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, 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, 1] [2020-08-22 22:20:50,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:20:50,337 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1870874818, now seen corresponding path program 1 times [2020-08-22 22:20:50,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:50,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83802821] [2020-08-22 22:20:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:50,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:50,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83802821] [2020-08-22 22:20:50,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:50,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 22:20:50,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547332448] [2020-08-22 22:20:50,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 22:20:50,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 22:20:50,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:20:50,460 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 4 states. [2020-08-22 22:20:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:50,719 INFO L93 Difference]: Finished difference Result 321 states and 359 transitions. [2020-08-22 22:20:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 22:20:50,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-08-22 22:20:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:50,721 INFO L225 Difference]: With dead ends: 321 [2020-08-22 22:20:50,721 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 22:20:50,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:20:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 22:20:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-08-22 22:20:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-22 22:20:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions. [2020-08-22 22:20:50,762 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 54 [2020-08-22 22:20:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:50,762 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions. [2020-08-22 22:20:50,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 22:20:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions. [2020-08-22 22:20:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 22:20:50,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:50,767 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, 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, 1, 1, 1] [2020-08-22 22:20:50,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:20:50,773 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:50,775 INFO L82 PathProgramCache]: Analyzing trace with hash 129316031, now seen corresponding path program 1 times [2020-08-22 22:20:50,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:50,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478939215] [2020-08-22 22:20:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:50,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:20:50,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478939215] [2020-08-22 22:20:50,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:50,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 22:20:50,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72828800] [2020-08-22 22:20:50,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:20:50,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:20:50,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:20:50,926 INFO L87 Difference]: Start difference. First operand 202 states and 224 transitions. Second operand 7 states. [2020-08-22 22:20:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:51,294 INFO L93 Difference]: Finished difference Result 279 states and 306 transitions. [2020-08-22 22:20:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:20:51,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-08-22 22:20:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:51,297 INFO L225 Difference]: With dead ends: 279 [2020-08-22 22:20:51,297 INFO L226 Difference]: Without dead ends: 273 [2020-08-22 22:20:51,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:20:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-08-22 22:20:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 215. [2020-08-22 22:20:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-22 22:20:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions. [2020-08-22 22:20:51,340 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 56 [2020-08-22 22:20:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:51,343 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions. [2020-08-22 22:20:51,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:20:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions. [2020-08-22 22:20:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 22:20:51,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:51,344 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, 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, 1, 1] [2020-08-22 22:20:51,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:20:51,361 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash 593034583, now seen corresponding path program 1 times [2020-08-22 22:20:51,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:51,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013441519] [2020-08-22 22:20:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:51,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:20:51,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013441519] [2020-08-22 22:20:51,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:51,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 22:20:51,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241339828] [2020-08-22 22:20:51,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:20:51,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:20:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:20:51,450 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand 7 states. [2020-08-22 22:20:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:51,833 INFO L93 Difference]: Finished difference Result 282 states and 309 transitions. [2020-08-22 22:20:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:20:51,834 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-08-22 22:20:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:51,836 INFO L225 Difference]: With dead ends: 282 [2020-08-22 22:20:51,837 INFO L226 Difference]: Without dead ends: 267 [2020-08-22 22:20:51,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:20:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-08-22 22:20:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 212. [2020-08-22 22:20:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-22 22:20:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2020-08-22 22:20:51,855 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 62 [2020-08-22 22:20:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:51,856 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2020-08-22 22:20:51,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:20:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2020-08-22 22:20:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 22:20:51,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:51,857 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, 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, 1, 1] [2020-08-22 22:20:51,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:20:51,858 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1629716359, now seen corresponding path program 1 times [2020-08-22 22:20:51,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:51,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649657835] [2020-08-22 22:20:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:51,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:20:51,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649657835] [2020-08-22 22:20:51,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:51,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 22:20:51,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150478425] [2020-08-22 22:20:51,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:20:51,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:20:51,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:20:51,973 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand 7 states. [2020-08-22 22:20:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:52,342 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2020-08-22 22:20:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:20:52,342 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-08-22 22:20:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:52,344 INFO L225 Difference]: With dead ends: 264 [2020-08-22 22:20:52,344 INFO L226 Difference]: Without dead ends: 240 [2020-08-22 22:20:52,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:20:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-22 22:20:52,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 207. [2020-08-22 22:20:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-08-22 22:20:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2020-08-22 22:20:52,363 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 62 [2020-08-22 22:20:52,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:52,364 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2020-08-22 22:20:52,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:20:52,364 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2020-08-22 22:20:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 22:20:52,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:52,365 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:52,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:20:52,366 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:52,366 INFO L82 PathProgramCache]: Analyzing trace with hash 852438762, now seen corresponding path program 1 times [2020-08-22 22:20:52,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:52,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106413185] [2020-08-22 22:20:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:52,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:20:52,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106413185] [2020-08-22 22:20:52,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:52,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:20:52,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634901019] [2020-08-22 22:20:52,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:20:52,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:52,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:20:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:20:52,607 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand 15 states. [2020-08-22 22:20:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:53,517 INFO L93 Difference]: Finished difference Result 302 states and 330 transitions. [2020-08-22 22:20:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:20:53,518 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-08-22 22:20:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:53,520 INFO L225 Difference]: With dead ends: 302 [2020-08-22 22:20:53,521 INFO L226 Difference]: Without dead ends: 289 [2020-08-22 22:20:53,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:20:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-08-22 22:20:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 223. [2020-08-22 22:20:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-08-22 22:20:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 247 transitions. [2020-08-22 22:20:53,541 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 247 transitions. Word has length 67 [2020-08-22 22:20:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:53,543 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 247 transitions. [2020-08-22 22:20:53,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:20:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 247 transitions. [2020-08-22 22:20:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 22:20:53,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:53,544 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:53,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:20:53,544 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:53,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1742912072, now seen corresponding path program 1 times [2020-08-22 22:20:53,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:53,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977427422] [2020-08-22 22:20:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:53,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:20:53,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977427422] [2020-08-22 22:20:53,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:53,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:20:53,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000399803] [2020-08-22 22:20:53,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:20:53,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:53,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:20:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:20:53,832 INFO L87 Difference]: Start difference. First operand 223 states and 247 transitions. Second operand 15 states. [2020-08-22 22:20:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:54,850 INFO L93 Difference]: Finished difference Result 326 states and 357 transitions. [2020-08-22 22:20:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:20:54,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-08-22 22:20:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:54,853 INFO L225 Difference]: With dead ends: 326 [2020-08-22 22:20:54,853 INFO L226 Difference]: Without dead ends: 320 [2020-08-22 22:20:54,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:20:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-22 22:20:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 245. [2020-08-22 22:20:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-22 22:20:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 272 transitions. [2020-08-22 22:20:54,878 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 272 transitions. Word has length 67 [2020-08-22 22:20:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:54,879 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 272 transitions. [2020-08-22 22:20:54,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:20:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 272 transitions. [2020-08-22 22:20:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 22:20:54,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:54,881 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, 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, 1, 1, 1] [2020-08-22 22:20:54,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:20:54,883 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:54,883 INFO L82 PathProgramCache]: Analyzing trace with hash -838472334, now seen corresponding path program 1 times [2020-08-22 22:20:54,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:54,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979271323] [2020-08-22 22:20:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:55,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:20:55,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979271323] [2020-08-22 22:20:55,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:55,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:20:55,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080378158] [2020-08-22 22:20:55,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:20:55,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:20:55,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:20:55,375 INFO L87 Difference]: Start difference. First operand 245 states and 272 transitions. Second operand 17 states. [2020-08-22 22:20:56,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:56,765 INFO L93 Difference]: Finished difference Result 310 states and 340 transitions. [2020-08-22 22:20:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:20:56,766 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-08-22 22:20:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:56,768 INFO L225 Difference]: With dead ends: 310 [2020-08-22 22:20:56,768 INFO L226 Difference]: Without dead ends: 304 [2020-08-22 22:20:56,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 22:20:56,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-22 22:20:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 249. [2020-08-22 22:20:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-22 22:20:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 276 transitions. [2020-08-22 22:20:56,792 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 276 transitions. Word has length 73 [2020-08-22 22:20:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:56,792 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 276 transitions. [2020-08-22 22:20:56,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:20:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 276 transitions. [2020-08-22 22:20:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 22:20:56,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:56,794 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, 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, 1, 1, 1] [2020-08-22 22:20:56,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:20:56,794 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:56,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:56,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1654345840, now seen corresponding path program 1 times [2020-08-22 22:20:56,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:56,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599849945] [2020-08-22 22:20:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:57,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:20:57,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599849945] [2020-08-22 22:20:57,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:57,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:20:57,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108607137] [2020-08-22 22:20:57,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:20:57,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:57,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:20:57,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:20:57,170 INFO L87 Difference]: Start difference. First operand 249 states and 276 transitions. Second operand 17 states. [2020-08-22 22:20:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:58,792 INFO L93 Difference]: Finished difference Result 324 states and 354 transitions. [2020-08-22 22:20:58,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:20:58,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-08-22 22:20:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:58,796 INFO L225 Difference]: With dead ends: 324 [2020-08-22 22:20:58,796 INFO L226 Difference]: Without dead ends: 318 [2020-08-22 22:20:58,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 22:20:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-08-22 22:20:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 258. [2020-08-22 22:20:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 22:20:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 286 transitions. [2020-08-22 22:20:58,823 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 286 transitions. Word has length 73 [2020-08-22 22:20:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:58,824 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 286 transitions. [2020-08-22 22:20:58,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:20:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 286 transitions. [2020-08-22 22:20:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 22:20:58,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:58,825 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, 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, 1, 1, 1] [2020-08-22 22:20:58,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:20:58,826 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash -617664064, now seen corresponding path program 1 times [2020-08-22 22:20:58,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:58,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104740843] [2020-08-22 22:20:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:59,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:20:59,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104740843] [2020-08-22 22:20:59,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:59,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:20:59,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206103286] [2020-08-22 22:20:59,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:20:59,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:20:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:20:59,062 INFO L87 Difference]: Start difference. First operand 258 states and 286 transitions. Second operand 15 states. [2020-08-22 22:20:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:59,889 INFO L93 Difference]: Finished difference Result 341 states and 373 transitions. [2020-08-22 22:20:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:20:59,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-22 22:20:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:59,891 INFO L225 Difference]: With dead ends: 341 [2020-08-22 22:20:59,892 INFO L226 Difference]: Without dead ends: 322 [2020-08-22 22:20:59,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:20:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-22 22:20:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 258. [2020-08-22 22:20:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 22:20:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 285 transitions. [2020-08-22 22:20:59,917 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 285 transitions. Word has length 73 [2020-08-22 22:20:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:59,917 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 285 transitions. [2020-08-22 22:20:59,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:20:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 285 transitions. [2020-08-22 22:20:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 22:20:59,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:59,919 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-08-22 22:20:59,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:20:59,919 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:59,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash 342604767, now seen corresponding path program 2 times [2020-08-22 22:20:59,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:59,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653849071] [2020-08-22 22:20:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:00,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:00,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653849071] [2020-08-22 22:21:00,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:00,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:21:00,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831591105] [2020-08-22 22:21:00,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:21:00,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:00,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:21:00,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:21:00,366 INFO L87 Difference]: Start difference. First operand 258 states and 285 transitions. Second operand 22 states. [2020-08-22 22:21:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:02,188 INFO L93 Difference]: Finished difference Result 346 states and 378 transitions. [2020-08-22 22:21:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 22:21:02,188 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-08-22 22:21:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:02,191 INFO L225 Difference]: With dead ends: 346 [2020-08-22 22:21:02,191 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 22:21:02,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 22:21:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 22:21:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 283. [2020-08-22 22:21:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-08-22 22:21:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2020-08-22 22:21:02,221 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 78 [2020-08-22 22:21:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:02,221 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2020-08-22 22:21:02,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:21:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2020-08-22 22:21:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 22:21:02,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:02,223 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:02,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:21:02,223 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:02,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:02,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1736898641, now seen corresponding path program 1 times [2020-08-22 22:21:02,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:02,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979345082] [2020-08-22 22:21:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:02,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:02,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979345082] [2020-08-22 22:21:02,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:02,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:21:02,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703094268] [2020-08-22 22:21:02,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:21:02,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:02,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:21:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:21:02,624 INFO L87 Difference]: Start difference. First operand 283 states and 312 transitions. Second operand 22 states. [2020-08-22 22:21:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:04,541 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2020-08-22 22:21:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 22:21:04,541 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-08-22 22:21:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:04,544 INFO L225 Difference]: With dead ends: 383 [2020-08-22 22:21:04,544 INFO L226 Difference]: Without dead ends: 377 [2020-08-22 22:21:04,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 22:21:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-22 22:21:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 295. [2020-08-22 22:21:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-08-22 22:21:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 325 transitions. [2020-08-22 22:21:04,577 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 325 transitions. Word has length 78 [2020-08-22 22:21:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:04,577 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 325 transitions. [2020-08-22 22:21:04,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:21:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 325 transitions. [2020-08-22 22:21:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 22:21:04,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:04,579 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:04,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:21:04,579 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:04,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1698374602, now seen corresponding path program 1 times [2020-08-22 22:21:04,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:04,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291193870] [2020-08-22 22:21:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:04,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:05,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291193870] [2020-08-22 22:21:05,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:05,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:21:05,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082432545] [2020-08-22 22:21:05,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:21:05,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:21:05,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:21:05,016 INFO L87 Difference]: Start difference. First operand 295 states and 325 transitions. Second operand 17 states. [2020-08-22 22:21:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:06,253 INFO L93 Difference]: Finished difference Result 353 states and 386 transitions. [2020-08-22 22:21:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:21:06,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-08-22 22:21:06,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:06,256 INFO L225 Difference]: With dead ends: 353 [2020-08-22 22:21:06,256 INFO L226 Difference]: Without dead ends: 338 [2020-08-22 22:21:06,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 22:21:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-08-22 22:21:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 297. [2020-08-22 22:21:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-08-22 22:21:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 327 transitions. [2020-08-22 22:21:06,289 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 327 transitions. Word has length 79 [2020-08-22 22:21:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:06,289 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 327 transitions. [2020-08-22 22:21:06,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:21:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 327 transitions. [2020-08-22 22:21:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 22:21:06,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:06,290 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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, 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, 1, 1, 1] [2020-08-22 22:21:06,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:21:06,291 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1559910918, now seen corresponding path program 2 times [2020-08-22 22:21:06,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:06,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168856143] [2020-08-22 22:21:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:06,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:06,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168856143] [2020-08-22 22:21:06,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:06,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:21:06,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698093309] [2020-08-22 22:21:06,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:21:06,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:21:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:21:06,638 INFO L87 Difference]: Start difference. First operand 297 states and 327 transitions. Second operand 17 states. [2020-08-22 22:21:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:07,852 INFO L93 Difference]: Finished difference Result 335 states and 367 transitions. [2020-08-22 22:21:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:21:07,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-08-22 22:21:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:07,854 INFO L225 Difference]: With dead ends: 335 [2020-08-22 22:21:07,854 INFO L226 Difference]: Without dead ends: 305 [2020-08-22 22:21:07,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 22:21:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-22 22:21:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 286. [2020-08-22 22:21:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 22:21:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 315 transitions. [2020-08-22 22:21:07,885 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 315 transitions. Word has length 79 [2020-08-22 22:21:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:07,886 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 315 transitions. [2020-08-22 22:21:07,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:21:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 315 transitions. [2020-08-22 22:21:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 22:21:07,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:07,888 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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, 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, 1, 1, 1] [2020-08-22 22:21:07,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:21:07,888 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:07,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1643861864, now seen corresponding path program 2 times [2020-08-22 22:21:07,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:07,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144030656] [2020-08-22 22:21:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:08,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:08,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144030656] [2020-08-22 22:21:08,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:08,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:21:08,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24715771] [2020-08-22 22:21:08,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:21:08,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:08,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:21:08,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:21:08,254 INFO L87 Difference]: Start difference. First operand 286 states and 315 transitions. Second operand 17 states. [2020-08-22 22:21:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:09,474 INFO L93 Difference]: Finished difference Result 325 states and 355 transitions. [2020-08-22 22:21:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:21:09,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-08-22 22:21:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:09,476 INFO L225 Difference]: With dead ends: 325 [2020-08-22 22:21:09,476 INFO L226 Difference]: Without dead ends: 299 [2020-08-22 22:21:09,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 22:21:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-08-22 22:21:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 274. [2020-08-22 22:21:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-22 22:21:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 302 transitions. [2020-08-22 22:21:09,504 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 302 transitions. Word has length 79 [2020-08-22 22:21:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:09,505 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 302 transitions. [2020-08-22 22:21:09,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:21:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 302 transitions. [2020-08-22 22:21:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 22:21:09,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:09,506 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-08-22 22:21:09,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:21:09,507 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:09,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:09,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1435872375, now seen corresponding path program 1 times [2020-08-22 22:21:09,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:09,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956121786] [2020-08-22 22:21:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:09,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:09,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956121786] [2020-08-22 22:21:09,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:09,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:21:09,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003385243] [2020-08-22 22:21:09,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:21:09,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:09,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:21:09,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:21:09,918 INFO L87 Difference]: Start difference. First operand 274 states and 302 transitions. Second operand 22 states. [2020-08-22 22:21:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:11,686 INFO L93 Difference]: Finished difference Result 352 states and 384 transitions. [2020-08-22 22:21:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 22:21:11,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-08-22 22:21:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:11,688 INFO L225 Difference]: With dead ends: 352 [2020-08-22 22:21:11,688 INFO L226 Difference]: Without dead ends: 337 [2020-08-22 22:21:11,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 22:21:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-08-22 22:21:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2020-08-22 22:21:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-08-22 22:21:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 319 transitions. [2020-08-22 22:21:11,721 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 319 transitions. Word has length 84 [2020-08-22 22:21:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:11,722 INFO L479 AbstractCegarLoop]: Abstraction has 290 states and 319 transitions. [2020-08-22 22:21:11,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:21:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 319 transitions. [2020-08-22 22:21:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 22:21:11,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:11,723 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-08-22 22:21:11,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:21:11,724 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:11,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1822413145, now seen corresponding path program 3 times [2020-08-22 22:21:11,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:11,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311072129] [2020-08-22 22:21:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:12,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:12,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311072129] [2020-08-22 22:21:12,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:12,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 22:21:12,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281327972] [2020-08-22 22:21:12,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 22:21:12,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:12,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 22:21:12,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-08-22 22:21:12,543 INFO L87 Difference]: Start difference. First operand 290 states and 319 transitions. Second operand 25 states. [2020-08-22 22:21:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:15,546 INFO L93 Difference]: Finished difference Result 353 states and 385 transitions. [2020-08-22 22:21:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 22:21:15,551 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 84 [2020-08-22 22:21:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:15,553 INFO L225 Difference]: With dead ends: 353 [2020-08-22 22:21:15,553 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 22:21:15,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=521, Invalid=2785, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 22:21:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 22:21:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 299. [2020-08-22 22:21:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-08-22 22:21:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 328 transitions. [2020-08-22 22:21:15,591 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 328 transitions. Word has length 84 [2020-08-22 22:21:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:15,591 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 328 transitions. [2020-08-22 22:21:15,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 22:21:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 328 transitions. [2020-08-22 22:21:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 22:21:15,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:15,594 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:15,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 22:21:15,594 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:15,595 INFO L82 PathProgramCache]: Analyzing trace with hash 752503657, now seen corresponding path program 1 times [2020-08-22 22:21:15,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:15,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569432898] [2020-08-22 22:21:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:21:15,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:21:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:21:15,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:21:15,675 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:21:15,675 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:21:15,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 22:21:15,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:21:15 BoogieIcfgContainer [2020-08-22 22:21:15,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:21:15,756 INFO L168 Benchmark]: Toolchain (without parser) took 28308.74 ms. Allocated memory was 139.5 MB in the beginning and 532.2 MB in the end (delta: 392.7 MB). Free memory was 101.0 MB in the beginning and 409.9 MB in the end (delta: -308.9 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:15,757 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 120.8 MB in the beginning and 120.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 22:21:15,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 574.92 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 100.6 MB in the beginning and 168.3 MB in the end (delta: -67.7 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:15,759 INFO L168 Benchmark]: Boogie Preprocessor took 67.14 ms. Allocated memory is still 203.4 MB. Free memory was 168.3 MB in the beginning and 165.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:15,759 INFO L168 Benchmark]: RCFGBuilder took 810.85 ms. Allocated memory is still 203.4 MB. Free memory was 165.3 MB in the beginning and 98.2 MB in the end (delta: 67.0 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:15,760 INFO L168 Benchmark]: TraceAbstraction took 26849.14 ms. Allocated memory was 203.4 MB in the beginning and 532.2 MB in the end (delta: 328.7 MB). Free memory was 98.2 MB in the beginning and 409.9 MB in the end (delta: -311.6 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:15,765 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 120.8 MB in the beginning and 120.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 574.92 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 100.6 MB in the beginning and 168.3 MB in the end (delta: -67.7 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.14 ms. Allocated memory is still 203.4 MB. Free memory was 168.3 MB in the beginning and 165.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 810.85 ms. Allocated memory is still 203.4 MB. Free memory was 165.3 MB in the beginning and 98.2 MB in the end (delta: 67.0 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26849.14 ms. Allocated memory was 203.4 MB in the beginning and 532.2 MB in the end (delta: 328.7 MB). Free memory was 98.2 MB in the beginning and 409.9 MB in the end (delta: -311.6 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; VAL [malloc(sizeof(*root))={-1:0}, root={-1:0}] [L542] root->left = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, root={-1:0}] [L543] root->right = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, root={-1:0}] [L544] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, malloc(sizeof(*root))={-1:0}, root={-1:0}] [L563] n = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, n={0:0}, root={-1:0}] [L564] struct TreeNode* pred; VAL [malloc(sizeof(*root))={-1:0}, n={0:0}, root={-1:0}] [L565] COND TRUE \read(*root) VAL [malloc(sizeof(*root))={-1:0}, n={0:0}, root={-1:0}] [L566] pred = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, n={0:0}, pred={0:0}, root={-1:0}] [L567] n = root VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={-1:0}] [L568] EXPR n->left VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, pred={0:0}, root={-1:0}] [L568] n->left || n->right VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, n->left || n->right=0, pred={0:0}, root={-1:0}] [L568] EXPR n->right VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, n->left || n->right=0, n->right={0:0}, pred={0:0}, root={-1:0}] [L568] n->left || n->right VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, n->left || n->right=0, n->right={0:0}, pred={0:0}, root={-1:0}] [L568] COND FALSE !(n->left || n->right) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, n->left || n->right=0, n->right={0:0}, pred={0:0}, root={-1:0}] [L575] COND FALSE !(\read(*pred)) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={-1:0}] [L581] root = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={0:0}] [L565] COND FALSE !(\read(*root)) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={0:0}] [L584] List a = (List) malloc(sizeof(struct node)); VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, pred={0:0}, root={0:0}] [L585] COND FALSE !(a == 0) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, pred={0:0}, root={0:0}] [L586] List t; VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, pred={0:0}, root={0:0}] [L587] List p = a; VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}] [L588] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}] [L589] p->h = 1 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}] [L590] t = (List) malloc(sizeof(struct node)) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-3:0}] [L591] COND FALSE !(t == 0) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-3:0}] [L592] p->n = t VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-3:0}] [L593] EXPR p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, p->n={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L593] p = p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, p->n={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L588] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L595] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L596] p->h = 2 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L597] t = (List) malloc(sizeof(struct node)) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L598] COND FALSE !(t == 0) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L599] p->n = t VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L600] EXPR p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, p->n={-4:0}, pred={0:0}, root={0:0}, t={-4:0}] [L600] p = p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-4:0}, p->n={-4:0}, pred={0:0}, root={0:0}, t={-4:0}] [L595] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-4:0}, pred={0:0}, root={0:0}, t={-4:0}] [L602] p->h = 3 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-4:0}, pred={0:0}, root={0:0}, t={-4:0}] [L603] p = a VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-4:0}] [L604] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L604] COND FALSE !(p->h == 2) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L606] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L606] COND TRUE p->h == 1 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L607] EXPR p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, p->n={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L607] p = p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, p->n={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L606] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L606] COND FALSE !(p->h == 1) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L608] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L608] COND TRUE p->h != 3 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L609] __VERIFIER_error() VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 188 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26.7s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 20.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3258 SDtfs, 5761 SDslu, 24558 SDs, 0 SdLazy, 10836 SolverSat, 770 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 542 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 12.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=299occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 779 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 1304 NumberOfCodeBlocks, 1304 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1202 ConstructedInterpolants, 0 QuantifiedInterpolants, 559211 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 42/119 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...