/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 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 [2020-08-21 14:08:54,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:08:54,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:08:54,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:08:54,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:08:54,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:08:54,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:08:54,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:08:54,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:08:54,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:08:54,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:08:54,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:08:54,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:08:54,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:08:54,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:08:54,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:08:54,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:08:54,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:08:54,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:08:54,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:08:54,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:08:54,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:08:54,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:08:54,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:08:54,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:08:54,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:08:54,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:08:54,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:08:54,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:08:54,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:08:54,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:08:54,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:08:54,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:08:54,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:08:54,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:08:54,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:08:54,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:08:54,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:08:54,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:08:54,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:08:54,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:08:54,156 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 [2020-08-21 14:08:54,177 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:08:54,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:08:54,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:08:54,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:08:54,179 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:08:54,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:08:54,180 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:08:54,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:08:54,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:08:54,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:08:54,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:08:54,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:08:54,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:08:54,181 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:08:54,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:08:54,181 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:08:54,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:08:54,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:08:54,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:08:54,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:08:54,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:08:54,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:08:54,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:08:54,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:08:54,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:08:54,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:08:54,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:08:54,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:08:54,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:08:54,184 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 -> log-additional-information=true; [2020-08-21 14:08:54,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:08:54,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:08:54,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:08:54,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:08:54,503 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:08:54,504 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-08-21 14:08:54,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12123f48e/8b8512f2c9d649d9aebee9376d541e49/FLAGd80743b11 [2020-08-21 14:08:55,099 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:08:55,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-08-21 14:08:55,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12123f48e/8b8512f2c9d649d9aebee9376d541e49/FLAGd80743b11 [2020-08-21 14:08:55,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12123f48e/8b8512f2c9d649d9aebee9376d541e49 [2020-08-21 14:08:55,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:08:55,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:08:55,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:08:55,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:08:55,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:08:55,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:08:55" (1/1) ... [2020-08-21 14:08:55,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6faa959a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:55, skipping insertion in model container [2020-08-21 14:08:55,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:08:55" (1/1) ... [2020-08-21 14:08:55,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:08:55,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:08:55,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:08:56,000 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:08:56,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:08:56,145 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:08:56,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56 WrapperNode [2020-08-21 14:08:56,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:08:56,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:08:56,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:08:56,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:08:56,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56" (1/1) ... [2020-08-21 14:08:56,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56" (1/1) ... [2020-08-21 14:08:56,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56" (1/1) ... [2020-08-21 14:08:56,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56" (1/1) ... [2020-08-21 14:08:56,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56" (1/1) ... [2020-08-21 14:08:56,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56" (1/1) ... [2020-08-21 14:08:56,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56" (1/1) ... [2020-08-21 14:08:56,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:08:56,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:08:56,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:08:56,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:08:56,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56" (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 [2020-08-21 14:08:56,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:08:56,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:08:56,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:08:56,283 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 14:08:56,283 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 14:08:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 14:08:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 14:08:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 14:08:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 14:08:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 14:08:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 14:08:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 14:08:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 14:08:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 14:08:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 14:08:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 14:08:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 14:08:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 14:08:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 14:08:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 14:08:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 14:08:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 14:08:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 14:08:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 14:08:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 14:08:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 14:08:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 14:08:56,287 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 14:08:56,288 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 14:08:56,288 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 14:08:56,288 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 14:08:56,288 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 14:08:56,288 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 14:08:56,288 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 14:08:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 14:08:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 14:08:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 14:08:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 14:08:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 14:08:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 14:08:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 14:08:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 14:08:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 14:08:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 14:08:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 14:08:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 14:08:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 14:08:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 14:08:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 14:08:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 14:08:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 14:08:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 14:08:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 14:08:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:08:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 14:08:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 14:08:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:08:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 14:08:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 14:08:56,293 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 14:08:56,293 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 14:08:56,293 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 14:08:56,293 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 14:08:56,293 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 14:08:56,293 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 14:08:56,293 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 14:08:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 14:08:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 14:08:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 14:08:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 14:08:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 14:08:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 14:08:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 14:08:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 14:08:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 14:08:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 14:08:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 14:08:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 14:08:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 14:08:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 14:08:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 14:08:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 14:08:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 14:08:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 14:08:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 14:08:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 14:08:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 14:08:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 14:08:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 14:08:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 14:08:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 14:08:56,297 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 14:08:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 14:08:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 14:08:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 14:08:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 14:08:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 14:08:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 14:08:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 14:08:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 14:08:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 14:08:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 14:08:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 14:08:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 14:08:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 14:08:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 14:08:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:08:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:08:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:08:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:08:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:08:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:08:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:08:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:08:56,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:08:56,986 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:08:56,986 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-21 14:08:56,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:08:56 BoogieIcfgContainer [2020-08-21 14:08:56,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:08:56,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:08:56,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:08:56,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:08:56,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:08:55" (1/3) ... [2020-08-21 14:08:56,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f885bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:08:56, skipping insertion in model container [2020-08-21 14:08:56,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:08:56" (2/3) ... [2020-08-21 14:08:56,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f885bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:08:56, skipping insertion in model container [2020-08-21 14:08:56,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:08:56" (3/3) ... [2020-08-21 14:08:57,000 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-08-21 14:08:57,011 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:08:57,019 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-21 14:08:57,034 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-21 14:08:57,055 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:08:57,055 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:08:57,055 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:08:57,055 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:08:57,056 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:08:57,056 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:08:57,056 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:08:57,056 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:08:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-08-21 14:08:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-21 14:08:57,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:57,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:08:57,088 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]=== [2020-08-21 14:08:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash 11193106, now seen corresponding path program 1 times [2020-08-21 14:08:57,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:57,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192838964] [2020-08-21 14:08:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:57,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:57,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192838964] [2020-08-21 14:08:57,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:57,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:08:57,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885843675] [2020-08-21 14:08:57,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:08:57,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:57,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:08:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:08:57,346 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 4 states. [2020-08-21 14:08:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:08:57,678 INFO L93 Difference]: Finished difference Result 188 states and 306 transitions. [2020-08-21 14:08:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:08:57,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-21 14:08:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:08:57,691 INFO L225 Difference]: With dead ends: 188 [2020-08-21 14:08:57,692 INFO L226 Difference]: Without dead ends: 100 [2020-08-21 14:08:57,696 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 [2020-08-21 14:08:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-21 14:08:57,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-08-21 14:08:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 14:08:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-08-21 14:08:57,743 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 8 [2020-08-21 14:08:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:08:57,744 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-08-21 14:08:57,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:08:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-08-21 14:08:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:08:57,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:57,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:08:57,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:08:57,746 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]=== [2020-08-21 14:08:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:57,747 INFO L82 PathProgramCache]: Analyzing trace with hash -648207140, now seen corresponding path program 1 times [2020-08-21 14:08:57,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:57,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335546955] [2020-08-21 14:08:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:57,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:57,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335546955] [2020-08-21 14:08:57,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:57,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:08:57,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968190215] [2020-08-21 14:08:57,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:08:57,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:08:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:08:57,815 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 4 states. [2020-08-21 14:08:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:08:57,973 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-08-21 14:08:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:08:57,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 14:08:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:08:57,976 INFO L225 Difference]: With dead ends: 85 [2020-08-21 14:08:57,976 INFO L226 Difference]: Without dead ends: 83 [2020-08-21 14:08:57,977 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 [2020-08-21 14:08:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-21 14:08:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-08-21 14:08:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 14:08:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-08-21 14:08:57,988 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 14 [2020-08-21 14:08:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:08:57,988 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-08-21 14:08:57,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:08:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-08-21 14:08:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:08:57,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:57,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:08:57,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:08:57,990 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]=== [2020-08-21 14:08:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:57,991 INFO L82 PathProgramCache]: Analyzing trace with hash -648205218, now seen corresponding path program 1 times [2020-08-21 14:08:57,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:57,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384691791] [2020-08-21 14:08:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:58,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:58,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384691791] [2020-08-21 14:08:58,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:58,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:08:58,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085680547] [2020-08-21 14:08:58,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:08:58,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:58,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:08:58,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:08:58,066 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 5 states. [2020-08-21 14:08:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:08:58,305 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2020-08-21 14:08:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:08:58,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 14:08:58,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:08:58,307 INFO L225 Difference]: With dead ends: 140 [2020-08-21 14:08:58,307 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 14:08:58,308 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 [2020-08-21 14:08:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 14:08:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2020-08-21 14:08:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 14:08:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-21 14:08:58,319 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 14 [2020-08-21 14:08:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:08:58,319 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-21 14:08:58,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:08:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-21 14:08:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:08:58,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:58,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:08:58,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:08:58,321 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]=== [2020-08-21 14:08:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:58,322 INFO L82 PathProgramCache]: Analyzing trace with hash -646358176, now seen corresponding path program 1 times [2020-08-21 14:08:58,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:58,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244650764] [2020-08-21 14:08:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:58,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:58,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244650764] [2020-08-21 14:08:58,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:58,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:08:58,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729508671] [2020-08-21 14:08:58,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:08:58,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:08:58,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:08:58,449 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 5 states. [2020-08-21 14:08:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:08:58,706 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-08-21 14:08:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:08:58,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 14:08:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:08:58,709 INFO L225 Difference]: With dead ends: 85 [2020-08-21 14:08:58,709 INFO L226 Difference]: Without dead ends: 83 [2020-08-21 14:08:58,710 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 [2020-08-21 14:08:58,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-21 14:08:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-08-21 14:08:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-21 14:08:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2020-08-21 14:08:58,718 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 14 [2020-08-21 14:08:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:08:58,719 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2020-08-21 14:08:58,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:08:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2020-08-21 14:08:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:08:58,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:58,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:08:58,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:08:58,721 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]=== [2020-08-21 14:08:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:58,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1093009051, now seen corresponding path program 1 times [2020-08-21 14:08:58,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:58,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416032412] [2020-08-21 14:08:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:58,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:58,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416032412] [2020-08-21 14:08:58,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:58,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:08:58,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741155541] [2020-08-21 14:08:58,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:08:58,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:58,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:08:58,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:08:58,780 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 4 states. [2020-08-21 14:08:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:08:58,950 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-08-21 14:08:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:08:58,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-21 14:08:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:08:58,952 INFO L225 Difference]: With dead ends: 83 [2020-08-21 14:08:58,952 INFO L226 Difference]: Without dead ends: 79 [2020-08-21 14:08:58,953 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 [2020-08-21 14:08:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-21 14:08:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-08-21 14:08:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 14:08:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-08-21 14:08:58,960 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 19 [2020-08-21 14:08:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:08:58,961 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-08-21 14:08:58,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:08:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-08-21 14:08:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:08:58,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:58,962 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] [2020-08-21 14:08:58,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:08:58,962 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]=== [2020-08-21 14:08:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:58,963 INFO L82 PathProgramCache]: Analyzing trace with hash -476453587, now seen corresponding path program 1 times [2020-08-21 14:08:58,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:58,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002956569] [2020-08-21 14:08:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:59,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002956569] [2020-08-21 14:08:59,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:59,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:08:59,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050552295] [2020-08-21 14:08:59,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:08:59,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:59,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:08:59,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:08:59,020 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 6 states. [2020-08-21 14:08:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:08:59,204 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2020-08-21 14:08:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:08:59,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 14:08:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:08:59,206 INFO L225 Difference]: With dead ends: 136 [2020-08-21 14:08:59,206 INFO L226 Difference]: Without dead ends: 116 [2020-08-21 14:08:59,207 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 [2020-08-21 14:08:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-21 14:08:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2020-08-21 14:08:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 14:08:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-21 14:08:59,214 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 20 [2020-08-21 14:08:59,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:08:59,214 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-21 14:08:59,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:08:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-21 14:08:59,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:08:59,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:59,216 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] [2020-08-21 14:08:59,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:08:59,216 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]=== [2020-08-21 14:08:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:59,216 INFO L82 PathProgramCache]: Analyzing trace with hash 337242584, now seen corresponding path program 1 times [2020-08-21 14:08:59,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:59,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8459218] [2020-08-21 14:08:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:59,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8459218] [2020-08-21 14:08:59,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:59,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:08:59,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287576727] [2020-08-21 14:08:59,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:08:59,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:08:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:08:59,262 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 4 states. [2020-08-21 14:08:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:08:59,377 INFO L93 Difference]: Finished difference Result 141 states and 161 transitions. [2020-08-21 14:08:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:08:59,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-21 14:08:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:08:59,379 INFO L225 Difference]: With dead ends: 141 [2020-08-21 14:08:59,379 INFO L226 Difference]: Without dead ends: 99 [2020-08-21 14:08:59,380 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 [2020-08-21 14:08:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-21 14:08:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2020-08-21 14:08:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 14:08:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-08-21 14:08:59,399 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 24 [2020-08-21 14:08:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:08:59,399 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-08-21 14:08:59,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:08:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-08-21 14:08:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:08:59,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:59,400 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] [2020-08-21 14:08:59,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:08:59,404 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]=== [2020-08-21 14:08:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1864575058, now seen corresponding path program 1 times [2020-08-21 14:08:59,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:59,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870912342] [2020-08-21 14:08:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:59,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870912342] [2020-08-21 14:08:59,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:59,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:08:59,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807228800] [2020-08-21 14:08:59,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:08:59,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:59,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:08:59,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:08:59,446 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 4 states. [2020-08-21 14:08:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:08:59,565 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-08-21 14:08:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:08:59,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-21 14:08:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:08:59,566 INFO L225 Difference]: With dead ends: 78 [2020-08-21 14:08:59,566 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 14:08:59,567 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 [2020-08-21 14:08:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 14:08:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-08-21 14:08:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 14:08:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-21 14:08:59,573 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 25 [2020-08-21 14:08:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:08:59,574 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-21 14:08:59,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:08:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-21 14:08:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:08:59,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:59,575 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] [2020-08-21 14:08:59,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:08:59,576 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]=== [2020-08-21 14:08:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash -660297045, now seen corresponding path program 1 times [2020-08-21 14:08:59,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:59,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098678524] [2020-08-21 14:08:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:59,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098678524] [2020-08-21 14:08:59,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:59,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:08:59,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156523466] [2020-08-21 14:08:59,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:08:59,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:59,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:08:59,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:08:59,640 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 5 states. [2020-08-21 14:08:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:08:59,838 INFO L93 Difference]: Finished difference Result 194 states and 222 transitions. [2020-08-21 14:08:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:08:59,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 14:08:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:08:59,840 INFO L225 Difference]: With dead ends: 194 [2020-08-21 14:08:59,840 INFO L226 Difference]: Without dead ends: 130 [2020-08-21 14:08:59,841 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 [2020-08-21 14:08:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-21 14:08:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 78. [2020-08-21 14:08:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 14:08:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-08-21 14:08:59,850 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 27 [2020-08-21 14:08:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:08:59,850 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-08-21 14:08:59,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:08:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-08-21 14:08:59,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:08:59,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:08:59,851 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] [2020-08-21 14:08:59,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:08:59,852 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]=== [2020-08-21 14:08:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:08:59,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1681365399, now seen corresponding path program 1 times [2020-08-21 14:08:59,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:08:59,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137572808] [2020-08-21 14:08:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:08:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:08:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:08:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:08:59,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137572808] [2020-08-21 14:08:59,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:08:59,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:08:59,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461303316] [2020-08-21 14:08:59,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:08:59,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:08:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:08:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:08:59,907 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 5 states. [2020-08-21 14:09:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:00,051 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-08-21 14:09:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:09:00,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 14:09:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:00,053 INFO L225 Difference]: With dead ends: 79 [2020-08-21 14:09:00,054 INFO L226 Difference]: Without dead ends: 77 [2020-08-21 14:09:00,054 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 [2020-08-21 14:09:00,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-21 14:09:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-08-21 14:09:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 14:09:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-21 14:09:00,059 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 27 [2020-08-21 14:09:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:00,060 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-21 14:09:00,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:09:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-21 14:09:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:09:00,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:00,061 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] [2020-08-21 14:09:00,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:09:00,062 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]=== [2020-08-21 14:09:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash -840739825, now seen corresponding path program 1 times [2020-08-21 14:09:00,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:00,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070724218] [2020-08-21 14:09:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:00,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:00,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070724218] [2020-08-21 14:09:00,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:09:00,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:09:00,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812687766] [2020-08-21 14:09:00,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:09:00,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:00,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:09:00,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:09:00,162 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 6 states. [2020-08-21 14:09:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:00,491 INFO L93 Difference]: Finished difference Result 182 states and 209 transitions. [2020-08-21 14:09:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:09:00,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 14:09:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:00,493 INFO L225 Difference]: With dead ends: 182 [2020-08-21 14:09:00,493 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 14:09:00,494 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 [2020-08-21 14:09:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 14:09:00,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2020-08-21 14:09:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-21 14:09:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2020-08-21 14:09:00,503 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 28 [2020-08-21 14:09:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:00,504 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2020-08-21 14:09:00,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:09:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2020-08-21 14:09:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:09:00,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:00,505 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] [2020-08-21 14:09:00,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:09:00,506 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]=== [2020-08-21 14:09:00,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:00,506 INFO L82 PathProgramCache]: Analyzing trace with hash -941335665, now seen corresponding path program 1 times [2020-08-21 14:09:00,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:00,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396464149] [2020-08-21 14:09:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:00,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:00,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396464149] [2020-08-21 14:09:00,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:09:00,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:09:00,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739540551] [2020-08-21 14:09:00,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:09:00,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:09:00,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:09:00,760 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 8 states. [2020-08-21 14:09:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:01,432 INFO L93 Difference]: Finished difference Result 237 states and 265 transitions. [2020-08-21 14:09:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:09:01,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-21 14:09:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:01,437 INFO L225 Difference]: With dead ends: 237 [2020-08-21 14:09:01,438 INFO L226 Difference]: Without dead ends: 235 [2020-08-21 14:09:01,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:09:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-21 14:09:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 98. [2020-08-21 14:09:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 14:09:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-08-21 14:09:01,452 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 28 [2020-08-21 14:09:01,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:01,455 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-08-21 14:09:01,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:09:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-08-21 14:09:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:09:01,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:01,460 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] [2020-08-21 14:09:01,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:09:01,461 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]=== [2020-08-21 14:09:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1932526751, now seen corresponding path program 1 times [2020-08-21 14:09:01,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:01,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411307691] [2020-08-21 14:09:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:01,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 14:09:01,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411307691] [2020-08-21 14:09:01,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:09:01,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:09:01,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545922938] [2020-08-21 14:09:01,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:09:01,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:01,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:09:01,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:09:01,567 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 5 states. [2020-08-21 14:09:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:01,799 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2020-08-21 14:09:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:09:01,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-21 14:09:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:01,801 INFO L225 Difference]: With dead ends: 145 [2020-08-21 14:09:01,802 INFO L226 Difference]: Without dead ends: 127 [2020-08-21 14:09:01,803 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 [2020-08-21 14:09:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-08-21 14:09:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-08-21 14:09:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-21 14:09:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2020-08-21 14:09:01,815 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 30 [2020-08-21 14:09:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:01,815 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2020-08-21 14:09:01,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:09:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2020-08-21 14:09:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:09:01,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:01,819 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] [2020-08-21 14:09:01,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:09:01,820 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]=== [2020-08-21 14:09:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash -250794977, now seen corresponding path program 1 times [2020-08-21 14:09:01,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:01,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609989203] [2020-08-21 14:09:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:01,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 14:09:01,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609989203] [2020-08-21 14:09:01,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:09:01,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:09:01,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262919803] [2020-08-21 14:09:01,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:09:01,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:01,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:09:01,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:09:01,876 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 4 states. [2020-08-21 14:09:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:02,012 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2020-08-21 14:09:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:09:02,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-21 14:09:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:02,014 INFO L225 Difference]: With dead ends: 119 [2020-08-21 14:09:02,014 INFO L226 Difference]: Without dead ends: 117 [2020-08-21 14:09:02,015 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 [2020-08-21 14:09:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-08-21 14:09:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-08-21 14:09:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-21 14:09:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2020-08-21 14:09:02,023 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 30 [2020-08-21 14:09:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:02,023 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2020-08-21 14:09:02,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:09:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2020-08-21 14:09:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 14:09:02,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:02,024 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] [2020-08-21 14:09:02,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:09:02,025 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]=== [2020-08-21 14:09:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:02,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1485208190, now seen corresponding path program 1 times [2020-08-21 14:09:02,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:02,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590167037] [2020-08-21 14:09:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:02,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:02,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590167037] [2020-08-21 14:09:02,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:09:02,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:09:02,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711089857] [2020-08-21 14:09:02,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:09:02,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:02,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:09:02,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:09:02,194 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand 8 states. [2020-08-21 14:09:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:02,809 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2020-08-21 14:09:02,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:09:02,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 14:09:02,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:02,811 INFO L225 Difference]: With dead ends: 240 [2020-08-21 14:09:02,811 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 14:09:02,812 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 [2020-08-21 14:09:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 14:09:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 120. [2020-08-21 14:09:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 14:09:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-08-21 14:09:02,824 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 31 [2020-08-21 14:09:02,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:02,825 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-08-21 14:09:02,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:09:02,826 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-08-21 14:09:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 14:09:02,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:02,827 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] [2020-08-21 14:09:02,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:09:02,827 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]=== [2020-08-21 14:09:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:02,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1679328926, now seen corresponding path program 1 times [2020-08-21 14:09:02,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:02,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2837467] [2020-08-21 14:09:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:02,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:02,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2837467] [2020-08-21 14:09:02,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:09:02,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 14:09:02,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377252854] [2020-08-21 14:09:02,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:09:02,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:02,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:09:02,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:09:02,921 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 6 states. [2020-08-21 14:09:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:03,203 INFO L93 Difference]: Finished difference Result 207 states and 241 transitions. [2020-08-21 14:09:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:09:03,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 14:09:03,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:03,205 INFO L225 Difference]: With dead ends: 207 [2020-08-21 14:09:03,205 INFO L226 Difference]: Without dead ends: 145 [2020-08-21 14:09:03,207 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 [2020-08-21 14:09:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-21 14:09:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 122. [2020-08-21 14:09:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 14:09:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 142 transitions. [2020-08-21 14:09:03,216 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 142 transitions. Word has length 33 [2020-08-21 14:09:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:03,216 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 142 transitions. [2020-08-21 14:09:03,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:09:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 142 transitions. [2020-08-21 14:09:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 14:09:03,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:03,217 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] [2020-08-21 14:09:03,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:09:03,218 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]=== [2020-08-21 14:09:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1814124928, now seen corresponding path program 1 times [2020-08-21 14:09:03,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:03,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879843382] [2020-08-21 14:09:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:03,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:03,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879843382] [2020-08-21 14:09:03,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:09:03,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:09:03,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319214800] [2020-08-21 14:09:03,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:09:03,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:03,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:09:03,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:09:03,299 INFO L87 Difference]: Start difference. First operand 122 states and 142 transitions. Second operand 7 states. [2020-08-21 14:09:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:03,600 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2020-08-21 14:09:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:09:03,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-21 14:09:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:03,603 INFO L225 Difference]: With dead ends: 198 [2020-08-21 14:09:03,603 INFO L226 Difference]: Without dead ends: 178 [2020-08-21 14:09:03,604 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 [2020-08-21 14:09:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-21 14:09:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-21 14:09:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 14:09:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2020-08-21 14:09:03,613 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 33 [2020-08-21 14:09:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:03,613 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2020-08-21 14:09:03,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:09:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2020-08-21 14:09:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 14:09:03,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:03,614 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, 1, 1, 1] [2020-08-21 14:09:03,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:09:03,615 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]=== [2020-08-21 14:09:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2032979646, now seen corresponding path program 1 times [2020-08-21 14:09:03,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:03,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824027913] [2020-08-21 14:09:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:03,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 14:09:03,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824027913] [2020-08-21 14:09:03,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:09:03,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:09:03,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881353485] [2020-08-21 14:09:03,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:09:03,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:03,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:09:03,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:09:03,681 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand 6 states. [2020-08-21 14:09:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:03,936 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2020-08-21 14:09:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:09:03,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 14:09:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:03,942 INFO L225 Difference]: With dead ends: 182 [2020-08-21 14:09:03,942 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 14:09:03,943 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 [2020-08-21 14:09:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 14:09:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2020-08-21 14:09:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-21 14:09:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 179 transitions. [2020-08-21 14:09:03,952 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 179 transitions. Word has length 33 [2020-08-21 14:09:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:03,953 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 179 transitions. [2020-08-21 14:09:03,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:09:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 179 transitions. [2020-08-21 14:09:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 14:09:03,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:03,954 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] [2020-08-21 14:09:03,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:09:03,954 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]=== [2020-08-21 14:09:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:03,954 INFO L82 PathProgramCache]: Analyzing trace with hash 270360779, now seen corresponding path program 1 times [2020-08-21 14:09:03,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:03,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917571093] [2020-08-21 14:09:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:04,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:04,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917571093] [2020-08-21 14:09:04,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:09:04,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:09:04,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807055581] [2020-08-21 14:09:04,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:09:04,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:09:04,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:09:04,038 INFO L87 Difference]: Start difference. First operand 152 states and 179 transitions. Second operand 7 states. [2020-08-21 14:09:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:04,376 INFO L93 Difference]: Finished difference Result 241 states and 276 transitions. [2020-08-21 14:09:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:09:04,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-08-21 14:09:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:04,378 INFO L225 Difference]: With dead ends: 241 [2020-08-21 14:09:04,378 INFO L226 Difference]: Without dead ends: 210 [2020-08-21 14:09:04,379 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 [2020-08-21 14:09:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-21 14:09:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2020-08-21 14:09:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-08-21 14:09:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2020-08-21 14:09:04,389 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 36 [2020-08-21 14:09:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:04,389 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2020-08-21 14:09:04,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:09:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2020-08-21 14:09:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 14:09:04,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:04,390 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] [2020-08-21 14:09:04,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:09:04,391 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]=== [2020-08-21 14:09:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:04,391 INFO L82 PathProgramCache]: Analyzing trace with hash -620993698, now seen corresponding path program 1 times [2020-08-21 14:09:04,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:04,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602781442] [2020-08-21 14:09:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:04,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:04,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602781442] [2020-08-21 14:09:04,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:09:04,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:09:04,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784509739] [2020-08-21 14:09:04,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:09:04,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:04,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:09:04,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:09:04,429 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 4 states. [2020-08-21 14:09:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:04,594 INFO L93 Difference]: Finished difference Result 354 states and 437 transitions. [2020-08-21 14:09:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:09:04,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-08-21 14:09:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:04,596 INFO L225 Difference]: With dead ends: 354 [2020-08-21 14:09:04,596 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 14:09:04,598 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 [2020-08-21 14:09:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 14:09:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 218. [2020-08-21 14:09:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-08-21 14:09:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 262 transitions. [2020-08-21 14:09:04,614 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 262 transitions. Word has length 36 [2020-08-21 14:09:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:04,614 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 262 transitions. [2020-08-21 14:09:04,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:09:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 262 transitions. [2020-08-21 14:09:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 14:09:04,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:04,615 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] [2020-08-21 14:09:04,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:09:04,616 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]=== [2020-08-21 14:09:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash -366933706, now seen corresponding path program 1 times [2020-08-21 14:09:04,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:04,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444911127] [2020-08-21 14:09:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:04,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:04,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444911127] [2020-08-21 14:09:04,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:09:04,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:09:04,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165259826] [2020-08-21 14:09:04,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:09:04,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:09:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:09:04,886 INFO L87 Difference]: Start difference. First operand 218 states and 262 transitions. Second operand 10 states. [2020-08-21 14:09:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:05,645 INFO L93 Difference]: Finished difference Result 430 states and 511 transitions. [2020-08-21 14:09:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:09:05,647 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-08-21 14:09:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:05,649 INFO L225 Difference]: With dead ends: 430 [2020-08-21 14:09:05,649 INFO L226 Difference]: Without dead ends: 338 [2020-08-21 14:09:05,650 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 [2020-08-21 14:09:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-08-21 14:09:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 235. [2020-08-21 14:09:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-08-21 14:09:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2020-08-21 14:09:05,664 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 40 [2020-08-21 14:09:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:05,665 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2020-08-21 14:09:05,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:09:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2020-08-21 14:09:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 14:09:05,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:05,666 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] [2020-08-21 14:09:05,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:09:05,666 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]=== [2020-08-21 14:09:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1933888884, now seen corresponding path program 1 times [2020-08-21 14:09:05,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:05,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918470673] [2020-08-21 14:09:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:05,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:05,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918470673] [2020-08-21 14:09:05,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:09:05,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:09:05,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325243840] [2020-08-21 14:09:05,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:09:05,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:09:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:09:05,768 INFO L87 Difference]: Start difference. First operand 235 states and 282 transitions. Second operand 6 states. [2020-08-21 14:09:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:05,985 INFO L93 Difference]: Finished difference Result 353 states and 426 transitions. [2020-08-21 14:09:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:09:05,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-21 14:09:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:05,989 INFO L225 Difference]: With dead ends: 353 [2020-08-21 14:09:05,989 INFO L226 Difference]: Without dead ends: 244 [2020-08-21 14:09:05,990 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 [2020-08-21 14:09:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-21 14:09:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 237. [2020-08-21 14:09:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-21 14:09:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 284 transitions. [2020-08-21 14:09:06,005 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 284 transitions. Word has length 40 [2020-08-21 14:09:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:06,006 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 284 transitions. [2020-08-21 14:09:06,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:09:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 284 transitions. [2020-08-21 14:09:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 14:09:06,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:06,007 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] [2020-08-21 14:09:06,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 14:09:06,007 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]=== [2020-08-21 14:09:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:06,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1340010058, now seen corresponding path program 1 times [2020-08-21 14:09:06,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:06,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562456685] [2020-08-21 14:09:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:06,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:09:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:09:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:09:06,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562456685] [2020-08-21 14:09:06,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:09:06,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:09:06,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67954841] [2020-08-21 14:09:06,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:09:06,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:09:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:09:06,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:09:06,254 INFO L87 Difference]: Start difference. First operand 237 states and 284 transitions. Second operand 10 states. [2020-08-21 14:09:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:09:06,937 INFO L93 Difference]: Finished difference Result 441 states and 526 transitions. [2020-08-21 14:09:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:09:06,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-08-21 14:09:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:09:06,940 INFO L225 Difference]: With dead ends: 441 [2020-08-21 14:09:06,941 INFO L226 Difference]: Without dead ends: 349 [2020-08-21 14:09:06,942 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 [2020-08-21 14:09:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-21 14:09:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 239. [2020-08-21 14:09:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-08-21 14:09:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2020-08-21 14:09:06,958 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 40 [2020-08-21 14:09:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:09:06,959 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2020-08-21 14:09:06,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:09:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2020-08-21 14:09:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 14:09:06,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:09:06,960 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] [2020-08-21 14:09:06,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 14:09:06,961 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]=== [2020-08-21 14:09:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:09:06,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1717014481, now seen corresponding path program 1 times [2020-08-21 14:09:06,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:09:06,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337929715] [2020-08-21 14:09:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:09:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:09:06,992 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:09:06,992 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:09:06,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 14:09:07,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:09:07 BoogieIcfgContainer [2020-08-21 14:09:07,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:09:07,052 INFO L168 Benchmark]: Toolchain (without parser) took 11580.55 ms. Allocated memory was 147.3 MB in the beginning and 334.0 MB in the end (delta: 186.6 MB). Free memory was 101.9 MB in the beginning and 97.8 MB in the end (delta: 4.1 MB). Peak memory consumption was 190.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:09:07,053 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:09:07,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 676.43 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 101.7 MB in the beginning and 169.9 MB in the end (delta: -68.2 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:09:07,054 INFO L168 Benchmark]: Boogie Preprocessor took 75.11 ms. Allocated memory is still 203.9 MB. Free memory was 169.9 MB in the beginning and 166.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:09:07,055 INFO L168 Benchmark]: RCFGBuilder took 769.75 ms. Allocated memory is still 203.9 MB. Free memory was 166.5 MB in the beginning and 110.5 MB in the end (delta: 56.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:09:07,057 INFO L168 Benchmark]: TraceAbstraction took 10054.11 ms. Allocated memory was 203.9 MB in the beginning and 334.0 MB in the end (delta: 130.0 MB). Free memory was 110.5 MB in the beginning and 97.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 142.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:09:07,064 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 676.43 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 101.7 MB in the beginning and 169.9 MB in the end (delta: -68.2 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.11 ms. Allocated memory is still 203.9 MB. Free memory was 169.9 MB in the beginning and 166.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 769.75 ms. Allocated memory is still 203.9 MB. Free memory was 166.5 MB in the beginning and 110.5 MB in the end (delta: 56.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10054.11 ms. Allocated memory was 203.9 MB in the beginning and 334.0 MB in the end (delta: 130.0 MB). Free memory was 110.5 MB in the beginning and 97.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 142.8 MB. 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: 9.9s, OverallIterations: 24, TraceHistogramMax: 2, AutomataDifference: 7.0s, 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, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.0s 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, 1.8s 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...