/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 --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:15:31,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:15:31,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:15:31,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:15:31,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:15:31,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:15:31,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:15:31,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:15:31,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:15:31,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:15:31,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:15:31,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:15:31,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:15:31,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:15:31,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:15:31,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:15:31,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:15:31,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:15:31,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:15:31,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:15:31,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:15:31,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:15:31,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:15:31,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:15:31,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 02:15:31,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 02:15:31,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 02:15:31,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 02:15:31,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 02:15:31,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 02:15:31,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 02:15:31,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 02:15:31,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 02:15:31,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 02:15:31,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 02:15:31,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 02:15:31,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 02:15:31,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 02:15:31,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:15:31,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:15:31,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:15:31,298 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 [2020-08-22 02:15:31,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:15:31,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:15:31,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:15:31,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:15:31,324 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:15:31,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:15:31,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:15:31,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:15:31,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:15:31,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:15:31,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:15:31,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:15:31,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:15:31,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:15:31,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:15:31,327 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:15:31,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:15:31,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:15:31,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:15:31,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:15:31,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:15:31,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:15:31,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:15:31,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:15:31,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:15:31,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:15:31,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:15:31,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:15:31,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:15:31,329 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:15:31,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:15:31,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:15:31,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:15:31,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:15:31,671 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:15:31,671 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-08-22 02:15:31,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a44058e1/d4050a50b68749049e9ad06172a79520/FLAGe00120a22 [2020-08-22 02:15:32,251 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:15:32,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-08-22 02:15:32,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a44058e1/d4050a50b68749049e9ad06172a79520/FLAGe00120a22 [2020-08-22 02:15:32,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a44058e1/d4050a50b68749049e9ad06172a79520 [2020-08-22 02:15:32,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:15:32,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:15:32,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:15:32,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:15:32,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:15:32,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:15:32" (1/1) ... [2020-08-22 02:15:32,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce1ddb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:32, skipping insertion in model container [2020-08-22 02:15:32,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:15:32" (1/1) ... [2020-08-22 02:15:32,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:15:32,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:15:33,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:15:33,147 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:15:33,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:15:33,265 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:15:33,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33 WrapperNode [2020-08-22 02:15:33,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:15:33,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:15:33,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:15:33,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:15:33,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33" (1/1) ... [2020-08-22 02:15:33,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33" (1/1) ... [2020-08-22 02:15:33,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33" (1/1) ... [2020-08-22 02:15:33,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33" (1/1) ... [2020-08-22 02:15:33,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33" (1/1) ... [2020-08-22 02:15:33,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33" (1/1) ... [2020-08-22 02:15:33,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33" (1/1) ... [2020-08-22 02:15:33,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:15:33,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:15:33,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:15:33,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:15:33,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33" (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 [2020-08-22 02:15:33,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:15:33,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:15:33,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:15:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 02:15:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 02:15:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 02:15:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 02:15:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 02:15:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 02:15:33,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 02:15:33,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 02:15:33,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 02:15:33,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 02:15:33,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 02:15:33,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 02:15:33,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 02:15:33,419 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 02:15:33,419 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 02:15:33,419 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 02:15:33,419 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 02:15:33,419 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 02:15:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 02:15:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 02:15:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 02:15:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 02:15:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 02:15:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 02:15:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 02:15:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 02:15:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 02:15:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 02:15:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 02:15:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 02:15:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 02:15:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 02:15:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 02:15:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 02:15:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 02:15:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 02:15:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 02:15:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 02:15:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 02:15:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 02:15:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 02:15:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 02:15:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 02:15:33,423 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 02:15:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 02:15:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 02:15:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 02:15:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 02:15:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 02:15:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 02:15:33,424 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 02:15:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 02:15:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 02:15:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 02:15:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 02:15:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 02:15:33,425 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 02:15:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 02:15:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 02:15:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 02:15:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 02:15:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 02:15:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 02:15:33,426 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 02:15:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 02:15:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 02:15:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 02:15:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 02:15:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 02:15:33,427 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 02:15:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 02:15:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 02:15:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 02:15:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 02:15:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 02:15:33,428 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 02:15:33,429 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 02:15:33,429 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 02:15:33,429 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 02:15:33,429 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 02:15:33,429 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 02:15:33,429 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 02:15:33,430 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 02:15:33,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 02:15:33,430 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 02:15:33,430 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 02:15:33,430 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 02:15:33,430 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 02:15:33,430 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 02:15:33,431 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 02:15:33,431 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 02:15:33,431 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 02:15:33,431 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 02:15:33,431 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 02:15:33,431 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 02:15:33,431 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 02:15:33,432 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 02:15:33,432 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 02:15:33,432 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 02:15:33,432 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 02:15:33,432 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 02:15:33,432 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 02:15:33,433 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 02:15:33,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:15:33,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:15:33,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:15:33,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 02:15:33,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 02:15:33,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 02:15:33,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 02:15:33,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:15:33,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:15:34,089 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:15:34,089 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-22 02:15:34,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:15:34 BoogieIcfgContainer [2020-08-22 02:15:34,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:15:34,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:15:34,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:15:34,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:15:34,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:15:32" (1/3) ... [2020-08-22 02:15:34,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17993470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:15:34, skipping insertion in model container [2020-08-22 02:15:34,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:15:33" (2/3) ... [2020-08-22 02:15:34,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17993470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:15:34, skipping insertion in model container [2020-08-22 02:15:34,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:15:34" (3/3) ... [2020-08-22 02:15:34,102 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-08-22 02:15:34,112 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:15:34,120 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-22 02:15:34,134 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-22 02:15:34,160 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:15:34,160 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:15:34,160 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:15:34,160 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:15:34,161 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:15:34,161 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:15:34,161 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:15:34,162 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:15:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-08-22 02:15:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-22 02:15:34,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:34,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:34,194 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:34,200 INFO L82 PathProgramCache]: Analyzing trace with hash 11193106, now seen corresponding path program 1 times [2020-08-22 02:15:34,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:34,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117289641] [2020-08-22 02:15:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:34,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:34,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117289641] [2020-08-22 02:15:34,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:34,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:15:34,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453298029] [2020-08-22 02:15:34,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:15:34,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:34,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:15:34,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:34,448 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 4 states. [2020-08-22 02:15:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:34,698 INFO L93 Difference]: Finished difference Result 188 states and 306 transitions. [2020-08-22 02:15:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:15:34,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-22 02:15:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:34,711 INFO L225 Difference]: With dead ends: 188 [2020-08-22 02:15:34,711 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 02:15:34,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 02:15:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-08-22 02:15:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 02:15:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-08-22 02:15:34,763 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 8 [2020-08-22 02:15:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:34,763 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-08-22 02:15:34,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:15:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-08-22 02:15:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 02:15:34,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:34,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:34,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:15:34,765 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash -648207140, now seen corresponding path program 1 times [2020-08-22 02:15:34,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:34,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575804378] [2020-08-22 02:15:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:34,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:34,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575804378] [2020-08-22 02:15:34,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:34,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:15:34,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104075815] [2020-08-22 02:15:34,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:15:34,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:34,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:15:34,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:34,852 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 4 states. [2020-08-22 02:15:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:35,013 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-08-22 02:15:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:15:35,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 02:15:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:35,016 INFO L225 Difference]: With dead ends: 85 [2020-08-22 02:15:35,016 INFO L226 Difference]: Without dead ends: 83 [2020-08-22 02:15:35,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-22 02:15:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-08-22 02:15:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 02:15:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-08-22 02:15:35,028 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 14 [2020-08-22 02:15:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:35,029 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-08-22 02:15:35,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:15:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-08-22 02:15:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 02:15:35,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:35,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:35,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:15:35,030 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:35,031 INFO L82 PathProgramCache]: Analyzing trace with hash -648205218, now seen corresponding path program 1 times [2020-08-22 02:15:35,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:35,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459821353] [2020-08-22 02:15:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:35,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:35,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459821353] [2020-08-22 02:15:35,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:35,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:15:35,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088842057] [2020-08-22 02:15:35,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:15:35,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:35,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:15:35,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:15:35,103 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 5 states. [2020-08-22 02:15:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:35,331 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2020-08-22 02:15:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 02:15:35,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 02:15:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:35,334 INFO L225 Difference]: With dead ends: 140 [2020-08-22 02:15:35,334 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 02:15:35,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:35,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 02:15:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2020-08-22 02:15:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 02:15:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-22 02:15:35,345 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 14 [2020-08-22 02:15:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:35,345 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-22 02:15:35,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:15:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-22 02:15:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 02:15:35,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:35,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:35,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:15:35,347 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash -646358176, now seen corresponding path program 1 times [2020-08-22 02:15:35,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:35,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529582575] [2020-08-22 02:15:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:35,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:35,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529582575] [2020-08-22 02:15:35,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:35,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:15:35,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653436836] [2020-08-22 02:15:35,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:15:35,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:15:35,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:15:35,440 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 5 states. [2020-08-22 02:15:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:35,642 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-08-22 02:15:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:15:35,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 02:15:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:35,644 INFO L225 Difference]: With dead ends: 85 [2020-08-22 02:15:35,644 INFO L226 Difference]: Without dead ends: 83 [2020-08-22 02:15:35,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:15:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-22 02:15:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-08-22 02:15:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 02:15:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2020-08-22 02:15:35,678 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 14 [2020-08-22 02:15:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:35,679 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2020-08-22 02:15:35,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:15:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2020-08-22 02:15:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 02:15:35,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:35,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:35,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:15:35,681 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1093009051, now seen corresponding path program 1 times [2020-08-22 02:15:35,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:35,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451259904] [2020-08-22 02:15:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:35,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:35,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451259904] [2020-08-22 02:15:35,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:35,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:15:35,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59605856] [2020-08-22 02:15:35,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:15:35,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:35,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:15:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:35,773 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 4 states. [2020-08-22 02:15:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:35,910 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-08-22 02:15:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:15:35,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-22 02:15:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:35,912 INFO L225 Difference]: With dead ends: 83 [2020-08-22 02:15:35,912 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 02:15:35,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 02:15:35,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-08-22 02:15:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 02:15:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-08-22 02:15:35,919 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 19 [2020-08-22 02:15:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:35,919 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-08-22 02:15:35,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:15:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-08-22 02:15:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 02:15:35,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:35,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:35,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:15:35,921 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash -476453587, now seen corresponding path program 1 times [2020-08-22 02:15:35,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:35,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684198179] [2020-08-22 02:15:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:35,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:35,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684198179] [2020-08-22 02:15:35,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:35,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:15:35,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770190725] [2020-08-22 02:15:35,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:15:35,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:35,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:15:35,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:35,987 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 6 states. [2020-08-22 02:15:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:36,156 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2020-08-22 02:15:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:15:36,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 02:15:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:36,158 INFO L225 Difference]: With dead ends: 136 [2020-08-22 02:15:36,158 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 02:15:36,159 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 [2020-08-22 02:15:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 02:15:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2020-08-22 02:15:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 02:15:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-22 02:15:36,166 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 20 [2020-08-22 02:15:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:36,166 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-22 02:15:36,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:15:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-22 02:15:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 02:15:36,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:36,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:36,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:15:36,168 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 337242584, now seen corresponding path program 1 times [2020-08-22 02:15:36,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:36,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403505626] [2020-08-22 02:15:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:36,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:36,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403505626] [2020-08-22 02:15:36,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:36,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:15:36,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459870670] [2020-08-22 02:15:36,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:15:36,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:15:36,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:36,218 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 4 states. [2020-08-22 02:15:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:36,336 INFO L93 Difference]: Finished difference Result 141 states and 161 transitions. [2020-08-22 02:15:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:15:36,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-22 02:15:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:36,338 INFO L225 Difference]: With dead ends: 141 [2020-08-22 02:15:36,338 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 02:15:36,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 02:15:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2020-08-22 02:15:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 02:15:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-08-22 02:15:36,345 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 24 [2020-08-22 02:15:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:36,345 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-08-22 02:15:36,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:15:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-08-22 02:15:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 02:15:36,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:36,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:36,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:15:36,347 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:36,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1864575058, now seen corresponding path program 1 times [2020-08-22 02:15:36,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:36,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267911984] [2020-08-22 02:15:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:36,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:36,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267911984] [2020-08-22 02:15:36,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:36,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:15:36,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81116037] [2020-08-22 02:15:36,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:15:36,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:36,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:15:36,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:36,387 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 4 states. [2020-08-22 02:15:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:36,505 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-08-22 02:15:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:15:36,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-22 02:15:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:36,507 INFO L225 Difference]: With dead ends: 78 [2020-08-22 02:15:36,507 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 02:15:36,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 02:15:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-08-22 02:15:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 02:15:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-22 02:15:36,513 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 25 [2020-08-22 02:15:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:36,513 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-22 02:15:36,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:15:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-22 02:15:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 02:15:36,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:36,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:36,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:15:36,515 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash -660297045, now seen corresponding path program 1 times [2020-08-22 02:15:36,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:36,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444750830] [2020-08-22 02:15:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:36,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:36,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444750830] [2020-08-22 02:15:36,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:36,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:15:36,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998595250] [2020-08-22 02:15:36,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:15:36,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:15:36,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:15:36,580 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 5 states. [2020-08-22 02:15:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:36,744 INFO L93 Difference]: Finished difference Result 194 states and 222 transitions. [2020-08-22 02:15:36,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:15:36,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 02:15:36,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:36,746 INFO L225 Difference]: With dead ends: 194 [2020-08-22 02:15:36,746 INFO L226 Difference]: Without dead ends: 130 [2020-08-22 02:15:36,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-22 02:15:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 78. [2020-08-22 02:15:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 02:15:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-08-22 02:15:36,753 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 27 [2020-08-22 02:15:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:36,753 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-08-22 02:15:36,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:15:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-08-22 02:15:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 02:15:36,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:36,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:36,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:15:36,755 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:36,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:36,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1681365399, now seen corresponding path program 1 times [2020-08-22 02:15:36,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:36,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839251541] [2020-08-22 02:15:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:36,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:36,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839251541] [2020-08-22 02:15:36,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:36,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:15:36,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480838060] [2020-08-22 02:15:36,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:15:36,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:36,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:15:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:15:36,805 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 5 states. [2020-08-22 02:15:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:36,922 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-08-22 02:15:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:15:36,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 02:15:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:36,924 INFO L225 Difference]: With dead ends: 79 [2020-08-22 02:15:36,924 INFO L226 Difference]: Without dead ends: 77 [2020-08-22 02:15:36,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:15:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-22 02:15:36,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-08-22 02:15:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 02:15:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-22 02:15:36,931 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 27 [2020-08-22 02:15:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:36,932 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-22 02:15:36,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:15:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-22 02:15:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:15:36,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:36,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:36,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:15:36,935 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash -840739825, now seen corresponding path program 1 times [2020-08-22 02:15:36,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:36,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093120336] [2020-08-22 02:15:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:37,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:37,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093120336] [2020-08-22 02:15:37,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:37,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:15:37,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306441755] [2020-08-22 02:15:37,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:15:37,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:37,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:15:37,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:37,045 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 6 states. [2020-08-22 02:15:37,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:37,348 INFO L93 Difference]: Finished difference Result 182 states and 209 transitions. [2020-08-22 02:15:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:15:37,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-22 02:15:37,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:37,349 INFO L225 Difference]: With dead ends: 182 [2020-08-22 02:15:37,349 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 02:15:37,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:15:37,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 02:15:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2020-08-22 02:15:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-22 02:15:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2020-08-22 02:15:37,356 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 28 [2020-08-22 02:15:37,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:37,357 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2020-08-22 02:15:37,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:15:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2020-08-22 02:15:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:15:37,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:37,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:37,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:15:37,358 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:37,359 INFO L82 PathProgramCache]: Analyzing trace with hash -941335665, now seen corresponding path program 1 times [2020-08-22 02:15:37,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:37,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674180007] [2020-08-22 02:15:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:37,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:37,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674180007] [2020-08-22 02:15:37,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:37,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 02:15:37,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475415050] [2020-08-22 02:15:37,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 02:15:37,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:37,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 02:15:37,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:15:37,596 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 8 states. [2020-08-22 02:15:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:38,286 INFO L93 Difference]: Finished difference Result 237 states and 265 transitions. [2020-08-22 02:15:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 02:15:38,286 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-22 02:15:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:38,290 INFO L225 Difference]: With dead ends: 237 [2020-08-22 02:15:38,290 INFO L226 Difference]: Without dead ends: 235 [2020-08-22 02:15:38,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-22 02:15:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-22 02:15:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 98. [2020-08-22 02:15:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 02:15:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-08-22 02:15:38,299 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 28 [2020-08-22 02:15:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:38,299 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-08-22 02:15:38,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 02:15:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-08-22 02:15:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 02:15:38,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:38,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:38,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:15:38,301 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:38,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1932526751, now seen corresponding path program 1 times [2020-08-22 02:15:38,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:38,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174417443] [2020-08-22 02:15:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:38,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 02:15:38,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174417443] [2020-08-22 02:15:38,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:38,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:15:38,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742776639] [2020-08-22 02:15:38,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:15:38,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:38,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:15:38,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:15:38,352 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 5 states. [2020-08-22 02:15:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:38,599 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2020-08-22 02:15:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 02:15:38,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-22 02:15:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:38,601 INFO L225 Difference]: With dead ends: 145 [2020-08-22 02:15:38,601 INFO L226 Difference]: Without dead ends: 127 [2020-08-22 02:15:38,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-08-22 02:15:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-08-22 02:15:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 02:15:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2020-08-22 02:15:38,609 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 30 [2020-08-22 02:15:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:38,609 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2020-08-22 02:15:38,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:15:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2020-08-22 02:15:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 02:15:38,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:38,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:38,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:15:38,615 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:38,615 INFO L82 PathProgramCache]: Analyzing trace with hash -250794977, now seen corresponding path program 1 times [2020-08-22 02:15:38,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:38,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956790522] [2020-08-22 02:15:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:38,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 02:15:38,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956790522] [2020-08-22 02:15:38,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:38,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:15:38,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968718782] [2020-08-22 02:15:38,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:15:38,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:38,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:15:38,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:38,669 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 4 states. [2020-08-22 02:15:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:38,806 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2020-08-22 02:15:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:15:38,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-22 02:15:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:38,812 INFO L225 Difference]: With dead ends: 119 [2020-08-22 02:15:38,812 INFO L226 Difference]: Without dead ends: 117 [2020-08-22 02:15:38,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-08-22 02:15:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-08-22 02:15:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 02:15:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2020-08-22 02:15:38,827 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 30 [2020-08-22 02:15:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:38,827 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2020-08-22 02:15:38,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:15:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2020-08-22 02:15:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 02:15:38,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:38,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:38,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:15:38,829 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1485208190, now seen corresponding path program 1 times [2020-08-22 02:15:38,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:38,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72703611] [2020-08-22 02:15:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:39,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:39,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72703611] [2020-08-22 02:15:39,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:39,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 02:15:39,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382998705] [2020-08-22 02:15:39,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 02:15:39,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:39,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 02:15:39,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:15:39,052 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand 8 states. [2020-08-22 02:15:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:39,620 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2020-08-22 02:15:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 02:15:39,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 02:15:39,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:39,623 INFO L225 Difference]: With dead ends: 240 [2020-08-22 02:15:39,623 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 02:15:39,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-22 02:15:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 02:15:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 120. [2020-08-22 02:15:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 02:15:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-08-22 02:15:39,632 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 31 [2020-08-22 02:15:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:39,632 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-08-22 02:15:39,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 02:15:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-08-22 02:15:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 02:15:39,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:39,634 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:39,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 02:15:39,634 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:39,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1679328926, now seen corresponding path program 1 times [2020-08-22 02:15:39,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:39,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144697461] [2020-08-22 02:15:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:39,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:39,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144697461] [2020-08-22 02:15:39,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:39,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 02:15:39,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666156459] [2020-08-22 02:15:39,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:15:39,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:39,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:15:39,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:39,724 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 6 states. [2020-08-22 02:15:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:39,990 INFO L93 Difference]: Finished difference Result 207 states and 241 transitions. [2020-08-22 02:15:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 02:15:39,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 02:15:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:39,992 INFO L225 Difference]: With dead ends: 207 [2020-08-22 02:15:39,992 INFO L226 Difference]: Without dead ends: 145 [2020-08-22 02:15:39,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:15:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-22 02:15:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 122. [2020-08-22 02:15:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 02:15:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 142 transitions. [2020-08-22 02:15:40,001 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 142 transitions. Word has length 33 [2020-08-22 02:15:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:40,002 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 142 transitions. [2020-08-22 02:15:40,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:15:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 142 transitions. [2020-08-22 02:15:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 02:15:40,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:40,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:40,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 02:15:40,003 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1814124928, now seen corresponding path program 1 times [2020-08-22 02:15:40,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:40,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027093249] [2020-08-22 02:15:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:40,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:40,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027093249] [2020-08-22 02:15:40,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:40,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 02:15:40,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708396371] [2020-08-22 02:15:40,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:15:40,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:40,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:15:40,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:15:40,082 INFO L87 Difference]: Start difference. First operand 122 states and 142 transitions. Second operand 7 states. [2020-08-22 02:15:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:40,383 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2020-08-22 02:15:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 02:15:40,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-22 02:15:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:40,385 INFO L225 Difference]: With dead ends: 198 [2020-08-22 02:15:40,385 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 02:15:40,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:15:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 02:15:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-22 02:15:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 02:15:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2020-08-22 02:15:40,395 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 33 [2020-08-22 02:15:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:40,395 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2020-08-22 02:15:40,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:15:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2020-08-22 02:15:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 02:15:40,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:40,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:40,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 02:15:40,397 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2032979646, now seen corresponding path program 1 times [2020-08-22 02:15:40,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:40,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827028429] [2020-08-22 02:15:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:40,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 02:15:40,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827028429] [2020-08-22 02:15:40,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:40,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:15:40,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221320983] [2020-08-22 02:15:40,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:15:40,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:40,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:15:40,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:40,455 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand 6 states. [2020-08-22 02:15:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:40,658 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2020-08-22 02:15:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:15:40,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 02:15:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:40,660 INFO L225 Difference]: With dead ends: 182 [2020-08-22 02:15:40,660 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 02:15:40,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:15:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 02:15:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2020-08-22 02:15:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 02:15:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 179 transitions. [2020-08-22 02:15:40,677 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 179 transitions. Word has length 33 [2020-08-22 02:15:40,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:40,677 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 179 transitions. [2020-08-22 02:15:40,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:15:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 179 transitions. [2020-08-22 02:15:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 02:15:40,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:40,678 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:40,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 02:15:40,679 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:40,679 INFO L82 PathProgramCache]: Analyzing trace with hash 270360779, now seen corresponding path program 1 times [2020-08-22 02:15:40,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:40,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772715585] [2020-08-22 02:15:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:40,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:40,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772715585] [2020-08-22 02:15:40,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:40,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 02:15:40,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116368779] [2020-08-22 02:15:40,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:15:40,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:40,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:15:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:15:40,767 INFO L87 Difference]: Start difference. First operand 152 states and 179 transitions. Second operand 7 states. [2020-08-22 02:15:41,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:41,093 INFO L93 Difference]: Finished difference Result 241 states and 276 transitions. [2020-08-22 02:15:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:15:41,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-08-22 02:15:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:41,095 INFO L225 Difference]: With dead ends: 241 [2020-08-22 02:15:41,096 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 02:15:41,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:15:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 02:15:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2020-08-22 02:15:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-08-22 02:15:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2020-08-22 02:15:41,106 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 36 [2020-08-22 02:15:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:41,107 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2020-08-22 02:15:41,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:15:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2020-08-22 02:15:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 02:15:41,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:41,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:41,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 02:15:41,108 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash -620993698, now seen corresponding path program 1 times [2020-08-22 02:15:41,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:41,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73191289] [2020-08-22 02:15:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:41,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:41,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73191289] [2020-08-22 02:15:41,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:41,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:15:41,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577590176] [2020-08-22 02:15:41,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:15:41,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:15:41,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:41,145 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 4 states. [2020-08-22 02:15:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:41,283 INFO L93 Difference]: Finished difference Result 354 states and 437 transitions. [2020-08-22 02:15:41,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:15:41,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-08-22 02:15:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:41,285 INFO L225 Difference]: With dead ends: 354 [2020-08-22 02:15:41,285 INFO L226 Difference]: Without dead ends: 258 [2020-08-22 02:15:41,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:15:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-22 02:15:41,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 218. [2020-08-22 02:15:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-08-22 02:15:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 262 transitions. [2020-08-22 02:15:41,298 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 262 transitions. Word has length 36 [2020-08-22 02:15:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:41,298 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 262 transitions. [2020-08-22 02:15:41,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:15:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 262 transitions. [2020-08-22 02:15:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 02:15:41,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:41,299 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:41,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 02:15:41,300 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:41,300 INFO L82 PathProgramCache]: Analyzing trace with hash -366933706, now seen corresponding path program 1 times [2020-08-22 02:15:41,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:41,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104340288] [2020-08-22 02:15:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:41,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:41,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104340288] [2020-08-22 02:15:41,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:41,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:15:41,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788303501] [2020-08-22 02:15:41,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:15:41,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:15:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:15:41,528 INFO L87 Difference]: Start difference. First operand 218 states and 262 transitions. Second operand 10 states. [2020-08-22 02:15:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:42,238 INFO L93 Difference]: Finished difference Result 430 states and 511 transitions. [2020-08-22 02:15:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 02:15:42,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-08-22 02:15:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:42,241 INFO L225 Difference]: With dead ends: 430 [2020-08-22 02:15:42,241 INFO L226 Difference]: Without dead ends: 338 [2020-08-22 02:15:42,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-08-22 02:15:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-08-22 02:15:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 235. [2020-08-22 02:15:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-08-22 02:15:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2020-08-22 02:15:42,256 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 40 [2020-08-22 02:15:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:42,256 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2020-08-22 02:15:42,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:15:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2020-08-22 02:15:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 02:15:42,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:42,257 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:42,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 02:15:42,257 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:42,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1933888884, now seen corresponding path program 1 times [2020-08-22 02:15:42,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:42,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47507662] [2020-08-22 02:15:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:42,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:42,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47507662] [2020-08-22 02:15:42,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:15:42,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:15:42,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090900171] [2020-08-22 02:15:42,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:15:42,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:42,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:15:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:15:42,305 INFO L87 Difference]: Start difference. First operand 235 states and 282 transitions. Second operand 6 states. [2020-08-22 02:15:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:42,505 INFO L93 Difference]: Finished difference Result 353 states and 426 transitions. [2020-08-22 02:15:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:15:42,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-22 02:15:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:42,507 INFO L225 Difference]: With dead ends: 353 [2020-08-22 02:15:42,508 INFO L226 Difference]: Without dead ends: 244 [2020-08-22 02:15:42,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:15:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-22 02:15:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 237. [2020-08-22 02:15:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-22 02:15:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 284 transitions. [2020-08-22 02:15:42,521 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 284 transitions. Word has length 40 [2020-08-22 02:15:42,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:42,522 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 284 transitions. [2020-08-22 02:15:42,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:15:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 284 transitions. [2020-08-22 02:15:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 02:15:42,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:42,523 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:42,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 02:15:42,523 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:42,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1340010058, now seen corresponding path program 1 times [2020-08-22 02:15:42,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:42,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998941093] [2020-08-22 02:15:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:42,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:15:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:15:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:15:42,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998941093] [2020-08-22 02:15:42,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:15:42,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:15:42,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245618644] [2020-08-22 02:15:42,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:15:42,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:15:42,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:15:42,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:15:42,742 INFO L87 Difference]: Start difference. First operand 237 states and 284 transitions. Second operand 10 states. [2020-08-22 02:15:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:15:43,386 INFO L93 Difference]: Finished difference Result 441 states and 526 transitions. [2020-08-22 02:15:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 02:15:43,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-08-22 02:15:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:15:43,388 INFO L225 Difference]: With dead ends: 441 [2020-08-22 02:15:43,388 INFO L226 Difference]: Without dead ends: 349 [2020-08-22 02:15:43,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:15:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-22 02:15:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 239. [2020-08-22 02:15:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-08-22 02:15:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2020-08-22 02:15:43,402 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 40 [2020-08-22 02:15:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:15:43,402 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2020-08-22 02:15:43,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:15:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2020-08-22 02:15:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 02:15:43,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:15:43,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:15:43,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 02:15:43,403 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:15:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:15:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1717014481, now seen corresponding path program 1 times [2020-08-22 02:15:43,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:15:43,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524559848] [2020-08-22 02:15:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:15:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 02:15:43,418 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 02:15:43,418 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 02:15:43,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 02:15:43,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:15:43 BoogieIcfgContainer [2020-08-22 02:15:43,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:15:43,443 INFO L168 Benchmark]: Toolchain (without parser) took 10861.94 ms. Allocated memory was 144.7 MB in the beginning and 332.9 MB in the end (delta: 188.2 MB). Free memory was 102.6 MB in the beginning and 281.2 MB in the end (delta: -178.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 02:15:43,444 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.7 MB. Free memory was 122.3 MB in the beginning and 122.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 02:15:43,444 INFO L168 Benchmark]: CACSL2BoogieTranslator took 683.87 ms. Allocated memory was 144.7 MB in the beginning and 203.4 MB in the end (delta: 58.7 MB). Free memory was 102.4 MB in the beginning and 171.0 MB in the end (delta: -68.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-22 02:15:43,445 INFO L168 Benchmark]: Boogie Preprocessor took 84.83 ms. Allocated memory is still 203.4 MB. Free memory was 171.0 MB in the beginning and 167.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-22 02:15:43,445 INFO L168 Benchmark]: RCFGBuilder took 737.52 ms. Allocated memory is still 203.4 MB. Free memory was 167.0 MB in the beginning and 111.2 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-08-22 02:15:43,446 INFO L168 Benchmark]: TraceAbstraction took 9345.87 ms. Allocated memory was 203.4 MB in the beginning and 332.9 MB in the end (delta: 129.5 MB). Free memory was 111.2 MB in the beginning and 281.2 MB in the end (delta: -170.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 02:15:43,448 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 144.7 MB. Free memory was 122.3 MB in the beginning and 122.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 683.87 ms. Allocated memory was 144.7 MB in the beginning and 203.4 MB in the end (delta: 58.7 MB). Free memory was 102.4 MB in the beginning and 171.0 MB in the end (delta: -68.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 84.83 ms. Allocated memory is still 203.4 MB. Free memory was 171.0 MB in the beginning and 167.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 737.52 ms. Allocated memory is still 203.4 MB. Free memory was 167.0 MB in the beginning and 111.2 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9345.87 ms. Allocated memory was 203.4 MB in the beginning and 332.9 MB in the end (delta: 129.5 MB). Free memory was 111.2 MB in the beginning and 281.2 MB in the end (delta: -170.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1025]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L991] SLL* list = malloc(sizeof(SLL)); [L992] list->next = ((void*)0) [L993] COND FALSE !(!(list != ((void*)0))) [L993] COND FALSE !(__VERIFIER_nondet_int()) [L993] list->inner = malloc(sizeof(SLL)) [L993] EXPR list->inner [L993] list->inner->next = ((void*)0) [L993] EXPR list->inner [L993] list->inner->inner = ((void*)0) [L993] EXPR list->inner [L993] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L993] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L995] SLL* end = list; [L998] COND FALSE !(__VERIFIER_nondet_int()) [L1008] end = ((void*)0) [L1009] end = list [L1012] COND FALSE !(!(((void*)0) != end)) [L1014] COND TRUE ((void*)0) != end [L1016] int len = 0; [L1017] EXPR end->inner [L1017] SLL* inner = end->inner; [L1018] COND TRUE ((void*)0) != inner [L1020] COND TRUE len == 0 [L1021] len = 1 [L1024] COND FALSE !(!(((void*)0) != inner)) [L1025] EXPR inner->inner [L1025] COND FALSE !(!(((void*)0) == inner->inner)) [L1026] EXPR inner->next [L1026] COND FALSE !(!(((void*)0) == inner->next)) [L1027] EXPR inner->inner [L1027] inner = inner->inner [L1028] COND TRUE len == 1 [L1029] EXPR inner->inner [L1029] inner = inner->inner [L1018] COND TRUE ((void*)0) != inner [L1020] COND FALSE !(len == 0) [L1023] len = 2 [L1024] COND FALSE !(!(((void*)0) != inner)) [L1025] EXPR inner->inner [L1025] COND TRUE !(((void*)0) == inner->inner) [L1025] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 89 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.2s, OverallIterations: 24, TraceHistogramMax: 2, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1788 SDtfs, 2214 SDslu, 3432 SDs, 0 SdLazy, 4020 SolverSat, 226 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 892 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 670 NumberOfCodeBlocks, 670 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 607 ConstructedInterpolants, 0 QuantifiedInterpolants, 157879 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 19 PerfectInterpolantSequences, 9/16 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...