/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/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:20:19,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:20:19,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:20:19,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:20:19,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:20:19,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:20:19,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:20:19,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:20:19,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:20:19,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:20:19,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:20:19,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:20:19,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:20:19,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:20:19,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:20:19,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:20:19,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:20:19,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:20:19,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:20:19,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:20:19,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:20:19,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:20:19,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:20:19,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:20:19,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:20:19,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:20:19,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:20:19,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:20:19,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:20:19,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:20:19,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:20:19,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:20:19,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:20:19,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:20:19,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:20:19,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:20:19,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:20:19,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:20:19,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:20:19,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:20:19,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:20:19,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:20:19,448 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:20:19,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:20:19,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:20:19,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:20:19,450 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:20:19,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:20:19,450 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:20:19,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:20:19,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:20:19,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:20:19,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:20:19,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:20:19,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:20:19,452 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:20:19,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:20:19,452 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:20:19,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:20:19,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:20:19,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:20:19,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:20:19,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:20:19,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:20:19,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:20:19,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:20:19,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:20:19,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:20:19,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:20:19,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:20:19,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:20:19,456 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 [2020-08-21 13:20:19,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:20:19,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:20:19,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:20:19,753 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:20:19,753 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:20:19,754 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-21 13:20:19,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dcdf836b/6c841fb1c5c74fcc80364b5feb8c68e1/FLAG103cd43c3 [2020-08-21 13:20:20,394 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:20:20,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-21 13:20:20,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dcdf836b/6c841fb1c5c74fcc80364b5feb8c68e1/FLAG103cd43c3 [2020-08-21 13:20:20,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dcdf836b/6c841fb1c5c74fcc80364b5feb8c68e1 [2020-08-21 13:20:20,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:20:20,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:20:20,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:20:20,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:20:20,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:20:20,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:20:20" (1/1) ... [2020-08-21 13:20:20,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e175ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:20, skipping insertion in model container [2020-08-21 13:20:20,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:20:20" (1/1) ... [2020-08-21 13:20:20,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:20:20,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:20:21,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:20:21,183 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:20:21,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:20:21,297 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:20:21,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21 WrapperNode [2020-08-21 13:20:21,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:20:21,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:20:21,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:20:21,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:20:21,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21" (1/1) ... [2020-08-21 13:20:21,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21" (1/1) ... [2020-08-21 13:20:21,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21" (1/1) ... [2020-08-21 13:20:21,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21" (1/1) ... [2020-08-21 13:20:21,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21" (1/1) ... [2020-08-21 13:20:21,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21" (1/1) ... [2020-08-21 13:20:21,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21" (1/1) ... [2020-08-21 13:20:21,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:20:21,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:20:21,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:20:21,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:20:21,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:20:21,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:20:21,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:20:21,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:20:21,445 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 13:20:21,445 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 13:20:21,445 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 13:20:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 13:20:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 13:20:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 13:20:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 13:20:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 13:20:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 13:20:21,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 13:20:21,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 13:20:21,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 13:20:21,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 13:20:21,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 13:20:21,449 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 13:20:21,449 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 13:20:21,449 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 13:20:21,450 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 13:20:21,450 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 13:20:21,450 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 13:20:21,450 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 13:20:21,450 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 13:20:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 13:20:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 13:20:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 13:20:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 13:20:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 13:20:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 13:20:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 13:20:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 13:20:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 13:20:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 13:20:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 13:20:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 13:20:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 13:20:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 13:20:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 13:20:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 13:20:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 13:20:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 13:20:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 13:20:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 13:20:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 13:20:21,455 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 13:20:21,455 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 13:20:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 13:20:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 13:20:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 13:20:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 13:20:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 13:20:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 13:20:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 13:20:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 13:20:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 13:20:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 13:20:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 13:20:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 13:20:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 13:20:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 13:20:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 13:20:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 13:20:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 13:20:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 13:20:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 13:20:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 13:20:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 13:20:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 13:20:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 13:20:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 13:20:21,461 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 13:20:21,461 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 13:20:21,461 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 13:20:21,461 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 13:20:21,462 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 13:20:21,462 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 13:20:21,462 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 13:20:21,463 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 13:20:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 13:20:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 13:20:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 13:20:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 13:20:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 13:20:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 13:20:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 13:20:21,465 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 13:20:21,465 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 13:20:21,466 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 13:20:21,466 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 13:20:21,466 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 13:20:21,466 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 13:20:21,466 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 13:20:21,466 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 13:20:21,466 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 13:20:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 13:20:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 13:20:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 13:20:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 13:20:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 13:20:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 13:20:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 13:20:21,468 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 13:20:21,468 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 13:20:21,468 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 13:20:21,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:20:21,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:20:21,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:20:21,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 13:20:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 13:20:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 13:20:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:20:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:20:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:20:22,132 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:20:22,133 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-21 13:20:22,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:20:22 BoogieIcfgContainer [2020-08-21 13:20:22,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:20:22,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:20:22,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:20:22,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:20:22,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:20:20" (1/3) ... [2020-08-21 13:20:22,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e27cb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:20:22, skipping insertion in model container [2020-08-21 13:20:22,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:20:21" (2/3) ... [2020-08-21 13:20:22,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e27cb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:20:22, skipping insertion in model container [2020-08-21 13:20:22,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:20:22" (3/3) ... [2020-08-21 13:20:22,147 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-21 13:20:22,158 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:20:22,167 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-21 13:20:22,182 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-21 13:20:22,209 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:20:22,209 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:20:22,209 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:20:22,210 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:20:22,210 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:20:22,210 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:20:22,211 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:20:22,211 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:20:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-21 13:20:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-21 13:20:22,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:22,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:22,243 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-21 13:20:22,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:22,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369407324] [2020-08-21 13:20:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:22,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:22,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369407324] [2020-08-21 13:20:22,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:22,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:20:22,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386084711] [2020-08-21 13:20:22,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:20:22,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:22,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:20:22,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:22,504 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-21 13:20:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:22,722 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-21 13:20:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:20:22,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-21 13:20:22,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:22,736 INFO L225 Difference]: With dead ends: 186 [2020-08-21 13:20:22,736 INFO L226 Difference]: Without dead ends: 99 [2020-08-21 13:20:22,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-21 13:20:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-21 13:20:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 13:20:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-21 13:20:22,790 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-21 13:20:22,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:22,790 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-21 13:20:22,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:20:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-21 13:20:22,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 13:20:22,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:22,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:22,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:20:22,792 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:22,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-21 13:20:22,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:22,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383707123] [2020-08-21 13:20:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:22,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:22,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383707123] [2020-08-21 13:20:22,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:22,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:20:22,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061635794] [2020-08-21 13:20:22,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:20:22,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:22,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:20:22,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:22,877 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-21 13:20:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:23,026 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-21 13:20:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:20:23,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 13:20:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:23,028 INFO L225 Difference]: With dead ends: 84 [2020-08-21 13:20:23,028 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 13:20:23,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 13:20:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-21 13:20:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 13:20:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-21 13:20:23,041 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-21 13:20:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:23,042 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-21 13:20:23,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:20:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-21 13:20:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 13:20:23,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:23,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:23,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:20:23,043 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:23,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-21 13:20:23,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:23,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652114326] [2020-08-21 13:20:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:23,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:23,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652114326] [2020-08-21 13:20:23,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:23,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:20:23,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101384149] [2020-08-21 13:20:23,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:20:23,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:20:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:20:23,122 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-21 13:20:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:23,340 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-21 13:20:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:20:23,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 13:20:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:23,342 INFO L225 Difference]: With dead ends: 138 [2020-08-21 13:20:23,342 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 13:20:23,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:20:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 13:20:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-21 13:20:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 13:20:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-21 13:20:23,354 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-21 13:20:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:23,354 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-21 13:20:23,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:20:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-21 13:20:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 13:20:23,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:23,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:23,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:20:23,356 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-21 13:20:23,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:23,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691628310] [2020-08-21 13:20:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:23,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:23,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691628310] [2020-08-21 13:20:23,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:23,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:20:23,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746368665] [2020-08-21 13:20:23,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:20:23,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:23,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:20:23,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:20:23,471 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-21 13:20:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:23,640 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-21 13:20:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:20:23,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 13:20:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:23,642 INFO L225 Difference]: With dead ends: 84 [2020-08-21 13:20:23,642 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 13:20:23,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:20:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 13:20:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-21 13:20:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 13:20:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-21 13:20:23,651 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-21 13:20:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:23,651 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-21 13:20:23,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:20:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-21 13:20:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:20:23,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:23,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:23,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:20:23,653 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:23,653 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-21 13:20:23,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:23,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834746703] [2020-08-21 13:20:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:23,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:23,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834746703] [2020-08-21 13:20:23,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:23,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:20:23,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636839914] [2020-08-21 13:20:23,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:20:23,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:23,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:20:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:20:23,792 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-21 13:20:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:23,999 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-21 13:20:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:20:23,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-21 13:20:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:24,002 INFO L225 Difference]: With dead ends: 199 [2020-08-21 13:20:24,002 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 13:20:24,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:20:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 13:20:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-21 13:20:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 13:20:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-21 13:20:24,014 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-21 13:20:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:24,014 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-21 13:20:24,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:20:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-21 13:20:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:20:24,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:24,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:24,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:20:24,016 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:24,016 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-21 13:20:24,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:24,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592141883] [2020-08-21 13:20:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:24,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592141883] [2020-08-21 13:20:24,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:24,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:20:24,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696489558] [2020-08-21 13:20:24,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:20:24,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:24,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:20:24,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:20:24,091 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-21 13:20:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:24,295 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-21 13:20:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:20:24,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 13:20:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:24,296 INFO L225 Difference]: With dead ends: 126 [2020-08-21 13:20:24,297 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 13:20:24,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:20:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 13:20:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-21 13:20:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 13:20:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-21 13:20:24,304 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-21 13:20:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:24,305 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-21 13:20:24,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:20:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-21 13:20:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 13:20:24,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:24,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:24,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:20:24,306 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-21 13:20:24,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:24,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386177846] [2020-08-21 13:20:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:24,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386177846] [2020-08-21 13:20:24,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:24,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:20:24,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549413474] [2020-08-21 13:20:24,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:20:24,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:24,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:20:24,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:20:24,362 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-21 13:20:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:24,545 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-21 13:20:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:20:24,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 13:20:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:24,546 INFO L225 Difference]: With dead ends: 136 [2020-08-21 13:20:24,546 INFO L226 Difference]: Without dead ends: 116 [2020-08-21 13:20:24,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:20:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-21 13:20:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-21 13:20:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 13:20:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-21 13:20:24,554 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-21 13:20:24,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:24,554 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-21 13:20:24,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:20:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-21 13:20:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 13:20:24,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:24,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:24,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:20:24,556 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:24,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-21 13:20:24,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:24,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692529244] [2020-08-21 13:20:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:24,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692529244] [2020-08-21 13:20:24,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:24,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:20:24,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705878811] [2020-08-21 13:20:24,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:20:24,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:24,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:20:24,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:24,600 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-21 13:20:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:24,740 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-21 13:20:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:20:24,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-21 13:20:24,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:24,742 INFO L225 Difference]: With dead ends: 141 [2020-08-21 13:20:24,742 INFO L226 Difference]: Without dead ends: 100 [2020-08-21 13:20:24,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-21 13:20:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-21 13:20:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 13:20:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-21 13:20:24,758 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-21 13:20:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:24,759 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-21 13:20:24,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:20:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-21 13:20:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:20:24,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:24,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:24,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:20:24,761 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:24,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-21 13:20:24,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:24,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566238661] [2020-08-21 13:20:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:24,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566238661] [2020-08-21 13:20:24,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:24,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:20:24,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454281784] [2020-08-21 13:20:24,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:20:24,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:20:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:24,828 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-21 13:20:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:24,936 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-21 13:20:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:20:24,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-21 13:20:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:24,937 INFO L225 Difference]: With dead ends: 79 [2020-08-21 13:20:24,937 INFO L226 Difference]: Without dead ends: 77 [2020-08-21 13:20:24,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-21 13:20:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-21 13:20:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 13:20:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-21 13:20:24,944 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-21 13:20:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:24,944 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-21 13:20:24,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:20:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-21 13:20:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 13:20:24,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:24,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:24,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:20:24,946 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:24,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-21 13:20:24,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:24,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173158368] [2020-08-21 13:20:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:24,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173158368] [2020-08-21 13:20:24,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:24,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:20:24,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372224452] [2020-08-21 13:20:25,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:20:25,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:25,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:20:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:20:25,000 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-21 13:20:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:25,123 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-21 13:20:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:20:25,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 13:20:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:25,124 INFO L225 Difference]: With dead ends: 78 [2020-08-21 13:20:25,124 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 13:20:25,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:20:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 13:20:25,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-21 13:20:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 13:20:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-21 13:20:25,130 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-21 13:20:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:25,130 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-21 13:20:25,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:20:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-21 13:20:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 13:20:25,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:25,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:25,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:20:25,132 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:25,132 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-21 13:20:25,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:25,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071795738] [2020-08-21 13:20:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:25,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:25,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071795738] [2020-08-21 13:20:25,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:25,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:20:25,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628148392] [2020-08-21 13:20:25,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:20:25,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:20:25,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:20:25,211 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-21 13:20:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:25,513 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-21 13:20:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:20:25,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 13:20:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:25,515 INFO L225 Difference]: With dead ends: 179 [2020-08-21 13:20:25,515 INFO L226 Difference]: Without dead ends: 137 [2020-08-21 13:20:25,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:20:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-21 13:20:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-21 13:20:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 13:20:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-21 13:20:25,525 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-21 13:20:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:25,525 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-21 13:20:25,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:20:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-21 13:20:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 13:20:25,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:25,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:25,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:20:25,527 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-21 13:20:25,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:25,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804836052] [2020-08-21 13:20:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:25,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:20:25,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804836052] [2020-08-21 13:20:25,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:25,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 13:20:25,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469301744] [2020-08-21 13:20:25,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:20:25,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:25,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:20:25,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:20:25,874 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-21 13:20:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:26,607 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-21 13:20:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 13:20:26,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-21 13:20:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:26,613 INFO L225 Difference]: With dead ends: 182 [2020-08-21 13:20:26,613 INFO L226 Difference]: Without dead ends: 180 [2020-08-21 13:20:26,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:20:26,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-21 13:20:26,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-21 13:20:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 13:20:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-21 13:20:26,623 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-21 13:20:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:26,623 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-21 13:20:26,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:20:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-21 13:20:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 13:20:26,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:26,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:26,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:20:26,625 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-21 13:20:26,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:26,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206381212] [2020-08-21 13:20:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:26,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 13:20:26,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206381212] [2020-08-21 13:20:26,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:26,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:20:26,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32365415] [2020-08-21 13:20:26,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:20:26,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:20:26,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:20:26,684 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-21 13:20:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:26,896 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-21 13:20:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:20:26,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-21 13:20:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:26,898 INFO L225 Difference]: With dead ends: 150 [2020-08-21 13:20:26,898 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 13:20:26,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:20:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 13:20:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-21 13:20:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 13:20:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-21 13:20:26,907 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-21 13:20:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:26,907 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-21 13:20:26,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:20:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-21 13:20:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 13:20:26,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:26,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:26,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:20:26,915 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-21 13:20:26,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:26,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323805199] [2020-08-21 13:20:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:26,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:20:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:20:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 13:20:26,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323805199] [2020-08-21 13:20:26,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:20:26,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:20:26,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728429188] [2020-08-21 13:20:26,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:20:26,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:20:26,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:20:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:26,977 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-21 13:20:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:20:27,109 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-21 13:20:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:20:27,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-21 13:20:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:20:27,110 INFO L225 Difference]: With dead ends: 124 [2020-08-21 13:20:27,110 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 13:20:27,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:20:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 13:20:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-21 13:20:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 13:20:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-21 13:20:27,120 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-21 13:20:27,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:20:27,120 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-21 13:20:27,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:20:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-21 13:20:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 13:20:27,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:20:27,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:20:27,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:20:27,122 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:20:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:20:27,123 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-21 13:20:27,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:20:27,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646953263] [2020-08-21 13:20:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:20:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 13:20:27,139 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 13:20:27,140 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 13:20:27,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:20:27,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:20:27 BoogieIcfgContainer [2020-08-21 13:20:27,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:20:27,164 INFO L168 Benchmark]: Toolchain (without parser) took 6476.44 ms. Allocated memory was 140.5 MB in the beginning and 283.6 MB in the end (delta: 143.1 MB). Free memory was 102.1 MB in the beginning and 190.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:27,165 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 13:20:27,165 INFO L168 Benchmark]: CACSL2BoogieTranslator took 609.98 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 169.4 MB in the end (delta: -67.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:27,166 INFO L168 Benchmark]: Boogie Preprocessor took 79.34 ms. Allocated memory is still 203.4 MB. Free memory was 169.4 MB in the beginning and 166.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:27,167 INFO L168 Benchmark]: RCFGBuilder took 760.22 ms. Allocated memory is still 203.4 MB. Free memory was 166.1 MB in the beginning and 110.2 MB in the end (delta: 55.9 MB). Peak memory consumption was 55.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:20:27,167 INFO L168 Benchmark]: TraceAbstraction took 5022.09 ms. Allocated memory was 203.4 MB in the beginning and 283.6 MB in the end (delta: 80.2 MB). Free memory was 109.5 MB in the beginning and 190.3 MB in the end (delta: -80.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:20:27,170 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 609.98 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 169.4 MB in the end (delta: -67.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 79.34 ms. Allocated memory is still 203.4 MB. Free memory was 169.4 MB in the beginning and 166.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 760.22 ms. Allocated memory is still 203.4 MB. Free memory was 166.1 MB in the beginning and 110.2 MB in the end (delta: 55.9 MB). Peak memory consumption was 55.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5022.09 ms. Allocated memory was 203.4 MB in the beginning and 283.6 MB in the end (delta: 80.2 MB). Free memory was 109.5 MB in the beginning and 190.3 MB in the end (delta: -80.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) [L995] COND FALSE !(!(list != ((void*)0))) [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list [L1015] COND FALSE !(!(((void*)0) != end)) [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner [L1023] COND TRUE len == 0 [L1024] len = 1 [L1027] COND FALSE !(!(((void*)0) != inner)) [L1028] EXPR inner->inner [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1016 SDtfs, 1075 SDslu, 1380 SDs, 0 SdLazy, 1834 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 367 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 49886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 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...