/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 0.1.25-3af5e1f [2020-09-04 22:08:31,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:08:31,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:08:31,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 22:08:31,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 22:08:31,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 22:08:31,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 22:08:31,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 22:08:31,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 22:08:31,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 22:08:31,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 22:08:31,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 22:08:31,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:08:31,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:08:31,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:08:31,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:08:31,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:08:31,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:08:31,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:08:31,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:08:31,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:08:31,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:08:31,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:08:31,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:08:31,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 22:08:31,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 22:08:31,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 22:08:31,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 22:08:31,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 22:08:31,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 22:08:31,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 22:08:31,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 22:08:31,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 22:08:31,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 22:08:31,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 22:08:31,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 22:08:31,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 22:08:31,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 22:08:31,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:08:31,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:08:31,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:08:31,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 22:08:31,803 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:08:31,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:08:31,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:08:31,805 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:08:31,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:08:31,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:08:31,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:08:31,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:08:31,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:08:31,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:08:31,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:08:31,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:08:31,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:08:31,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:08:31,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:08:31,808 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:08:31,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:08:31,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:08:31,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:08:31,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:08:31,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:08:31,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:08:31,809 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 [2020-09-04 22:08:32,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:08:32,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:08:32,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:08:32,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:08:32,273 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:08:32,274 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-04 22:08:32,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af1847d18/9cc794f6b14441ac9ff0ab8a7178119f/FLAG31aa1690a [2020-09-04 22:08:32,971 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:08:32,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-04 22:08:32,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af1847d18/9cc794f6b14441ac9ff0ab8a7178119f/FLAG31aa1690a [2020-09-04 22:08:33,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af1847d18/9cc794f6b14441ac9ff0ab8a7178119f [2020-09-04 22:08:33,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:08:33,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:08:33,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:08:33,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:08:33,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:08:33,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:08:33" (1/1) ... [2020-09-04 22:08:33,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@391177e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33, skipping insertion in model container [2020-09-04 22:08:33,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:08:33" (1/1) ... [2020-09-04 22:08:33,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:08:33,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:08:33,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:08:33,788 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:08:33,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:08:33,891 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:08:33,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33 WrapperNode [2020-09-04 22:08:33,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:08:33,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:08:33,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:08:33,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:08:33,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33" (1/1) ... [2020-09-04 22:08:33,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33" (1/1) ... [2020-09-04 22:08:33,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33" (1/1) ... [2020-09-04 22:08:33,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33" (1/1) ... [2020-09-04 22:08:33,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33" (1/1) ... [2020-09-04 22:08:33,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33" (1/1) ... [2020-09-04 22:08:33,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33" (1/1) ... [2020-09-04 22:08:33,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:08:33,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:08:33,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:08:33,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:08:33,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:08:34,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:08:34,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:08:34,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 22:08:34,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 22:08:34,056 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 22:08:34,056 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-04 22:08:34,056 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-04 22:08:34,057 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-04 22:08:34,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:08:34,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:08:34,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 22:08:34,058 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 22:08:34,058 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 22:08:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 22:08:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 22:08:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 22:08:34,060 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 22:08:34,060 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 22:08:34,060 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 22:08:34,061 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 22:08:34,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 22:08:34,062 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 22:08:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 22:08:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 22:08:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 22:08:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 22:08:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 22:08:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 22:08:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 22:08:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 22:08:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 22:08:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 22:08:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 22:08:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 22:08:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 22:08:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 22:08:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 22:08:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 22:08:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 22:08:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 22:08:34,067 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 22:08:34,067 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 22:08:34,067 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 22:08:34,067 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 22:08:34,067 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 22:08:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 22:08:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 22:08:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 22:08:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 22:08:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 22:08:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 22:08:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 22:08:34,069 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 22:08:34,069 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 22:08:34,069 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 22:08:34,069 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 22:08:34,069 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 22:08:34,069 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 22:08:34,069 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 22:08:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 22:08:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 22:08:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 22:08:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 22:08:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 22:08:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 22:08:34,071 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 22:08:34,071 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 22:08:34,071 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 22:08:34,071 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 22:08:34,071 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 22:08:34,071 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 22:08:34,071 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 22:08:34,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 22:08:34,072 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 22:08:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 22:08:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 22:08:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 22:08:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 22:08:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 22:08:34,074 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 22:08:34,074 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 22:08:34,075 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 22:08:34,075 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 22:08:34,075 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 22:08:34,075 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 22:08:34,075 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 22:08:34,076 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 22:08:34,076 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 22:08:34,077 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 22:08:34,077 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 22:08:34,077 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 22:08:34,077 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 22:08:34,077 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 22:08:34,078 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 22:08:34,078 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 22:08:34,078 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 22:08:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 22:08:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 22:08:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 22:08:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 22:08:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 22:08:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 22:08:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 22:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 22:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 22:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 22:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 22:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 22:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 22:08:34,081 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 22:08:34,081 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 22:08:34,081 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 22:08:34,081 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 22:08:34,081 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 22:08:34,081 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 22:08:34,081 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 22:08:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 22:08:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-04 22:08:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 22:08:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 22:08:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-04 22:08:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 22:08:34,082 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-04 22:08:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 22:08:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:08:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:08:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:08:34,405 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 22:08:34,601 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:08:34,602 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-04 22:08:34,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:08:34 BoogieIcfgContainer [2020-09-04 22:08:34,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:08:34,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:08:34,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:08:34,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:08:34,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:08:33" (1/3) ... [2020-09-04 22:08:34,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc03d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:08:34, skipping insertion in model container [2020-09-04 22:08:34,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:08:33" (2/3) ... [2020-09-04 22:08:34,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc03d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:08:34, skipping insertion in model container [2020-09-04 22:08:34,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:08:34" (3/3) ... [2020-09-04 22:08:34,617 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-09-04 22:08:34,628 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:08:34,638 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:08:34,659 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:08:34,683 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:08:34,683 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:08:34,683 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:08:34,683 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:08:34,683 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:08:34,684 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:08:34,684 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:08:34,684 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:08:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-09-04 22:08:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 22:08:34,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:34,718 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] [2020-09-04 22:08:34,719 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1731717969, now seen corresponding path program 1 times [2020-09-04 22:08:34,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:34,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172226475] [2020-09-04 22:08:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:34,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:34,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 22:08:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:34,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-04 22:08:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:35,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172226475] [2020-09-04 22:08:35,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:08:35,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 22:08:35,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583991857] [2020-09-04 22:08:35,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 22:08:35,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:35,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 22:08:35,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 22:08:35,041 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 4 states. [2020-09-04 22:08:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:35,323 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2020-09-04 22:08:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 22:08:35,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-04 22:08:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:35,343 INFO L225 Difference]: With dead ends: 154 [2020-09-04 22:08:35,344 INFO L226 Difference]: Without dead ends: 68 [2020-09-04 22:08:35,351 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 [2020-09-04 22:08:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-04 22:08:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-09-04 22:08:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 22:08:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-04 22:08:35,440 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 29 [2020-09-04 22:08:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:35,441 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-04 22:08:35,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 22:08:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-04 22:08:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 22:08:35,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:35,443 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] [2020-09-04 22:08:35,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:08:35,444 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:35,445 INFO L82 PathProgramCache]: Analyzing trace with hash 632987872, now seen corresponding path program 1 times [2020-09-04 22:08:35,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:35,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253223327] [2020-09-04 22:08:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:35,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:35,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-04 22:08:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:35,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-04 22:08:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:35,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253223327] [2020-09-04 22:08:35,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:08:35,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 22:08:35,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650517926] [2020-09-04 22:08:35,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 22:08:35,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:35,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 22:08:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 22:08:35,657 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 6 states. [2020-09-04 22:08:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:35,984 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2020-09-04 22:08:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 22:08:35,984 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-04 22:08:35,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:35,986 INFO L225 Difference]: With dead ends: 143 [2020-09-04 22:08:35,987 INFO L226 Difference]: Without dead ends: 96 [2020-09-04 22:08:35,988 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 [2020-09-04 22:08:35,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-04 22:08:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2020-09-04 22:08:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 22:08:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-04 22:08:36,013 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 33 [2020-09-04 22:08:36,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:36,013 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-04 22:08:36,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 22:08:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-04 22:08:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 22:08:36,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:36,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:08:36,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:08:36,016 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1134974621, now seen corresponding path program 1 times [2020-09-04 22:08:36,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:36,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810728091] [2020-09-04 22:08:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:36,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:36,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 22:08:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:36,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-04 22:08:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:36,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810728091] [2020-09-04 22:08:36,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:08:36,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:08:36,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239516788] [2020-09-04 22:08:36,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:08:36,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:36,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:08:36,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:08:36,232 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 7 states. [2020-09-04 22:08:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:36,624 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-09-04 22:08:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 22:08:36,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-04 22:08:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:36,629 INFO L225 Difference]: With dead ends: 114 [2020-09-04 22:08:36,629 INFO L226 Difference]: Without dead ends: 94 [2020-09-04 22:08:36,630 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 [2020-09-04 22:08:36,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-04 22:08:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-09-04 22:08:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-04 22:08:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-09-04 22:08:36,657 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 35 [2020-09-04 22:08:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:36,658 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-09-04 22:08:36,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:08:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-09-04 22:08:36,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 22:08:36,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:36,666 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:08:36,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:08:36,667 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:36,667 INFO L82 PathProgramCache]: Analyzing trace with hash 226602169, now seen corresponding path program 1 times [2020-09-04 22:08:36,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:36,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823854062] [2020-09-04 22:08:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:36,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:36,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:08:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:36,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-04 22:08:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:36,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823854062] [2020-09-04 22:08:36,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:36,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 22:08:36,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102695537] [2020-09-04 22:08:36,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 22:08:36,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:36,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 22:08:36,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:08:36,815 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 8 states. [2020-09-04 22:08:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:37,286 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2020-09-04 22:08:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 22:08:37,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-09-04 22:08:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:37,289 INFO L225 Difference]: With dead ends: 168 [2020-09-04 22:08:37,289 INFO L226 Difference]: Without dead ends: 117 [2020-09-04 22:08:37,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:08:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-04 22:08:37,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2020-09-04 22:08:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 22:08:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-09-04 22:08:37,312 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 43 [2020-09-04 22:08:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:37,312 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-09-04 22:08:37,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 22:08:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-09-04 22:08:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 22:08:37,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:37,314 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] [2020-09-04 22:08:37,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 22:08:37,315 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash 360366586, now seen corresponding path program 1 times [2020-09-04 22:08:37,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:37,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019098522] [2020-09-04 22:08:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:37,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:37,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 22:08:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:37,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 22:08:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:37,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019098522] [2020-09-04 22:08:37,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:08:37,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 22:08:37,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752958749] [2020-09-04 22:08:37,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 22:08:37,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:37,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 22:08:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:08:37,543 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 12 states. [2020-09-04 22:08:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:38,160 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-09-04 22:08:38,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 22:08:38,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-09-04 22:08:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:38,165 INFO L225 Difference]: With dead ends: 101 [2020-09-04 22:08:38,165 INFO L226 Difference]: Without dead ends: 96 [2020-09-04 22:08:38,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-09-04 22:08:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-04 22:08:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-04 22:08:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-04 22:08:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-09-04 22:08:38,187 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 44 [2020-09-04 22:08:38,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:38,188 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-09-04 22:08:38,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 22:08:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-09-04 22:08:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-04 22:08:38,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:38,189 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] [2020-09-04 22:08:38,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 22:08:38,190 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:38,190 INFO L82 PathProgramCache]: Analyzing trace with hash -829611268, now seen corresponding path program 1 times [2020-09-04 22:08:38,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:38,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395489859] [2020-09-04 22:08:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:38,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:38,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 22:08:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:38,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 22:08:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:38,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395489859] [2020-09-04 22:08:38,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:08:38,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 22:08:38,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034081010] [2020-09-04 22:08:38,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 22:08:38,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:38,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 22:08:38,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 22:08:38,306 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 9 states. [2020-09-04 22:08:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:38,734 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2020-09-04 22:08:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 22:08:38,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-09-04 22:08:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:38,737 INFO L225 Difference]: With dead ends: 117 [2020-09-04 22:08:38,737 INFO L226 Difference]: Without dead ends: 87 [2020-09-04 22:08:38,738 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 [2020-09-04 22:08:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-04 22:08:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-09-04 22:08:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 22:08:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-09-04 22:08:38,753 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 45 [2020-09-04 22:08:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:38,753 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-09-04 22:08:38,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 22:08:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-09-04 22:08:38,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 22:08:38,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:38,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:08:38,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 22:08:38,755 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:38,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:38,755 INFO L82 PathProgramCache]: Analyzing trace with hash -642872939, now seen corresponding path program 1 times [2020-09-04 22:08:38,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:38,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482931323] [2020-09-04 22:08:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:38,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:38,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 22:08:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:38,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 22:08:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 22:08:38,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482931323] [2020-09-04 22:08:38,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:38,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 22:08:38,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271129354] [2020-09-04 22:08:38,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 22:08:38,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:38,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 22:08:38,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 22:08:38,881 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 9 states. [2020-09-04 22:08:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:39,237 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2020-09-04 22:08:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 22:08:39,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-09-04 22:08:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:39,240 INFO L225 Difference]: With dead ends: 120 [2020-09-04 22:08:39,240 INFO L226 Difference]: Without dead ends: 99 [2020-09-04 22:08:39,241 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 [2020-09-04 22:08:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-04 22:08:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2020-09-04 22:08:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 22:08:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-09-04 22:08:39,261 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 51 [2020-09-04 22:08:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:39,262 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-09-04 22:08:39,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 22:08:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-09-04 22:08:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 22:08:39,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:39,263 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] [2020-09-04 22:08:39,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 22:08:39,264 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:39,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1372689452, now seen corresponding path program 2 times [2020-09-04 22:08:39,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:39,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556523571] [2020-09-04 22:08:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:39,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:39,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 22:08:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:39,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 22:08:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 22:08:39,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556523571] [2020-09-04 22:08:39,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:39,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 22:08:39,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133787211] [2020-09-04 22:08:39,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 22:08:39,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 22:08:39,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-04 22:08:39,436 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 11 states. [2020-09-04 22:08:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:39,818 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-09-04 22:08:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 22:08:39,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-04 22:08:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:39,820 INFO L225 Difference]: With dead ends: 132 [2020-09-04 22:08:39,820 INFO L226 Difference]: Without dead ends: 111 [2020-09-04 22:08:39,821 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 [2020-09-04 22:08:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-04 22:08:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2020-09-04 22:08:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-04 22:08:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-09-04 22:08:39,840 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 60 [2020-09-04 22:08:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:39,840 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-09-04 22:08:39,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 22:08:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-09-04 22:08:39,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 22:08:39,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:39,842 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] [2020-09-04 22:08:39,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 22:08:39,842 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:39,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1521110738, now seen corresponding path program 1 times [2020-09-04 22:08:39,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:39,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891112668] [2020-09-04 22:08:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:39,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:39,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 22:08:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:39,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 22:08:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 22:08:39,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891112668] [2020-09-04 22:08:39,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:40,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 22:08:40,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870849402] [2020-09-04 22:08:40,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 22:08:40,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:40,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 22:08:40,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-04 22:08:40,002 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 11 states. [2020-09-04 22:08:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:40,480 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2020-09-04 22:08:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 22:08:40,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-09-04 22:08:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:40,482 INFO L225 Difference]: With dead ends: 125 [2020-09-04 22:08:40,482 INFO L226 Difference]: Without dead ends: 101 [2020-09-04 22:08:40,486 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 [2020-09-04 22:08:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-04 22:08:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-09-04 22:08:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-04 22:08:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-09-04 22:08:40,526 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 61 [2020-09-04 22:08:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:40,526 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-09-04 22:08:40,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 22:08:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-09-04 22:08:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-04 22:08:40,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:40,527 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] [2020-09-04 22:08:40,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 22:08:40,528 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:40,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:40,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1187742581, now seen corresponding path program 3 times [2020-09-04 22:08:40,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:40,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867145315] [2020-09-04 22:08:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:40,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:40,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 22:08:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:40,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-04 22:08:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 22:08:40,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867145315] [2020-09-04 22:08:40,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:40,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 22:08:40,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098984428] [2020-09-04 22:08:40,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 22:08:40,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:40,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 22:08:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-04 22:08:40,803 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 17 states. [2020-09-04 22:08:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:41,758 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-09-04 22:08:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 22:08:41,758 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-09-04 22:08:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:41,760 INFO L225 Difference]: With dead ends: 113 [2020-09-04 22:08:41,760 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 22:08:41,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 22:08:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 22:08:41,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-09-04 22:08:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-04 22:08:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-09-04 22:08:41,777 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 69 [2020-09-04 22:08:41,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:41,778 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-09-04 22:08:41,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 22:08:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-09-04 22:08:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-04 22:08:41,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:41,779 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] [2020-09-04 22:08:41,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 22:08:41,780 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash 979580858, now seen corresponding path program 4 times [2020-09-04 22:08:41,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:41,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073246014] [2020-09-04 22:08:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:41,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:41,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 22:08:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:41,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-04 22:08:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-04 22:08:42,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073246014] [2020-09-04 22:08:42,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:42,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 22:08:42,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089848601] [2020-09-04 22:08:42,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 22:08:42,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:42,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 22:08:42,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:08:42,017 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 12 states. [2020-09-04 22:08:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:42,647 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2020-09-04 22:08:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 22:08:42,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-04 22:08:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:42,650 INFO L225 Difference]: With dead ends: 125 [2020-09-04 22:08:42,650 INFO L226 Difference]: Without dead ends: 120 [2020-09-04 22:08:42,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-09-04 22:08:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-04 22:08:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2020-09-04 22:08:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-04 22:08:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-04 22:08:42,675 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 76 [2020-09-04 22:08:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:42,675 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-04 22:08:42,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 22:08:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-04 22:08:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-04 22:08:42,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:42,677 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] [2020-09-04 22:08:42,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 22:08:42,677 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:42,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:42,678 INFO L82 PathProgramCache]: Analyzing trace with hash -446623556, now seen corresponding path program 2 times [2020-09-04 22:08:42,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:42,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999184646] [2020-09-04 22:08:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:42,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:42,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 22:08:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:42,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-04 22:08:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 22:08:42,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999184646] [2020-09-04 22:08:42,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:42,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 22:08:42,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500140784] [2020-09-04 22:08:42,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 22:08:42,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:42,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 22:08:42,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-04 22:08:42,892 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 13 states. [2020-09-04 22:08:43,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:43,372 INFO L93 Difference]: Finished difference Result 163 states and 171 transitions. [2020-09-04 22:08:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 22:08:43,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-09-04 22:08:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:43,374 INFO L225 Difference]: With dead ends: 163 [2020-09-04 22:08:43,374 INFO L226 Difference]: Without dead ends: 122 [2020-09-04 22:08:43,375 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 [2020-09-04 22:08:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-04 22:08:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2020-09-04 22:08:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-04 22:08:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-09-04 22:08:43,394 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 77 [2020-09-04 22:08:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:43,394 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-09-04 22:08:43,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 22:08:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-09-04 22:08:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-04 22:08:43,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:43,396 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] [2020-09-04 22:08:43,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 22:08:43,396 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1305863211, now seen corresponding path program 5 times [2020-09-04 22:08:43,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:43,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638450755] [2020-09-04 22:08:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:08:43,429 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:08:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:08:43,456 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:08:43,511 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 22:08:43,511 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 22:08:43,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 22:08:43,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 10:08:43 BoogieIcfgContainer [2020-09-04 22:08:43,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 22:08:43,591 INFO L168 Benchmark]: Toolchain (without parser) took 10337.18 ms. Allocated memory was 146.8 MB in the beginning and 336.1 MB in the end (delta: 189.3 MB). Free memory was 102.6 MB in the beginning and 201.1 MB in the end (delta: -98.5 MB). Peak memory consumption was 90.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:43,592 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 146.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 22:08:43,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 638.06 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 102.2 MB in the beginning and 171.5 MB in the end (delta: -69.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:43,594 INFO L168 Benchmark]: Boogie Preprocessor took 69.42 ms. Allocated memory is still 204.5 MB. Free memory was 171.5 MB in the beginning and 168.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:43,594 INFO L168 Benchmark]: RCFGBuilder took 645.04 ms. Allocated memory is still 204.5 MB. Free memory was 168.5 MB in the beginning and 122.8 MB in the end (delta: 45.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:43,595 INFO L168 Benchmark]: TraceAbstraction took 8979.09 ms. Allocated memory was 204.5 MB in the beginning and 336.1 MB in the end (delta: 131.6 MB). Free memory was 122.1 MB in the beginning and 201.1 MB in the end (delta: -79.0 MB). Peak memory consumption was 52.6 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:43,599 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 146.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 638.06 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 102.2 MB in the beginning and 171.5 MB in the end (delta: -69.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.42 ms. Allocated memory is still 204.5 MB. Free memory was 171.5 MB in the beginning and 168.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 645.04 ms. Allocated memory is still 204.5 MB. Free memory was 168.5 MB in the beginning and 122.8 MB in the end (delta: 45.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8979.09 ms. Allocated memory was 204.5 MB in the beginning and 336.1 MB in the end (delta: 131.6 MB). Free memory was 122.1 MB in the beginning and 201.1 MB in the end (delta: -79.0 MB). Peak memory consumption was 52.6 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={-3:0}, head={-2:0}, 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={-1:0}, head={-3:0}, len=3] [L580] EXPR head->next VAL [head={-3:0}, head={-1:0}, head->next={0:0}, len=3] [L580] head = head->next VAL [head={-3:0}, head={0:0}, head->next={0:0}, len=3] [L578] COND FALSE !(\read(head)) VAL [head={0:0}, head={-3:0}, 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: 8.8s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 704 SDtfs, 1522 SDslu, 1614 SDs, 0 SdLazy, 3556 SolverSat, 235 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.7s 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: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 220 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 706 NumberOfCodeBlocks, 706 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 611 ConstructedInterpolants, 0 QuantifiedInterpolants, 101481 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...