/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 false -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 0.1.25-89f541c [2020-08-27 21:52:09,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:52:09,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:52:09,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:52:09,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:52:09,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:52:09,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:52:09,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:52:09,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:52:09,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:52:09,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:52:09,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:52:09,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:52:09,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:52:09,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:52:09,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:52:09,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:52:09,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:52:09,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:52:09,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:52:09,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:52:09,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:52:09,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:52:09,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:52:09,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:52:09,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:52:09,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:52:09,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:52:09,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:52:09,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:52:09,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:52:09,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:52:09,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:52:09,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:52:09,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:52:09,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:52:09,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:52:09,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:52:09,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:52:09,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:52:09,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:52:09,706 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 [2020-08-27 21:52:09,771 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:52:09,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:52:09,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:52:09,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:52:09,773 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:52:09,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:52:09,776 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:52:09,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:52:09,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:52:09,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:52:09,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:52:09,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:52:09,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:52:09,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:52:09,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:52:09,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:52:09,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:52:09,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:52:09,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:52:09,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:52:09,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:52:09,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:52:09,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:52:09,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:52:09,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:52:09,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:52:09,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:52:09,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:52:09,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:52:09,781 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 -> false [2020-08-27 21:52:10,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:52:10,298 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:52:10,302 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:52:10,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:52:10,304 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:52:10,306 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-08-27 21:52:10,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6cb039c4/1ccd9a33ceac43c49f80eb1e0a7e67fc/FLAG4d7e45b0d [2020-08-27 21:52:10,985 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:52:10,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-08-27 21:52:11,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6cb039c4/1ccd9a33ceac43c49f80eb1e0a7e67fc/FLAG4d7e45b0d [2020-08-27 21:52:11,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6cb039c4/1ccd9a33ceac43c49f80eb1e0a7e67fc [2020-08-27 21:52:11,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:52:11,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:52:11,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:52:11,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:52:11,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:52:11,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:52:11" (1/1) ... [2020-08-27 21:52:11,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34fa96a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:11, skipping insertion in model container [2020-08-27 21:52:11,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:52:11" (1/1) ... [2020-08-27 21:52:11,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:52:11,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:52:11,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:52:11,908 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:52:11,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:52:12,018 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:52:12,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12 WrapperNode [2020-08-27 21:52:12,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:52:12,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:52:12,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:52:12,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:52:12,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12" (1/1) ... [2020-08-27 21:52:12,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12" (1/1) ... [2020-08-27 21:52:12,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12" (1/1) ... [2020-08-27 21:52:12,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12" (1/1) ... [2020-08-27 21:52:12,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12" (1/1) ... [2020-08-27 21:52:12,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12" (1/1) ... [2020-08-27 21:52:12,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12" (1/1) ... [2020-08-27 21:52:12,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:52:12,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:52:12,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:52:12,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:52:12,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12" (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 [2020-08-27 21:52:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:52:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:52:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:52:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-27 21:52:12,230 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-27 21:52:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-27 21:52:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-27 21:52:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-27 21:52:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-27 21:52:12,231 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-27 21:52:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-27 21:52:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-27 21:52:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-27 21:52:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-27 21:52:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-27 21:52:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-27 21:52:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-27 21:52:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-27 21:52:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-27 21:52:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-27 21:52:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-27 21:52:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-27 21:52:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-27 21:52:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-27 21:52:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-27 21:52:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-27 21:52:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-27 21:52:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-27 21:52:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-27 21:52:12,235 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-27 21:52:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-27 21:52:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-27 21:52:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-27 21:52:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-27 21:52:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-27 21:52:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-27 21:52:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-27 21:52:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-27 21:52:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-27 21:52:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-27 21:52:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-27 21:52:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-27 21:52:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-27 21:52:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-27 21:52:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-27 21:52:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-27 21:52:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-27 21:52:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-27 21:52:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-27 21:52:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-27 21:52:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-27 21:52:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-27 21:52:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-27 21:52:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:52:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-27 21:52:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-27 21:52:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-27 21:52:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-27 21:52:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-27 21:52:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-27 21:52:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-27 21:52:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-27 21:52:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-27 21:52:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-27 21:52:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-27 21:52:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-27 21:52:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-27 21:52:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-27 21:52:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-27 21:52:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-27 21:52:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-27 21:52:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-27 21:52:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-27 21:52:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-27 21:52:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-27 21:52:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-27 21:52:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-27 21:52:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-27 21:52:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-27 21:52:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-27 21:52:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-27 21:52:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-27 21:52:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-27 21:52:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-27 21:52:12,244 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-27 21:52:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-27 21:52:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-27 21:52:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-27 21:52:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-27 21:52:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-27 21:52:12,245 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-27 21:52:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-27 21:52:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-27 21:52:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-27 21:52:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-27 21:52:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-27 21:52:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-27 21:52:12,246 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-27 21:52:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-27 21:52:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-27 21:52:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-27 21:52:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-27 21:52:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-27 21:52:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-27 21:52:12,247 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-27 21:52:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-27 21:52:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:52:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:52:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:52:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:52:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-27 21:52:12,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-27 21:52:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:52:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:52:12,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:52:12,912 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:52:12,913 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-27 21:52:12,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:52:12 BoogieIcfgContainer [2020-08-27 21:52:12,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:52:12,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:52:12,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:52:12,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:52:12,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:52:11" (1/3) ... [2020-08-27 21:52:12,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600c1c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:52:12, skipping insertion in model container [2020-08-27 21:52:12,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:12" (2/3) ... [2020-08-27 21:52:12,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600c1c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:52:12, skipping insertion in model container [2020-08-27 21:52:12,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:52:12" (3/3) ... [2020-08-27 21:52:12,928 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-08-27 21:52:12,940 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:52:12,951 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-27 21:52:12,975 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-27 21:52:13,008 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:52:13,009 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:52:13,009 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:52:13,009 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:52:13,009 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:52:13,009 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:52:13,010 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:52:13,010 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:52:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-08-27 21:52:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-27 21:52:13,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:13,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:13,048 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]=== [2020-08-27 21:52:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash 11193106, now seen corresponding path program 1 times [2020-08-27 21:52:13,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:13,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597758463] [2020-08-27 21:52:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:13,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:13,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597758463] [2020-08-27 21:52:13,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:13,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:13,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304234355] [2020-08-27 21:52:13,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:52:13,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:13,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:52:13,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:13,423 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 4 states. [2020-08-27 21:52:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:13,760 INFO L93 Difference]: Finished difference Result 188 states and 306 transitions. [2020-08-27 21:52:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:52:13,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-27 21:52:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:13,780 INFO L225 Difference]: With dead ends: 188 [2020-08-27 21:52:13,781 INFO L226 Difference]: Without dead ends: 100 [2020-08-27 21:52:13,788 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 [2020-08-27 21:52:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-27 21:52:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-08-27 21:52:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-27 21:52:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-08-27 21:52:13,873 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 8 [2020-08-27 21:52:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:13,873 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-08-27 21:52:13,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:52:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-08-27 21:52:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-27 21:52:13,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:13,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:13,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:52:13,876 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]=== [2020-08-27 21:52:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash -648207140, now seen corresponding path program 1 times [2020-08-27 21:52:13,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:13,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024073251] [2020-08-27 21:52:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:13,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:13,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024073251] [2020-08-27 21:52:13,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:13,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:13,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703868166] [2020-08-27 21:52:13,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:52:13,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:52:13,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:13,987 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 4 states. [2020-08-27 21:52:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:14,132 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-08-27 21:52:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:52:14,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-27 21:52:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:14,134 INFO L225 Difference]: With dead ends: 85 [2020-08-27 21:52:14,134 INFO L226 Difference]: Without dead ends: 83 [2020-08-27 21:52:14,135 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 [2020-08-27 21:52:14,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-27 21:52:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-08-27 21:52:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-27 21:52:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-08-27 21:52:14,146 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 14 [2020-08-27 21:52:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:14,146 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-08-27 21:52:14,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:52:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-08-27 21:52:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-27 21:52:14,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:14,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:14,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:52:14,148 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]=== [2020-08-27 21:52:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash -648205218, now seen corresponding path program 1 times [2020-08-27 21:52:14,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:14,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15954695] [2020-08-27 21:52:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:14,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:14,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15954695] [2020-08-27 21:52:14,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:14,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:52:14,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117645597] [2020-08-27 21:52:14,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:52:14,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:52:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:52:14,236 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 5 states. [2020-08-27 21:52:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:14,512 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2020-08-27 21:52:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:52:14,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-27 21:52:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:14,515 INFO L225 Difference]: With dead ends: 140 [2020-08-27 21:52:14,515 INFO L226 Difference]: Without dead ends: 138 [2020-08-27 21:52:14,516 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 [2020-08-27 21:52:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-27 21:52:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2020-08-27 21:52:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-27 21:52:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-27 21:52:14,527 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 14 [2020-08-27 21:52:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:14,527 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-27 21:52:14,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:52:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-27 21:52:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-27 21:52:14,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:14,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:14,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:52:14,529 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]=== [2020-08-27 21:52:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:14,530 INFO L82 PathProgramCache]: Analyzing trace with hash -646358176, now seen corresponding path program 1 times [2020-08-27 21:52:14,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:14,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604014557] [2020-08-27 21:52:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:14,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:14,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604014557] [2020-08-27 21:52:14,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:14,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:52:14,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299297662] [2020-08-27 21:52:14,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:52:14,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:14,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:52:14,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:52:14,616 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 5 states. [2020-08-27 21:52:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:14,852 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-08-27 21:52:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:52:14,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-27 21:52:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:14,854 INFO L225 Difference]: With dead ends: 85 [2020-08-27 21:52:14,855 INFO L226 Difference]: Without dead ends: 83 [2020-08-27 21:52:14,855 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 [2020-08-27 21:52:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-27 21:52:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-08-27 21:52:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-27 21:52:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2020-08-27 21:52:14,863 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 14 [2020-08-27 21:52:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:14,863 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2020-08-27 21:52:14,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:52:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2020-08-27 21:52:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:52:14,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:14,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:14,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:52:14,865 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]=== [2020-08-27 21:52:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1093009051, now seen corresponding path program 1 times [2020-08-27 21:52:14,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:14,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928896850] [2020-08-27 21:52:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:14,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:14,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928896850] [2020-08-27 21:52:14,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:14,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:14,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594605953] [2020-08-27 21:52:14,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:52:14,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:52:14,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:14,950 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 4 states. [2020-08-27 21:52:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:15,114 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-08-27 21:52:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:52:15,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-27 21:52:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:15,118 INFO L225 Difference]: With dead ends: 83 [2020-08-27 21:52:15,118 INFO L226 Difference]: Without dead ends: 79 [2020-08-27 21:52:15,118 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 [2020-08-27 21:52:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-27 21:52:15,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-08-27 21:52:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-27 21:52:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-08-27 21:52:15,131 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 19 [2020-08-27 21:52:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:15,131 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-08-27 21:52:15,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:52:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-08-27 21:52:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:52:15,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:15,132 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] [2020-08-27 21:52:15,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:52:15,133 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]=== [2020-08-27 21:52:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash -476453587, now seen corresponding path program 1 times [2020-08-27 21:52:15,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:15,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119709970] [2020-08-27 21:52:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:15,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119709970] [2020-08-27 21:52:15,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:15,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:52:15,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741539497] [2020-08-27 21:52:15,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:52:15,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:15,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:52:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:52:15,230 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 6 states. [2020-08-27 21:52:15,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:15,425 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2020-08-27 21:52:15,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:52:15,426 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-27 21:52:15,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:15,427 INFO L225 Difference]: With dead ends: 136 [2020-08-27 21:52:15,428 INFO L226 Difference]: Without dead ends: 116 [2020-08-27 21:52:15,428 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 [2020-08-27 21:52:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-27 21:52:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2020-08-27 21:52:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-27 21:52:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-27 21:52:15,436 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 20 [2020-08-27 21:52:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:15,437 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-27 21:52:15,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:52:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-27 21:52:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:52:15,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:15,438 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] [2020-08-27 21:52:15,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:52:15,439 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]=== [2020-08-27 21:52:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:15,440 INFO L82 PathProgramCache]: Analyzing trace with hash 337242584, now seen corresponding path program 1 times [2020-08-27 21:52:15,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:15,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085395879] [2020-08-27 21:52:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:15,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085395879] [2020-08-27 21:52:15,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:15,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:15,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649034502] [2020-08-27 21:52:15,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:52:15,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:52:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:15,492 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 4 states. [2020-08-27 21:52:15,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:15,641 INFO L93 Difference]: Finished difference Result 141 states and 161 transitions. [2020-08-27 21:52:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:52:15,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-27 21:52:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:15,643 INFO L225 Difference]: With dead ends: 141 [2020-08-27 21:52:15,643 INFO L226 Difference]: Without dead ends: 99 [2020-08-27 21:52:15,644 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 [2020-08-27 21:52:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-27 21:52:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2020-08-27 21:52:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-27 21:52:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-08-27 21:52:15,651 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 24 [2020-08-27 21:52:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:15,652 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-08-27 21:52:15,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:52:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-08-27 21:52:15,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:52:15,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:15,653 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] [2020-08-27 21:52:15,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:52:15,654 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]=== [2020-08-27 21:52:15,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:15,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1864575058, now seen corresponding path program 1 times [2020-08-27 21:52:15,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:15,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985411719] [2020-08-27 21:52:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:15,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985411719] [2020-08-27 21:52:15,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:15,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:15,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007016366] [2020-08-27 21:52:15,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:52:15,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:52:15,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:15,718 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 4 states. [2020-08-27 21:52:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:15,873 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-08-27 21:52:15,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:52:15,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-27 21:52:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:15,874 INFO L225 Difference]: With dead ends: 78 [2020-08-27 21:52:15,874 INFO L226 Difference]: Without dead ends: 76 [2020-08-27 21:52:15,875 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 [2020-08-27 21:52:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-27 21:52:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-08-27 21:52:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-27 21:52:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-27 21:52:15,885 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 25 [2020-08-27 21:52:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:15,886 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-27 21:52:15,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:52:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-27 21:52:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:52:15,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:15,889 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] [2020-08-27 21:52:15,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:52:15,890 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]=== [2020-08-27 21:52:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:15,891 INFO L82 PathProgramCache]: Analyzing trace with hash -660297045, now seen corresponding path program 1 times [2020-08-27 21:52:15,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:15,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438108886] [2020-08-27 21:52:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:15,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438108886] [2020-08-27 21:52:15,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:15,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:52:15,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365334848] [2020-08-27 21:52:15,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:52:15,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:15,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:52:15,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:52:15,979 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 5 states. [2020-08-27 21:52:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:16,179 INFO L93 Difference]: Finished difference Result 194 states and 222 transitions. [2020-08-27 21:52:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:52:16,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-27 21:52:16,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:16,181 INFO L225 Difference]: With dead ends: 194 [2020-08-27 21:52:16,181 INFO L226 Difference]: Without dead ends: 130 [2020-08-27 21:52:16,182 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 [2020-08-27 21:52:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-27 21:52:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 78. [2020-08-27 21:52:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-27 21:52:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-08-27 21:52:16,188 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 27 [2020-08-27 21:52:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:16,188 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-08-27 21:52:16,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:52:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-08-27 21:52:16,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:52:16,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:16,190 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] [2020-08-27 21:52:16,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:52:16,190 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]=== [2020-08-27 21:52:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1681365399, now seen corresponding path program 1 times [2020-08-27 21:52:16,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:16,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819289290] [2020-08-27 21:52:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:16,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:16,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819289290] [2020-08-27 21:52:16,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:16,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:52:16,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513361304] [2020-08-27 21:52:16,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:52:16,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:16,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:52:16,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:52:16,253 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 5 states. [2020-08-27 21:52:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:16,410 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-08-27 21:52:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:52:16,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-27 21:52:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:16,412 INFO L225 Difference]: With dead ends: 79 [2020-08-27 21:52:16,413 INFO L226 Difference]: Without dead ends: 77 [2020-08-27 21:52:16,413 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 [2020-08-27 21:52:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-27 21:52:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-08-27 21:52:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-27 21:52:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-27 21:52:16,418 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 27 [2020-08-27 21:52:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:16,419 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-27 21:52:16,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:52:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-27 21:52:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:52:16,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:16,420 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] [2020-08-27 21:52:16,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:52:16,420 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]=== [2020-08-27 21:52:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash -840739825, now seen corresponding path program 1 times [2020-08-27 21:52:16,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:16,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071312186] [2020-08-27 21:52:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:16,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:16,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071312186] [2020-08-27 21:52:16,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:16,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:52:16,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408457795] [2020-08-27 21:52:16,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:52:16,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:16,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:52:16,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:52:16,508 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 6 states. [2020-08-27 21:52:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:16,836 INFO L93 Difference]: Finished difference Result 182 states and 209 transitions. [2020-08-27 21:52:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:52:16,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-27 21:52:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:16,837 INFO L225 Difference]: With dead ends: 182 [2020-08-27 21:52:16,837 INFO L226 Difference]: Without dead ends: 139 [2020-08-27 21:52:16,838 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 [2020-08-27 21:52:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-27 21:52:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2020-08-27 21:52:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-27 21:52:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2020-08-27 21:52:16,843 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 28 [2020-08-27 21:52:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:16,843 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2020-08-27 21:52:16,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:52:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2020-08-27 21:52:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-27 21:52:16,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:16,847 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] [2020-08-27 21:52:16,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:52:16,848 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]=== [2020-08-27 21:52:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash -941335665, now seen corresponding path program 1 times [2020-08-27 21:52:16,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:16,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83032478] [2020-08-27 21:52:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:17,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:17,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83032478] [2020-08-27 21:52:17,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:17,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-27 21:52:17,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66236711] [2020-08-27 21:52:17,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:52:17,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:52:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:52:17,117 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 8 states. [2020-08-27 21:52:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:17,876 INFO L93 Difference]: Finished difference Result 237 states and 265 transitions. [2020-08-27 21:52:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-27 21:52:17,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-27 21:52:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:17,881 INFO L225 Difference]: With dead ends: 237 [2020-08-27 21:52:17,881 INFO L226 Difference]: Without dead ends: 235 [2020-08-27 21:52:17,882 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 [2020-08-27 21:52:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-27 21:52:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 98. [2020-08-27 21:52:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-27 21:52:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-08-27 21:52:17,895 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 28 [2020-08-27 21:52:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:17,897 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-08-27 21:52:17,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:52:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-08-27 21:52:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-27 21:52:17,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:17,903 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] [2020-08-27 21:52:17,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:52:17,903 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]=== [2020-08-27 21:52:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:17,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1932526751, now seen corresponding path program 1 times [2020-08-27 21:52:17,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:17,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533732742] [2020-08-27 21:52:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:17,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:52:18,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533732742] [2020-08-27 21:52:18,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:18,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:52:18,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550112123] [2020-08-27 21:52:18,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:52:18,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:18,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:52:18,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:52:18,031 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 5 states. [2020-08-27 21:52:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:18,245 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2020-08-27 21:52:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:52:18,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-27 21:52:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:18,246 INFO L225 Difference]: With dead ends: 145 [2020-08-27 21:52:18,247 INFO L226 Difference]: Without dead ends: 127 [2020-08-27 21:52:18,247 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 [2020-08-27 21:52:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-08-27 21:52:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-08-27 21:52:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-27 21:52:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2020-08-27 21:52:18,255 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 30 [2020-08-27 21:52:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:18,255 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2020-08-27 21:52:18,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:52:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2020-08-27 21:52:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-27 21:52:18,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:18,257 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] [2020-08-27 21:52:18,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:52:18,258 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]=== [2020-08-27 21:52:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:18,258 INFO L82 PathProgramCache]: Analyzing trace with hash -250794977, now seen corresponding path program 1 times [2020-08-27 21:52:18,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:18,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625996039] [2020-08-27 21:52:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:18,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:52:18,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625996039] [2020-08-27 21:52:18,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:18,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:18,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702703154] [2020-08-27 21:52:18,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:52:18,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:18,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:52:18,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:18,317 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 4 states. [2020-08-27 21:52:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:18,475 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2020-08-27 21:52:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:52:18,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-27 21:52:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:18,477 INFO L225 Difference]: With dead ends: 119 [2020-08-27 21:52:18,477 INFO L226 Difference]: Without dead ends: 117 [2020-08-27 21:52:18,478 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 [2020-08-27 21:52:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-08-27 21:52:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-08-27 21:52:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-27 21:52:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2020-08-27 21:52:18,485 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 30 [2020-08-27 21:52:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:18,485 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2020-08-27 21:52:18,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:52:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2020-08-27 21:52:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-27 21:52:18,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:18,486 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] [2020-08-27 21:52:18,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:52:18,487 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]=== [2020-08-27 21:52:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:18,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1485208190, now seen corresponding path program 1 times [2020-08-27 21:52:18,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:18,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915080909] [2020-08-27 21:52:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:18,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:18,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915080909] [2020-08-27 21:52:18,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:18,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-27 21:52:18,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426268644] [2020-08-27 21:52:18,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:52:18,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:18,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:52:18,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:52:18,725 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand 8 states. [2020-08-27 21:52:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:19,431 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2020-08-27 21:52:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-27 21:52:19,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-27 21:52:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:19,433 INFO L225 Difference]: With dead ends: 240 [2020-08-27 21:52:19,433 INFO L226 Difference]: Without dead ends: 238 [2020-08-27 21:52:19,434 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 [2020-08-27 21:52:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-27 21:52:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 120. [2020-08-27 21:52:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-27 21:52:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-08-27 21:52:19,444 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 31 [2020-08-27 21:52:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:19,444 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-08-27 21:52:19,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:52:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-08-27 21:52:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-27 21:52:19,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:19,445 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] [2020-08-27 21:52:19,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:52:19,446 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]=== [2020-08-27 21:52:19,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:19,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1679328926, now seen corresponding path program 1 times [2020-08-27 21:52:19,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:19,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635259398] [2020-08-27 21:52:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:19,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:19,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635259398] [2020-08-27 21:52:19,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:19,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-27 21:52:19,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208334795] [2020-08-27 21:52:19,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:52:19,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:19,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:52:19,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:52:19,528 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 6 states. [2020-08-27 21:52:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:19,827 INFO L93 Difference]: Finished difference Result 207 states and 241 transitions. [2020-08-27 21:52:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:52:19,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-27 21:52:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:19,828 INFO L225 Difference]: With dead ends: 207 [2020-08-27 21:52:19,829 INFO L226 Difference]: Without dead ends: 145 [2020-08-27 21:52:19,829 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 [2020-08-27 21:52:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-27 21:52:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 122. [2020-08-27 21:52:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-27 21:52:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 142 transitions. [2020-08-27 21:52:19,837 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 142 transitions. Word has length 33 [2020-08-27 21:52:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:19,838 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 142 transitions. [2020-08-27 21:52:19,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:52:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 142 transitions. [2020-08-27 21:52:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-27 21:52:19,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:19,839 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] [2020-08-27 21:52:19,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-27 21:52:19,839 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]=== [2020-08-27 21:52:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1814124928, now seen corresponding path program 1 times [2020-08-27 21:52:19,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:19,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228747094] [2020-08-27 21:52:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:19,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:19,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228747094] [2020-08-27 21:52:19,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:19,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-27 21:52:19,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327879869] [2020-08-27 21:52:19,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:52:19,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:52:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:52:19,934 INFO L87 Difference]: Start difference. First operand 122 states and 142 transitions. Second operand 7 states. [2020-08-27 21:52:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:20,243 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2020-08-27 21:52:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:52:20,243 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-27 21:52:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:20,245 INFO L225 Difference]: With dead ends: 198 [2020-08-27 21:52:20,245 INFO L226 Difference]: Without dead ends: 178 [2020-08-27 21:52:20,248 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 [2020-08-27 21:52:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-27 21:52:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-27 21:52:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-27 21:52:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2020-08-27 21:52:20,257 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 33 [2020-08-27 21:52:20,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:20,257 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2020-08-27 21:52:20,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:52:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2020-08-27 21:52:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-27 21:52:20,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:20,259 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] [2020-08-27 21:52:20,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-27 21:52:20,259 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]=== [2020-08-27 21:52:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:20,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2032979646, now seen corresponding path program 1 times [2020-08-27 21:52:20,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:20,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658810547] [2020-08-27 21:52:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:20,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:52:20,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658810547] [2020-08-27 21:52:20,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:20,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:52:20,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400633347] [2020-08-27 21:52:20,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:52:20,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:20,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:52:20,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:52:20,348 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand 6 states. [2020-08-27 21:52:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:20,581 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2020-08-27 21:52:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:52:20,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-27 21:52:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:20,582 INFO L225 Difference]: With dead ends: 182 [2020-08-27 21:52:20,583 INFO L226 Difference]: Without dead ends: 166 [2020-08-27 21:52:20,583 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 [2020-08-27 21:52:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-27 21:52:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2020-08-27 21:52:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-27 21:52:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 179 transitions. [2020-08-27 21:52:20,593 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 179 transitions. Word has length 33 [2020-08-27 21:52:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:20,593 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 179 transitions. [2020-08-27 21:52:20,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:52:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 179 transitions. [2020-08-27 21:52:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-27 21:52:20,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:20,594 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] [2020-08-27 21:52:20,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-27 21:52:20,595 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]=== [2020-08-27 21:52:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash 270360779, now seen corresponding path program 1 times [2020-08-27 21:52:20,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:20,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104686150] [2020-08-27 21:52:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:20,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:20,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104686150] [2020-08-27 21:52:20,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:20,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:52:20,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241764017] [2020-08-27 21:52:20,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:52:20,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:20,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:52:20,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:52:20,671 INFO L87 Difference]: Start difference. First operand 152 states and 179 transitions. Second operand 7 states. [2020-08-27 21:52:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:21,039 INFO L93 Difference]: Finished difference Result 241 states and 276 transitions. [2020-08-27 21:52:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:52:21,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-08-27 21:52:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:21,041 INFO L225 Difference]: With dead ends: 241 [2020-08-27 21:52:21,042 INFO L226 Difference]: Without dead ends: 210 [2020-08-27 21:52:21,042 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 [2020-08-27 21:52:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-27 21:52:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2020-08-27 21:52:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-08-27 21:52:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2020-08-27 21:52:21,052 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 36 [2020-08-27 21:52:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:21,053 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2020-08-27 21:52:21,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:52:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2020-08-27 21:52:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-27 21:52:21,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:21,054 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] [2020-08-27 21:52:21,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-27 21:52:21,054 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]=== [2020-08-27 21:52:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash -620993698, now seen corresponding path program 1 times [2020-08-27 21:52:21,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:21,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680155215] [2020-08-27 21:52:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:21,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:21,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680155215] [2020-08-27 21:52:21,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:21,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:21,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879145718] [2020-08-27 21:52:21,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:52:21,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:21,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:52:21,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:52:21,107 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 4 states. [2020-08-27 21:52:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:21,261 INFO L93 Difference]: Finished difference Result 354 states and 437 transitions. [2020-08-27 21:52:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:52:21,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-08-27 21:52:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:21,263 INFO L225 Difference]: With dead ends: 354 [2020-08-27 21:52:21,263 INFO L226 Difference]: Without dead ends: 258 [2020-08-27 21:52:21,264 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 [2020-08-27 21:52:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-27 21:52:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 218. [2020-08-27 21:52:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-08-27 21:52:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 262 transitions. [2020-08-27 21:52:21,275 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 262 transitions. Word has length 36 [2020-08-27 21:52:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:21,276 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 262 transitions. [2020-08-27 21:52:21,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:52:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 262 transitions. [2020-08-27 21:52:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-27 21:52:21,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:21,277 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] [2020-08-27 21:52:21,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-27 21:52:21,277 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]=== [2020-08-27 21:52:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:21,278 INFO L82 PathProgramCache]: Analyzing trace with hash -366933706, now seen corresponding path program 1 times [2020-08-27 21:52:21,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:21,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217668249] [2020-08-27 21:52:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:21,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:21,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217668249] [2020-08-27 21:52:21,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:21,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:52:21,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625506493] [2020-08-27 21:52:21,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:52:21,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:52:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:52:21,608 INFO L87 Difference]: Start difference. First operand 218 states and 262 transitions. Second operand 10 states. [2020-08-27 21:52:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:22,420 INFO L93 Difference]: Finished difference Result 430 states and 511 transitions. [2020-08-27 21:52:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-27 21:52:22,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-08-27 21:52:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:22,423 INFO L225 Difference]: With dead ends: 430 [2020-08-27 21:52:22,423 INFO L226 Difference]: Without dead ends: 338 [2020-08-27 21:52:22,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-08-27 21:52:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-08-27 21:52:22,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 235. [2020-08-27 21:52:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-08-27 21:52:22,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 282 transitions. [2020-08-27 21:52:22,437 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 282 transitions. Word has length 40 [2020-08-27 21:52:22,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:22,438 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 282 transitions. [2020-08-27 21:52:22,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:52:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 282 transitions. [2020-08-27 21:52:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-27 21:52:22,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:22,439 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] [2020-08-27 21:52:22,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-27 21:52:22,439 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]=== [2020-08-27 21:52:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1933888884, now seen corresponding path program 1 times [2020-08-27 21:52:22,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:22,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52721604] [2020-08-27 21:52:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:22,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:22,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52721604] [2020-08-27 21:52:22,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:22,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:52:22,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348983264] [2020-08-27 21:52:22,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:52:22,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:52:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:52:22,508 INFO L87 Difference]: Start difference. First operand 235 states and 282 transitions. Second operand 6 states. [2020-08-27 21:52:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:22,749 INFO L93 Difference]: Finished difference Result 353 states and 426 transitions. [2020-08-27 21:52:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:52:22,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-27 21:52:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:22,753 INFO L225 Difference]: With dead ends: 353 [2020-08-27 21:52:22,753 INFO L226 Difference]: Without dead ends: 244 [2020-08-27 21:52:22,754 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 [2020-08-27 21:52:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-27 21:52:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 237. [2020-08-27 21:52:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-27 21:52:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 284 transitions. [2020-08-27 21:52:22,767 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 284 transitions. Word has length 40 [2020-08-27 21:52:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:22,767 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 284 transitions. [2020-08-27 21:52:22,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:52:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 284 transitions. [2020-08-27 21:52:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-27 21:52:22,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:22,769 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] [2020-08-27 21:52:22,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-27 21:52:22,769 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]=== [2020-08-27 21:52:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:22,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1340010058, now seen corresponding path program 1 times [2020-08-27 21:52:22,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:22,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713334276] [2020-08-27 21:52:22,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:23,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:23,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713334276] [2020-08-27 21:52:23,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:23,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:52:23,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498825796] [2020-08-27 21:52:23,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:52:23,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:23,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:52:23,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:52:23,116 INFO L87 Difference]: Start difference. First operand 237 states and 284 transitions. Second operand 10 states. [2020-08-27 21:52:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:23,879 INFO L93 Difference]: Finished difference Result 441 states and 526 transitions. [2020-08-27 21:52:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-27 21:52:23,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-08-27 21:52:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:23,882 INFO L225 Difference]: With dead ends: 441 [2020-08-27 21:52:23,882 INFO L226 Difference]: Without dead ends: 349 [2020-08-27 21:52:23,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-08-27 21:52:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-27 21:52:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 239. [2020-08-27 21:52:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-08-27 21:52:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2020-08-27 21:52:23,899 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 40 [2020-08-27 21:52:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:23,899 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2020-08-27 21:52:23,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:52:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2020-08-27 21:52:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-27 21:52:23,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:23,900 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] [2020-08-27 21:52:23,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-27 21:52:23,900 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]=== [2020-08-27 21:52:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:23,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1717014481, now seen corresponding path program 1 times [2020-08-27 21:52:23,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:23,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743776952] [2020-08-27 21:52:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:52:23,923 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:52:23,923 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:52:23,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-27 21:52:23,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:52:23 BoogieIcfgContainer [2020-08-27 21:52:23,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:52:23,955 INFO L168 Benchmark]: Toolchain (without parser) took 12673.44 ms. Allocated memory was 141.6 MB in the beginning and 319.3 MB in the end (delta: 177.7 MB). Free memory was 102.5 MB in the beginning and 190.0 MB in the end (delta: -87.4 MB). Peak memory consumption was 90.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:23,956 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:52:23,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 737.70 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 102.3 MB in the beginning and 171.6 MB in the end (delta: -69.3 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:23,957 INFO L168 Benchmark]: Boogie Preprocessor took 126.63 ms. Allocated memory is still 205.0 MB. Free memory was 171.6 MB in the beginning and 168.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:23,957 INFO L168 Benchmark]: RCFGBuilder took 771.27 ms. Allocated memory is still 205.0 MB. Free memory was 168.5 MB in the beginning and 112.6 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:23,958 INFO L168 Benchmark]: TraceAbstraction took 11032.34 ms. Allocated memory was 205.0 MB in the beginning and 319.3 MB in the end (delta: 114.3 MB). Free memory was 112.6 MB in the beginning and 190.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. [2020-08-27 21:52:23,960 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 737.70 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 102.3 MB in the beginning and 171.6 MB in the end (delta: -69.3 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.63 ms. Allocated memory is still 205.0 MB. Free memory was 171.6 MB in the beginning and 168.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 771.27 ms. Allocated memory is still 205.0 MB. Free memory was 168.5 MB in the beginning and 112.6 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11032.34 ms. Allocated memory was 205.0 MB in the beginning and 319.3 MB in the end (delta: 114.3 MB). Free memory was 112.6 MB in the beginning and 190.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 37.0 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: 10.9s, OverallIterations: 24, TraceHistogramMax: 2, AutomataDifference: 7.4s, 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, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.3s 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, 0.3s SatisfiabilityAnalysisTime, 2.1s 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...