/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:29:18,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:29:18,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:29:18,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:29:18,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:29:18,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:29:18,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:29:18,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:29:18,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:29:18,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:29:18,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:29:18,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:29:18,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:29:18,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:29:18,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:29:18,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:29:18,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:29:18,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:29:18,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:29:18,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:29:18,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:29:18,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:29:18,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:29:18,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:29:18,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 17:29:18,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 17:29:18,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 17:29:18,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 17:29:18,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 17:29:18,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 17:29:18,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:29:18,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:29:18,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:29:18,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:29:18,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:29:18,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:29:18,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:29:18,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:29:18,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:29:18,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:29:18,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:29:18,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:29:18,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:29:18,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:29:18,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:29:18,460 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:29:18,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:29:18,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:29:18,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:29:18,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:29:18,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:29:18,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:29:18,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:29:18,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:29:18,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:29:18,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:29:18,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:29:18,464 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:29:18,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:29:18,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:29:18,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:29:18,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:29:18,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:29:18,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:29:18,467 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-07-17 17:29:18,745 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:29:18,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:29:18,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:29:18,763 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:29:18,764 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:29:18,765 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-17 17:29:18,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d73e8bf0/6703d389e0e149bf9f69db42dd1a4923/FLAGf2778a46d [2020-07-17 17:29:19,389 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:29:19,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-17 17:29:19,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d73e8bf0/6703d389e0e149bf9f69db42dd1a4923/FLAGf2778a46d [2020-07-17 17:29:19,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d73e8bf0/6703d389e0e149bf9f69db42dd1a4923 [2020-07-17 17:29:19,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:29:19,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:29:19,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:29:19,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:29:19,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:29:19,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:29:19" (1/1) ... [2020-07-17 17:29:19,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b42804f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:19, skipping insertion in model container [2020-07-17 17:29:19,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:29:19" (1/1) ... [2020-07-17 17:29:19,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:29:19,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:29:20,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:29:20,163 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:29:20,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:29:20,271 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:29:20,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20 WrapperNode [2020-07-17 17:29:20,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:29:20,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:29:20,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:29:20,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:29:20,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20" (1/1) ... [2020-07-17 17:29:20,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20" (1/1) ... [2020-07-17 17:29:20,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20" (1/1) ... [2020-07-17 17:29:20,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20" (1/1) ... [2020-07-17 17:29:20,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20" (1/1) ... [2020-07-17 17:29:20,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20" (1/1) ... [2020-07-17 17:29:20,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20" (1/1) ... [2020-07-17 17:29:20,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:29:20,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:29:20,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:29:20,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:29:20,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 17:29:20,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:29:20,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:29:20,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-17 17:29:20,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-17 17:29:20,448 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-17 17:29:20,448 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-07-17 17:29:20,448 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-07-17 17:29:20,448 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-07-17 17:29:20,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:29:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:29:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:29:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-17 17:29:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-17 17:29:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-17 17:29:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-17 17:29:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-17 17:29:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-17 17:29:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-17 17:29:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-17 17:29:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-17 17:29:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-17 17:29:20,451 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-17 17:29:20,451 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-17 17:29:20,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-17 17:29:20,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-17 17:29:20,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-17 17:29:20,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-17 17:29:20,452 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-17 17:29:20,452 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-17 17:29:20,453 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-17 17:29:20,453 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-17 17:29:20,453 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-17 17:29:20,453 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-17 17:29:20,453 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-17 17:29:20,453 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-17 17:29:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-17 17:29:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-17 17:29:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-17 17:29:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-17 17:29:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-17 17:29:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-17 17:29:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-17 17:29:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-17 17:29:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-17 17:29:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-17 17:29:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-17 17:29:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-17 17:29:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-17 17:29:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-17 17:29:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-17 17:29:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-17 17:29:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-17 17:29:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-17 17:29:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-17 17:29:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-17 17:29:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-17 17:29:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-17 17:29:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-17 17:29:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-17 17:29:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-17 17:29:20,457 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-17 17:29:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-17 17:29:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-17 17:29:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 17:29:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-17 17:29:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-17 17:29:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-17 17:29:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-17 17:29:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-17 17:29:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-17 17:29:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-17 17:29:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-17 17:29:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 17:29:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-17 17:29:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-17 17:29:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-17 17:29:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-17 17:29:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-17 17:29:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-17 17:29:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-17 17:29:20,461 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-17 17:29:20,461 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-17 17:29:20,461 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-17 17:29:20,461 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-17 17:29:20,461 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-17 17:29:20,461 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-17 17:29:20,461 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-17 17:29:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-17 17:29:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-17 17:29:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-17 17:29:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-17 17:29:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-17 17:29:20,462 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-17 17:29:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-17 17:29:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-17 17:29:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-17 17:29:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-17 17:29:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-17 17:29:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-17 17:29:20,463 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-17 17:29:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-17 17:29:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-17 17:29:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-17 17:29:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-17 17:29:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-17 17:29:20,464 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-17 17:29:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-17 17:29:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-17 17:29:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-17 17:29:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-17 17:29:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-17 17:29:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-17 17:29:20,465 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-17 17:29:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-17 17:29:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-17 17:29:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-17 17:29:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-17 17:29:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-07-17 17:29:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 17:29:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 17:29:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-07-17 17:29:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 17:29:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-07-17 17:29:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 17:29:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:29:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:29:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:29:20,839 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-17 17:29:20,986 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:29:20,986 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-17 17:29:20,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:29:20 BoogieIcfgContainer [2020-07-17 17:29:20,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:29:20,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:29:20,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:29:20,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:29:20,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:29:19" (1/3) ... [2020-07-17 17:29:20,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd2ce08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:29:20, skipping insertion in model container [2020-07-17 17:29:20,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:29:20" (2/3) ... [2020-07-17 17:29:20,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd2ce08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:29:20, skipping insertion in model container [2020-07-17 17:29:20,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:29:20" (3/3) ... [2020-07-17 17:29:21,000 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-07-17 17:29:21,011 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:29:21,020 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:29:21,034 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:29:21,057 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:29:21,057 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:29:21,057 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:29:21,058 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:29:21,058 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:29:21,058 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:29:21,058 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:29:21,058 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:29:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-07-17 17:29:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 17:29:21,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:21,094 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] [2020-07-17 17:29:21,095 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1731717969, now seen corresponding path program 1 times [2020-07-17 17:29:21,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:21,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136026207] [2020-07-17 17:29:21,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:29:21,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136026207] [2020-07-17 17:29:21,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:29:21,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 17:29:21,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354422198] [2020-07-17 17:29:21,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 17:29:21,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 17:29:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 17:29:21,405 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 4 states. [2020-07-17 17:29:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:21,732 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2020-07-17 17:29:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 17:29:21,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-07-17 17:29:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:21,750 INFO L225 Difference]: With dead ends: 154 [2020-07-17 17:29:21,750 INFO L226 Difference]: Without dead ends: 68 [2020-07-17 17:29:21,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:29:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-17 17:29:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-07-17 17:29:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 17:29:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-07-17 17:29:21,845 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 29 [2020-07-17 17:29:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:21,845 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-07-17 17:29:21,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 17:29:21,846 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-07-17 17:29:21,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 17:29:21,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:21,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:21,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:29:21,849 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash 632987872, now seen corresponding path program 1 times [2020-07-17 17:29:21,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:21,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579639072] [2020-07-17 17:29:21,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:29:22,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579639072] [2020-07-17 17:29:22,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:29:22,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 17:29:22,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655180348] [2020-07-17 17:29:22,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:29:22,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:22,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:29:22,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:29:22,013 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 6 states. [2020-07-17 17:29:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:22,340 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2020-07-17 17:29:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:29:22,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-07-17 17:29:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:22,343 INFO L225 Difference]: With dead ends: 143 [2020-07-17 17:29:22,343 INFO L226 Difference]: Without dead ends: 96 [2020-07-17 17:29:22,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:29:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-17 17:29:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2020-07-17 17:29:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-17 17:29:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-07-17 17:29:22,359 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 33 [2020-07-17 17:29:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:22,360 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-07-17 17:29:22,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:29:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-07-17 17:29:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 17:29:22,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:22,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:22,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:29:22,362 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:22,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:22,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1134974621, now seen corresponding path program 1 times [2020-07-17 17:29:22,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:22,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771031192] [2020-07-17 17:29:22,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:29:22,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771031192] [2020-07-17 17:29:22,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:29:22,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 17:29:22,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548416545] [2020-07-17 17:29:22,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:29:22,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:22,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:29:22,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:29:22,517 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 7 states. [2020-07-17 17:29:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:22,895 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-07-17 17:29:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:29:22,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-07-17 17:29:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:22,898 INFO L225 Difference]: With dead ends: 114 [2020-07-17 17:29:22,899 INFO L226 Difference]: Without dead ends: 94 [2020-07-17 17:29:22,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:29:22,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-17 17:29:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-07-17 17:29:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-17 17:29:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-07-17 17:29:22,925 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 35 [2020-07-17 17:29:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:22,929 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-07-17 17:29:22,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:29:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-07-17 17:29:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-17 17:29:22,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:22,937 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:22,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:29:22,944 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash 226602169, now seen corresponding path program 1 times [2020-07-17 17:29:22,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:22,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011046994] [2020-07-17 17:29:22,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:29:23,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011046994] [2020-07-17 17:29:23,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:29:23,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:29:23,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859151098] [2020-07-17 17:29:23,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:29:23,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:29:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:29:23,058 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 8 states. [2020-07-17 17:29:23,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:23,504 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2020-07-17 17:29:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 17:29:23,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-07-17 17:29:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:23,510 INFO L225 Difference]: With dead ends: 168 [2020-07-17 17:29:23,510 INFO L226 Difference]: Without dead ends: 117 [2020-07-17 17:29:23,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:29:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-17 17:29:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2020-07-17 17:29:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-17 17:29:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-07-17 17:29:23,539 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 43 [2020-07-17 17:29:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:23,540 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-07-17 17:29:23,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:29:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-07-17 17:29:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-17 17:29:23,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:23,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:23,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:29:23,547 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash 360366586, now seen corresponding path program 1 times [2020-07-17 17:29:23,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:23,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654811266] [2020-07-17 17:29:23,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:29:23,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654811266] [2020-07-17 17:29:23,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:29:23,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-17 17:29:23,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377637451] [2020-07-17 17:29:23,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:29:23,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:29:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:29:23,771 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 12 states. [2020-07-17 17:29:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:24,301 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-07-17 17:29:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 17:29:24,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-07-17 17:29:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:24,305 INFO L225 Difference]: With dead ends: 101 [2020-07-17 17:29:24,305 INFO L226 Difference]: Without dead ends: 96 [2020-07-17 17:29:24,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-07-17 17:29:24,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-17 17:29:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-07-17 17:29:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-17 17:29:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-07-17 17:29:24,332 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 44 [2020-07-17 17:29:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:24,332 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-07-17 17:29:24,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:29:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-07-17 17:29:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-17 17:29:24,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:24,334 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:24,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:29:24,334 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash -829611268, now seen corresponding path program 1 times [2020-07-17 17:29:24,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:24,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465187157] [2020-07-17 17:29:24,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:29:24,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465187157] [2020-07-17 17:29:24,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:29:24,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 17:29:24,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893294140] [2020-07-17 17:29:24,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:29:24,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:29:24,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:29:24,434 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 9 states. [2020-07-17 17:29:24,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:24,840 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2020-07-17 17:29:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 17:29:24,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-07-17 17:29:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:24,845 INFO L225 Difference]: With dead ends: 117 [2020-07-17 17:29:24,845 INFO L226 Difference]: Without dead ends: 87 [2020-07-17 17:29:24,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:29:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-17 17:29:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-07-17 17:29:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-17 17:29:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-07-17 17:29:24,860 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 45 [2020-07-17 17:29:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:24,860 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-07-17 17:29:24,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:29:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-07-17 17:29:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 17:29:24,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:24,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:24,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:29:24,862 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:24,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash -642872939, now seen corresponding path program 1 times [2020-07-17 17:29:24,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:24,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685620125] [2020-07-17 17:29:24,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:29:24,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685620125] [2020-07-17 17:29:24,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:29:24,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:29:24,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041822375] [2020-07-17 17:29:24,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:29:24,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:29:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:29:25,000 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 9 states. [2020-07-17 17:29:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:25,292 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2020-07-17 17:29:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:29:25,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-07-17 17:29:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:25,294 INFO L225 Difference]: With dead ends: 120 [2020-07-17 17:29:25,294 INFO L226 Difference]: Without dead ends: 99 [2020-07-17 17:29:25,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-07-17 17:29:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-17 17:29:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2020-07-17 17:29:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-17 17:29:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-07-17 17:29:25,311 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 51 [2020-07-17 17:29:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:25,312 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-07-17 17:29:25,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:29:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-07-17 17:29:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-17 17:29:25,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:25,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:25,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:29:25,314 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:25,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1372689452, now seen corresponding path program 2 times [2020-07-17 17:29:25,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:25,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176656111] [2020-07-17 17:29:25,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:29:25,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176656111] [2020-07-17 17:29:25,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:29:25,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 17:29:25,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539275847] [2020-07-17 17:29:25,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 17:29:25,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:25,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 17:29:25,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:29:25,456 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 11 states. [2020-07-17 17:29:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:25,790 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-07-17 17:29:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 17:29:25,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-07-17 17:29:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:25,792 INFO L225 Difference]: With dead ends: 132 [2020-07-17 17:29:25,792 INFO L226 Difference]: Without dead ends: 111 [2020-07-17 17:29:25,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:29:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-07-17 17:29:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2020-07-17 17:29:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-17 17:29:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-07-17 17:29:25,824 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 60 [2020-07-17 17:29:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:25,825 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-07-17 17:29:25,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 17:29:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-07-17 17:29:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-17 17:29:25,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:25,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:25,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:29:25,828 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1521110738, now seen corresponding path program 1 times [2020-07-17 17:29:25,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:25,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138903475] [2020-07-17 17:29:25,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:29:26,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138903475] [2020-07-17 17:29:26,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:29:26,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 17:29:26,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070750055] [2020-07-17 17:29:26,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 17:29:26,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:26,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 17:29:26,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:29:26,016 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 11 states. [2020-07-17 17:29:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:26,432 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2020-07-17 17:29:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 17:29:26,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-07-17 17:29:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:26,435 INFO L225 Difference]: With dead ends: 125 [2020-07-17 17:29:26,435 INFO L226 Difference]: Without dead ends: 101 [2020-07-17 17:29:26,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:29:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-17 17:29:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-07-17 17:29:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-17 17:29:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-07-17 17:29:26,459 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 61 [2020-07-17 17:29:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:26,460 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-07-17 17:29:26,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 17:29:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-07-17 17:29:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-17 17:29:26,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:26,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:26,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:29:26,462 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:26,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:26,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1187742581, now seen corresponding path program 3 times [2020-07-17 17:29:26,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:26,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791363168] [2020-07-17 17:29:26,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 17:29:26,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791363168] [2020-07-17 17:29:26,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:29:26,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-17 17:29:26,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61955513] [2020-07-17 17:29:26,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 17:29:26,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:26,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 17:29:26,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:29:26,771 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 16 states. [2020-07-17 17:29:27,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:27,536 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-07-17 17:29:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 17:29:27,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-07-17 17:29:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:27,538 INFO L225 Difference]: With dead ends: 113 [2020-07-17 17:29:27,538 INFO L226 Difference]: Without dead ends: 105 [2020-07-17 17:29:27,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-07-17 17:29:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-17 17:29:27,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-07-17 17:29:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-17 17:29:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-07-17 17:29:27,554 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 69 [2020-07-17 17:29:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:27,554 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-07-17 17:29:27,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 17:29:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-07-17 17:29:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-17 17:29:27,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:27,556 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:27,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:29:27,556 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:27,557 INFO L82 PathProgramCache]: Analyzing trace with hash 979580858, now seen corresponding path program 4 times [2020-07-17 17:29:27,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:27,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507483275] [2020-07-17 17:29:27,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-17 17:29:27,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507483275] [2020-07-17 17:29:27,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:29:27,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:29:27,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802974706] [2020-07-17 17:29:27,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:29:27,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:27,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:29:27,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:29:27,841 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 12 states. [2020-07-17 17:29:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:28,423 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2020-07-17 17:29:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 17:29:28,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-07-17 17:29:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:28,425 INFO L225 Difference]: With dead ends: 125 [2020-07-17 17:29:28,426 INFO L226 Difference]: Without dead ends: 120 [2020-07-17 17:29:28,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-17 17:29:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-17 17:29:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2020-07-17 17:29:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-17 17:29:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-07-17 17:29:28,452 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 76 [2020-07-17 17:29:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:28,452 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-07-17 17:29:28,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:29:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-07-17 17:29:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-17 17:29:28,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:28,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:28,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:29:28,458 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:28,459 INFO L82 PathProgramCache]: Analyzing trace with hash -446623556, now seen corresponding path program 2 times [2020-07-17 17:29:28,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:28,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764568938] [2020-07-17 17:29:28,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:29:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 17:29:28,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764568938] [2020-07-17 17:29:28,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:29:28,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 17:29:28,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749896252] [2020-07-17 17:29:28,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 17:29:28,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:29:28,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 17:29:28,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:29:28,628 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 13 states. [2020-07-17 17:29:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:29:29,177 INFO L93 Difference]: Finished difference Result 163 states and 171 transitions. [2020-07-17 17:29:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 17:29:29,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-07-17 17:29:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:29:29,179 INFO L225 Difference]: With dead ends: 163 [2020-07-17 17:29:29,179 INFO L226 Difference]: Without dead ends: 122 [2020-07-17 17:29:29,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-07-17 17:29:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-17 17:29:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2020-07-17 17:29:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-17 17:29:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-07-17 17:29:29,196 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 77 [2020-07-17 17:29:29,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:29:29,196 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-07-17 17:29:29,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 17:29:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-07-17 17:29:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-17 17:29:29,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:29:29,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:29:29,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:29:29,198 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:29:29,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:29:29,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1305863211, now seen corresponding path program 5 times [2020-07-17 17:29:29,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:29:29,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719088746] [2020-07-17 17:29:29,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:29:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:29:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:29:29,287 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:29:29,288 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:29:29,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:29:29,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:29:29 BoogieIcfgContainer [2020-07-17 17:29:29,341 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:29:29,344 INFO L168 Benchmark]: Toolchain (without parser) took 9643.88 ms. Allocated memory was 141.6 MB in the beginning and 324.0 MB in the end (delta: 182.5 MB). Free memory was 101.0 MB in the beginning and 138.2 MB in the end (delta: -37.2 MB). Peak memory consumption was 145.2 MB. Max. memory is 7.1 GB. [2020-07-17 17:29:29,344 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 141.6 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 17:29:29,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 570.12 ms. Allocated memory was 141.6 MB in the beginning and 202.4 MB in the end (delta: 60.8 MB). Free memory was 100.5 MB in the beginning and 169.5 MB in the end (delta: -69.0 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-07-17 17:29:29,346 INFO L168 Benchmark]: Boogie Preprocessor took 113.03 ms. Allocated memory is still 202.4 MB. Free memory was 169.5 MB in the beginning and 166.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-07-17 17:29:29,346 INFO L168 Benchmark]: RCFGBuilder took 605.91 ms. Allocated memory is still 202.4 MB. Free memory was 166.4 MB in the beginning and 120.8 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. [2020-07-17 17:29:29,347 INFO L168 Benchmark]: TraceAbstraction took 8348.26 ms. Allocated memory was 202.4 MB in the beginning and 324.0 MB in the end (delta: 121.6 MB). Free memory was 120.1 MB in the beginning and 138.2 MB in the end (delta: -18.0 MB). Peak memory consumption was 103.6 MB. Max. memory is 7.1 GB. [2020-07-17 17:29:29,351 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 141.6 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 570.12 ms. Allocated memory was 141.6 MB in the beginning and 202.4 MB in the end (delta: 60.8 MB). Free memory was 100.5 MB in the beginning and 169.5 MB in the end (delta: -69.0 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.03 ms. Allocated memory is still 202.4 MB. Free memory was 169.5 MB in the beginning and 166.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 605.91 ms. Allocated memory is still 202.4 MB. Free memory was 166.4 MB in the beginning and 120.8 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8348.26 ms. Allocated memory was 202.4 MB in the beginning and 324.0 MB in the end (delta: 121.6 MB). Free memory was 120.1 MB in the beginning and 138.2 MB in the end (delta: -18.0 MB). Peak memory consumption was 103.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; VAL [len=2] [L593] len < 32 && __VERIFIER_nondet_int() VAL [len=2, len < 32 && __VERIFIER_nondet_int()=1] [L593] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L596] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L564] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L565] COND TRUE len > 0 VAL [\old(len)=3, head={0:0}, len=3] [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L570] new_head->next = head VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L571] head = new_head VAL [\old(len)=3, head={-1:0}, len=3, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L572] len-- VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L565] COND TRUE len > 0 VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L570] new_head->next = head VAL [\old(len)=3, head={-1:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L571] head = new_head VAL [\old(len)=3, head={-2:0}, len=2, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L572] len-- VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L565] COND TRUE len > 0 VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L570] new_head->next = head VAL [\old(len)=3, head={-2:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L571] head = new_head VAL [\old(len)=3, head={-3:0}, len=1, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L572] len-- VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L565] COND FALSE !(len > 0) VAL [\old(len)=3, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] return head; VAL [\old(len)=3, \result={-3:0}, head={-3:0}, len=0, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L596] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={-3:0}] [L596] SLL s = sll_create(len + 1); VAL [len=2, s={-3:0}, sll_create(len + 1)={-3:0}] [L597] CALL, EXPR sll_length(s) VAL [head={-3:0}] [L577] int len = 0; VAL [head={-3:0}, head={-3:0}, len=0] [L578] COND TRUE \read(head) VAL [head={-3:0}, head={-3:0}, len=0] [L579] len++ VAL [head={-3:0}, head={-3:0}, len=1] [L580] EXPR head->next VAL [head={-3:0}, head={-3:0}, head->next={-2:0}, len=1] [L580] head = head->next VAL [head={-3:0}, head={-2:0}, head->next={-2:0}, len=1] [L578] COND TRUE \read(head) VAL [head={-2:0}, head={-3:0}, len=1] [L579] len++ VAL [head={-2:0}, head={-3:0}, len=2] [L580] EXPR head->next VAL [head={-3:0}, head={-2:0}, head->next={-1:0}, len=2] [L580] head = head->next VAL [head={-1:0}, head={-3:0}, head->next={-1:0}, len=2] [L578] COND TRUE \read(head) VAL [head={-3:0}, head={-1:0}, len=2] [L579] len++ VAL [head={-3:0}, head={-1:0}, len=3] [L580] EXPR head->next VAL [head={-1:0}, head={-3:0}, head->next={0:0}, len=3] [L580] head = head->next VAL [head={0:0}, head={-3:0}, head->next={0:0}, len=3] [L578] COND FALSE !(\read(head)) VAL [head={-3:0}, head={0:0}, len=3] [L582] return len; VAL [\result=3, head={0:0}, head={-3:0}, len=3] [L597] RET, EXPR sll_length(s) VAL [len=2, s={-3:0}, sll_length(s)=3] [L597] COND TRUE len != sll_length(s) VAL [len=2, s={-3:0}, sll_length(s)=3] [L602] __VERIFIER_error() VAL [len=2, s={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.2s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 704 SDtfs, 1508 SDslu, 1670 SDs, 0 SdLazy, 3653 SolverSat, 233 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 262 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 220 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 706 NumberOfCodeBlocks, 706 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 611 ConstructedInterpolants, 0 QuantifiedInterpolants, 98952 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 81/125 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...