/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:21:51,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:21:51,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:21:51,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:21:51,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:21:51,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:21:51,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:21:51,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:21:51,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:21:51,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:21:51,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:21:51,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:21:51,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:21:51,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:21:51,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:21:51,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:21:51,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:21:51,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:21:51,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:21:51,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:21:51,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:21:51,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:21:51,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:21:51,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:21:51,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:21:51,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:21:51,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:21:51,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:21:51,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:21:51,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:21:51,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:21:51,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:21:51,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:21:51,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:21:51,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:21:51,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:21:51,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:21:51,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:21:51,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:21:51,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:21:51,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:21:51,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:21:51,349 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:21:51,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:21:51,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:21:51,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:21:51,351 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:21:51,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:21:51,351 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:21:51,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:21:51,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:21:51,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:21:51,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:21:51,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:21:51,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:21:51,355 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:21:51,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:21:51,356 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:21:51,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:21:51,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:21:51,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:21:51,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:21:51,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:21:51,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:21:51,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:21:51,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:21:51,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:21:51,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:21:51,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:21:51,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:21:51,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:21:51,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 11:21:51,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:21:51,699 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:21:51,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:21:51,709 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:21:51,710 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:21:51,710 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-08-18 11:21:51,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/685731dd9/b9309348efea476290d6f96acbbbea06/FLAG5a40df766 [2020-08-18 11:21:52,317 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:21:52,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-08-18 11:21:52,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/685731dd9/b9309348efea476290d6f96acbbbea06/FLAG5a40df766 [2020-08-18 11:21:52,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/685731dd9/b9309348efea476290d6f96acbbbea06 [2020-08-18 11:21:52,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:21:52,550 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:21:52,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:21:52,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:21:52,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:21:52,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:21:52" (1/1) ... [2020-08-18 11:21:52,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e52fa5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:52, skipping insertion in model container [2020-08-18 11:21:52,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:21:52" (1/1) ... [2020-08-18 11:21:52,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:21:52,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:21:53,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:21:53,048 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:21:53,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:21:53,158 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:21:53,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53 WrapperNode [2020-08-18 11:21:53,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:21:53,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:21:53,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:21:53,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:21:53,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53" (1/1) ... [2020-08-18 11:21:53,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53" (1/1) ... [2020-08-18 11:21:53,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53" (1/1) ... [2020-08-18 11:21:53,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53" (1/1) ... [2020-08-18 11:21:53,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53" (1/1) ... [2020-08-18 11:21:53,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53" (1/1) ... [2020-08-18 11:21:53,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53" (1/1) ... [2020-08-18 11:21:53,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:21:53,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:21:53,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:21:53,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:21:53,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 11:21:53,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:21:53,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:21:53,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:21:53,285 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 11:21:53,285 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 11:21:53,285 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 11:21:53,285 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 11:21:53,285 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 11:21:53,286 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 11:21:53,286 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 11:21:53,286 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 11:21:53,286 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 11:21:53,286 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 11:21:53,286 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 11:21:53,287 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 11:21:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 11:21:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 11:21:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 11:21:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 11:21:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 11:21:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 11:21:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 11:21:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 11:21:53,294 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 11:21:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 11:21:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 11:21:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 11:21:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 11:21:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 11:21:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 11:21:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 11:21:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 11:21:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 11:21:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 11:21:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 11:21:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 11:21:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 11:21:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 11:21:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 11:21:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 11:21:53,298 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 11:21:53,299 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 11:21:53,299 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 11:21:53,299 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 11:21:53,299 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 11:21:53,299 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 11:21:53,299 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 11:21:53,299 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 11:21:53,299 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 11:21:53,299 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 11:21:53,300 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 11:21:53,300 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 11:21:53,300 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 11:21:53,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 11:21:53,300 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 11:21:53,300 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 11:21:53,300 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 11:21:53,300 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 11:21:53,301 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 11:21:53,301 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 11:21:53,301 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 11:21:53,301 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 11:21:53,301 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 11:21:53,301 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 11:21:53,302 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 11:21:53,302 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 11:21:53,302 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 11:21:53,302 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 11:21:53,302 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 11:21:53,302 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 11:21:53,302 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 11:21:53,303 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 11:21:53,303 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 11:21:53,303 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 11:21:53,303 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 11:21:53,303 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 11:21:53,303 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 11:21:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 11:21:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 11:21:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 11:21:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 11:21:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 11:21:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 11:21:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 11:21:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 11:21:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 11:21:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 11:21:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 11:21:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 11:21:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 11:21:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 11:21:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 11:21:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 11:21:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 11:21:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 11:21:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 11:21:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 11:21:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:21:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:21:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:21:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 11:21:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 11:21:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:21:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 11:21:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:21:53,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:21:53,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:21:53,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:21:54,005 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:21:54,005 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-08-18 11:21:54,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:21:54 BoogieIcfgContainer [2020-08-18 11:21:54,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:21:54,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:21:54,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:21:54,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:21:54,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:21:52" (1/3) ... [2020-08-18 11:21:54,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7f6d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:21:54, skipping insertion in model container [2020-08-18 11:21:54,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:21:53" (2/3) ... [2020-08-18 11:21:54,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7f6d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:21:54, skipping insertion in model container [2020-08-18 11:21:54,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:21:54" (3/3) ... [2020-08-18 11:21:54,029 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-08-18 11:21:54,040 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:21:54,048 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-08-18 11:21:54,063 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-08-18 11:21:54,089 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:21:54,089 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:21:54,089 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:21:54,089 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:21:54,090 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:21:54,090 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:21:54,090 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:21:54,090 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:21:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-08-18 11:21:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 11:21:54,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:54,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:54,118 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:54,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1255802584, now seen corresponding path program 1 times [2020-08-18 11:21:54,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:54,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443508699] [2020-08-18 11:21:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:54,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:54,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443508699] [2020-08-18 11:21:54,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:54,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 11:21:54,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776486665] [2020-08-18 11:21:54,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 11:21:54,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:54,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 11:21:54,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:21:54,370 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-08-18 11:21:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:54,552 INFO L93 Difference]: Finished difference Result 98 states and 156 transitions. [2020-08-18 11:21:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:21:54,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-18 11:21:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:54,564 INFO L225 Difference]: With dead ends: 98 [2020-08-18 11:21:54,564 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 11:21:54,568 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 [2020-08-18 11:21:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 11:21:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 11:21:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 11:21:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-08-18 11:21:54,609 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 10 [2020-08-18 11:21:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:54,609 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-08-18 11:21:54,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 11:21:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-08-18 11:21:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 11:21:54,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:54,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:54,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:21:54,612 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:54,612 INFO L82 PathProgramCache]: Analyzing trace with hash -338068956, now seen corresponding path program 1 times [2020-08-18 11:21:54,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:54,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644493246] [2020-08-18 11:21:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:54,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:54,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644493246] [2020-08-18 11:21:54,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:54,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:21:54,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058134405] [2020-08-18 11:21:54,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:21:54,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:54,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:21:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:21:54,723 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 5 states. [2020-08-18 11:21:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:54,910 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-08-18 11:21:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:21:54,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-18 11:21:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:54,913 INFO L225 Difference]: With dead ends: 51 [2020-08-18 11:21:54,913 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 11:21:54,914 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 [2020-08-18 11:21:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 11:21:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-18 11:21:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 11:21:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-08-18 11:21:54,922 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 11 [2020-08-18 11:21:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:54,923 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-08-18 11:21:54,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:21:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-08-18 11:21:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 11:21:54,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:54,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:54,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:21:54,925 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:54,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:54,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1890143313, now seen corresponding path program 1 times [2020-08-18 11:21:54,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:54,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558968571] [2020-08-18 11:21:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:55,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:55,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558968571] [2020-08-18 11:21:55,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:55,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:21:55,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447529163] [2020-08-18 11:21:55,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:21:55,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:55,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:21:55,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:21:55,074 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 5 states. [2020-08-18 11:21:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:55,227 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-08-18 11:21:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:21:55,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-18 11:21:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:55,228 INFO L225 Difference]: With dead ends: 43 [2020-08-18 11:21:55,229 INFO L226 Difference]: Without dead ends: 41 [2020-08-18 11:21:55,229 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 [2020-08-18 11:21:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-18 11:21:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-18 11:21:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 11:21:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-08-18 11:21:55,236 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 12 [2020-08-18 11:21:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:55,237 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-08-18 11:21:55,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:21:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-08-18 11:21:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 11:21:55,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:55,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:55,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:21:55,239 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:55,239 INFO L82 PathProgramCache]: Analyzing trace with hash 290038970, now seen corresponding path program 1 times [2020-08-18 11:21:55,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:55,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163309454] [2020-08-18 11:21:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:55,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:55,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163309454] [2020-08-18 11:21:55,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:55,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:21:55,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326960363] [2020-08-18 11:21:55,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:21:55,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:21:55,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:21:55,355 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2020-08-18 11:21:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:55,614 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-08-18 11:21:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 11:21:55,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-18 11:21:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:55,616 INFO L225 Difference]: With dead ends: 66 [2020-08-18 11:21:55,616 INFO L226 Difference]: Without dead ends: 64 [2020-08-18 11:21:55,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:21:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-18 11:21:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-08-18 11:21:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 11:21:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-08-18 11:21:55,625 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 14 [2020-08-18 11:21:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:55,625 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-08-18 11:21:55,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:21:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-08-18 11:21:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 11:21:55,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:55,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:55,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:21:55,627 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:55,627 INFO L82 PathProgramCache]: Analyzing trace with hash 2060721718, now seen corresponding path program 1 times [2020-08-18 11:21:55,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:55,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666349484] [2020-08-18 11:21:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:55,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:55,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666349484] [2020-08-18 11:21:55,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:55,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:21:55,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397227327] [2020-08-18 11:21:55,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:21:55,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:55,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:21:55,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:21:55,734 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 5 states. [2020-08-18 11:21:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:55,927 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-18 11:21:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:21:55,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-18 11:21:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:55,928 INFO L225 Difference]: With dead ends: 48 [2020-08-18 11:21:55,929 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 11:21:55,929 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 [2020-08-18 11:21:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 11:21:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-18 11:21:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 11:21:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-18 11:21:55,937 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 15 [2020-08-18 11:21:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:55,937 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-18 11:21:55,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:21:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-18 11:21:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 11:21:55,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:55,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:55,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:21:55,939 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash 373775322, now seen corresponding path program 1 times [2020-08-18 11:21:55,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:55,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195321950] [2020-08-18 11:21:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:56,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:56,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195321950] [2020-08-18 11:21:56,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:56,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:21:56,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355604572] [2020-08-18 11:21:56,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:21:56,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:56,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:21:56,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:21:56,066 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-08-18 11:21:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:56,227 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-18 11:21:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:21:56,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-18 11:21:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:56,229 INFO L225 Difference]: With dead ends: 46 [2020-08-18 11:21:56,229 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 11:21:56,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:21:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 11:21:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-18 11:21:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 11:21:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-08-18 11:21:56,242 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-08-18 11:21:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:56,243 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-08-18 11:21:56,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:21:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-08-18 11:21:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 11:21:56,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:56,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:56,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:21:56,244 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1568846049, now seen corresponding path program 1 times [2020-08-18 11:21:56,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:56,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446093994] [2020-08-18 11:21:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:56,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:56,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446093994] [2020-08-18 11:21:56,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:21:56,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:21:56,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891991156] [2020-08-18 11:21:56,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:21:56,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:56,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:21:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:21:56,411 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2020-08-18 11:21:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:56,630 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-08-18 11:21:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:21:56,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-18 11:21:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:56,632 INFO L225 Difference]: With dead ends: 59 [2020-08-18 11:21:56,632 INFO L226 Difference]: Without dead ends: 47 [2020-08-18 11:21:56,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:21:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-18 11:21:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-08-18 11:21:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 11:21:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-18 11:21:56,642 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 18 [2020-08-18 11:21:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:56,642 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-18 11:21:56,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:21:56,643 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-18 11:21:56,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 11:21:56,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:56,644 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:56,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:21:56,644 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:56,644 INFO L82 PathProgramCache]: Analyzing trace with hash 777661568, now seen corresponding path program 1 times [2020-08-18 11:21:56,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:56,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994610679] [2020-08-18 11:21:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:56,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:56,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994610679] [2020-08-18 11:21:56,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:56,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 11:21:56,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940488892] [2020-08-18 11:21:56,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:21:56,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:56,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:21:56,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:21:56,718 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-08-18 11:21:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:56,979 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-08-18 11:21:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:21:56,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-08-18 11:21:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:56,980 INFO L225 Difference]: With dead ends: 63 [2020-08-18 11:21:56,980 INFO L226 Difference]: Without dead ends: 41 [2020-08-18 11:21:56,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:21:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-18 11:21:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-18 11:21:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 11:21:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-08-18 11:21:56,986 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 21 [2020-08-18 11:21:56,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:56,986 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-08-18 11:21:56,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:21:56,986 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-08-18 11:21:56,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 11:21:56,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:56,987 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] [2020-08-18 11:21:56,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:21:56,987 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1056872398, now seen corresponding path program 1 times [2020-08-18 11:21:56,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:56,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470987907] [2020-08-18 11:21:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:57,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:57,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470987907] [2020-08-18 11:21:57,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:57,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 11:21:57,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983038380] [2020-08-18 11:21:57,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:21:57,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:21:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:21:57,157 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 8 states. [2020-08-18 11:21:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:57,456 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-08-18 11:21:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:21:57,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-18 11:21:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:57,457 INFO L225 Difference]: With dead ends: 42 [2020-08-18 11:21:57,457 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 11:21:57,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:21:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 11:21:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-18 11:21:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 11:21:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-08-18 11:21:57,468 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2020-08-18 11:21:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:57,470 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-08-18 11:21:57,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:21:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-08-18 11:21:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 11:21:57,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:57,472 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] [2020-08-18 11:21:57,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:21:57,472 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:57,472 INFO L82 PathProgramCache]: Analyzing trace with hash -377613816, now seen corresponding path program 1 times [2020-08-18 11:21:57,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:57,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589222445] [2020-08-18 11:21:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:57,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:57,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589222445] [2020-08-18 11:21:57,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:57,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:21:57,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051588405] [2020-08-18 11:21:57,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:21:57,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:21:57,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:21:57,783 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 10 states. [2020-08-18 11:21:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:58,419 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-08-18 11:21:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 11:21:58,420 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-08-18 11:21:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:58,421 INFO L225 Difference]: With dead ends: 120 [2020-08-18 11:21:58,422 INFO L226 Difference]: Without dead ends: 118 [2020-08-18 11:21:58,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-08-18 11:21:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-18 11:21:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 62. [2020-08-18 11:21:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 11:21:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-08-18 11:21:58,430 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 32 [2020-08-18 11:21:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:58,430 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-08-18 11:21:58,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:21:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-08-18 11:21:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 11:21:58,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:58,432 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] [2020-08-18 11:21:58,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:21:58,432 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:58,432 INFO L82 PathProgramCache]: Analyzing trace with hash -243600310, now seen corresponding path program 1 times [2020-08-18 11:21:58,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:58,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498736418] [2020-08-18 11:21:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:58,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:58,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498736418] [2020-08-18 11:21:58,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:58,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 11:21:58,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650689915] [2020-08-18 11:21:58,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 11:21:58,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:58,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 11:21:58,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:21:58,772 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 13 states. [2020-08-18 11:21:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:21:59,551 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-08-18 11:21:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 11:21:59,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-08-18 11:21:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:21:59,554 INFO L225 Difference]: With dead ends: 108 [2020-08-18 11:21:59,554 INFO L226 Difference]: Without dead ends: 96 [2020-08-18 11:21:59,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-08-18 11:21:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-18 11:21:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-08-18 11:21:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 11:21:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-08-18 11:21:59,564 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 32 [2020-08-18 11:21:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:21:59,565 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-08-18 11:21:59,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 11:21:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-08-18 11:21:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 11:21:59,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:21:59,566 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:21:59,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:21:59,567 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:21:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:21:59,567 INFO L82 PathProgramCache]: Analyzing trace with hash 145286649, now seen corresponding path program 2 times [2020-08-18 11:21:59,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:21:59,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052575655] [2020-08-18 11:21:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:21:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:59,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:21:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:21:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:21:59,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052575655] [2020-08-18 11:21:59,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:21:59,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:21:59,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298901528] [2020-08-18 11:21:59,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:21:59,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:21:59,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:21:59,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:21:59,853 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 10 states. [2020-08-18 11:22:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:22:00,570 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-08-18 11:22:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 11:22:00,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-08-18 11:22:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:22:00,571 INFO L225 Difference]: With dead ends: 118 [2020-08-18 11:22:00,571 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 11:22:00,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:22:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 11:22:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2020-08-18 11:22:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 11:22:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-08-18 11:22:00,580 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 35 [2020-08-18 11:22:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:22:00,580 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-08-18 11:22:00,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:22:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-08-18 11:22:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 11:22:00,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:22:00,582 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] [2020-08-18 11:22:00,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 11:22:00,583 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:22:00,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:22:00,583 INFO L82 PathProgramCache]: Analyzing trace with hash -969799515, now seen corresponding path program 1 times [2020-08-18 11:22:00,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:22:00,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549309151] [2020-08-18 11:22:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:22:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:22:00,634 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:22:00,635 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:22:00,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 11:22:00,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:22:00 BoogieIcfgContainer [2020-08-18 11:22:00,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:22:00,661 INFO L168 Benchmark]: Toolchain (without parser) took 8110.69 ms. Allocated memory was 140.0 MB in the beginning and 284.2 MB in the end (delta: 144.2 MB). Free memory was 102.2 MB in the beginning and 159.7 MB in the end (delta: -57.5 MB). Peak memory consumption was 86.7 MB. Max. memory is 7.1 GB. [2020-08-18 11:22:00,662 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 11:22:00,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 608.56 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 171.6 MB in the end (delta: -69.6 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:22:00,664 INFO L168 Benchmark]: Boogie Preprocessor took 69.02 ms. Allocated memory is still 203.9 MB. Free memory was 171.6 MB in the beginning and 167.8 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-08-18 11:22:00,664 INFO L168 Benchmark]: RCFGBuilder took 788.48 ms. Allocated memory is still 203.9 MB. Free memory was 167.8 MB in the beginning and 115.6 MB in the end (delta: 52.3 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. [2020-08-18 11:22:00,665 INFO L168 Benchmark]: TraceAbstraction took 6638.24 ms. Allocated memory was 203.9 MB in the beginning and 284.2 MB in the end (delta: 80.2 MB). Free memory was 115.6 MB in the beginning and 159.7 MB in the end (delta: -44.1 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:22:00,668 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 608.56 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 171.6 MB in the end (delta: -69.6 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.02 ms. Allocated memory is still 203.9 MB. Free memory was 171.6 MB in the beginning and 167.8 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 788.48 ms. Allocated memory is still 203.9 MB. Free memory was 167.8 MB in the beginning and 115.6 MB in the end (delta: 52.3 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6638.24 ms. Allocated memory was 203.9 MB in the beginning and 284.2 MB in the end (delta: 80.2 MB). Free memory was 115.6 MB in the beginning and 159.7 MB in the end (delta: -44.1 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L987] struct TSLL* null = malloc(sizeof(struct TSLL)); [L988] null->next = ((void*)0) [L989] null->prev = ((void*)0) [L990] null->colour = BLACK [L992] struct TSLL* list = malloc(sizeof(struct TSLL)); [L993] list->next = null [L994] list->prev = null [L995] list->colour = BLACK [L997] struct TSLL* end = list; [L1000] COND TRUE __VERIFIER_nondet_int() [L1003] end->next = malloc(sizeof(struct TSLL)) [L1004] EXPR end->next [L1004] end->next->prev = end [L1005] EXPR end->next [L1005] end = end->next [L1006] end->next = null [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1014] end->colour = RED [L1015] end->next = malloc(sizeof(struct TSLL)) [L1016] EXPR end->next [L1016] end->next->prev = end [L1017] EXPR end->next [L1017] end = end->next [L1018] end->next = null [L1019] end->colour = BLACK [L1021] EXPR end->colour [L1021] COND FALSE !(!(BLACK == end->colour)) [L1022] EXPR end->next [L1022] COND FALSE !(!(null == end->next)) [L1023] COND FALSE !(!(null != end)) [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND FALSE !(!(BLACK == end->colour)) [L1032] COND TRUE null != end [L1034] EXPR end->colour [L1034] COND FALSE !(RED == end->colour) [L1041] EXPR end->next [L1041] end = end->next [L1032] COND TRUE null != end [L1034] EXPR end->colour [L1034] COND TRUE RED == end->colour [L1036] EXPR end->next [L1036] end = end->next [L1037] COND FALSE !(!(null != end)) [L1038] EXPR end->colour [L1038] COND TRUE !(BLACK != end->colour) [L1038] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.5s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 407 SDtfs, 469 SDslu, 1103 SDs, 0 SdLazy, 1629 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 120 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 277 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 84053 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 7 PerfectInterpolantSequences, 1/21 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...