/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:59:21,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:59:21,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:59:21,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:59:21,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:59:21,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:59:21,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:59:21,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:59:21,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:59:21,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:59:21,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:59:21,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:59:21,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:59:21,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:59:21,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:59:21,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:59:21,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:59:21,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:59:21,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:59:21,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:59:21,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:59:21,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:59:21,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:59:21,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:59:21,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:59:21,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:59:21,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:59:21,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:59:21,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:59:21,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:59:21,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:59:21,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:59:21,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:59:21,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:59:21,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:59:21,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:59:21,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:59:21,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:59:21,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:59:21,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:59:21,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:59:21,326 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:59:21,381 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:59:21,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:59:21,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:59:21,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:59:21,384 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:59:21,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:59:21,385 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:59:21,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:59:21,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:59:21,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:59:21,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:59:21,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:59:21,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:59:21,387 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:59:21,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:59:21,388 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:59:21,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:59:21,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:59:21,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:59:21,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:59:21,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:59:21,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:59:21,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:59:21,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:59:21,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:59:21,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:59:21,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:59:21,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:59:21,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:59:21,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:59:21,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:59:21,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:59:21,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:59:21,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:59:21,926 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:59:21,928 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-09-24 14:59:22,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f39e02c41/7fd0ec6ce6ba42dca1d074a33374ca68/FLAGfd2813bb1 [2020-09-24 14:59:22,644 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:59:22,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-09-24 14:59:22,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f39e02c41/7fd0ec6ce6ba42dca1d074a33374ca68/FLAGfd2813bb1 [2020-09-24 14:59:22,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f39e02c41/7fd0ec6ce6ba42dca1d074a33374ca68 [2020-09-24 14:59:22,947 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:59:22,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:59:22,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:22,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:59:22,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:59:22,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:22" (1/1) ... [2020-09-24 14:59:22,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d5d851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:22, skipping insertion in model container [2020-09-24 14:59:22,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:22" (1/1) ... [2020-09-24 14:59:22,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:59:23,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:59:23,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:23,518 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:59:23,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:23,651 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:59:23,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23 WrapperNode [2020-09-24 14:59:23,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:23,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:59:23,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:59:23,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:59:23,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23" (1/1) ... [2020-09-24 14:59:23,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23" (1/1) ... [2020-09-24 14:59:23,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23" (1/1) ... [2020-09-24 14:59:23,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23" (1/1) ... [2020-09-24 14:59:23,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23" (1/1) ... [2020-09-24 14:59:23,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23" (1/1) ... [2020-09-24 14:59:23,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23" (1/1) ... [2020-09-24 14:59:23,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:59:23,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:59:23,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:59:23,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:59:23,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23" (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 [2020-09-24 14:59:23,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:59:23,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:59:23,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:59:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 14:59:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 14:59:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 14:59:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 14:59:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 14:59:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 14:59:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 14:59:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 14:59:23,878 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 14:59:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 14:59:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 14:59:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 14:59:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 14:59:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 14:59:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 14:59:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 14:59:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 14:59:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 14:59:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 14:59:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 14:59:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 14:59:23,887 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 14:59:23,887 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 14:59:23,888 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 14:59:23,888 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 14:59:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 14:59:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 14:59:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 14:59:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 14:59:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 14:59:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 14:59:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 14:59:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 14:59:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 14:59:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 14:59:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 14:59:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 14:59:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 14:59:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 14:59:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 14:59:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 14:59:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 14:59:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 14:59:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 14:59:23,894 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 14:59:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 14:59:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 14:59:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 14:59:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 14:59:23,895 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 14:59:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 14:59:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 14:59:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 14:59:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 14:59:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 14:59:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 14:59:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 14:59:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 14:59:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 14:59:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 14:59:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 14:59:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 14:59:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 14:59:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 14:59:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 14:59:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 14:59:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 14:59:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 14:59:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 14:59:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 14:59:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 14:59:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 14:59:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 14:59:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 14:59:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 14:59:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 14:59:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 14:59:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 14:59:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 14:59:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 14:59:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 14:59:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 14:59:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 14:59:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 14:59:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 14:59:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 14:59:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 14:59:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 14:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 14:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 14:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 14:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 14:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 14:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 14:59:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 14:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 14:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 14:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 14:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 14:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 14:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 14:59:23,907 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 14:59:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 14:59:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:59:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:59:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:59:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 14:59:23,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:59:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 14:59:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 14:59:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:59:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:59:23,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:59:23,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:59:24,611 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:59:24,612 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-24 14:59:24,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:24 BoogieIcfgContainer [2020-09-24 14:59:24,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:59:24,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:59:24,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:59:24,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:59:24,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:59:22" (1/3) ... [2020-09-24 14:59:24,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5241f7f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:24, skipping insertion in model container [2020-09-24 14:59:24,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:23" (2/3) ... [2020-09-24 14:59:24,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5241f7f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:24, skipping insertion in model container [2020-09-24 14:59:24,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:24" (3/3) ... [2020-09-24 14:59:24,628 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-09-24 14:59:24,640 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:59:24,651 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-09-24 14:59:24,674 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-09-24 14:59:24,703 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:59:24,703 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:59:24,703 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:59:24,704 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:59:24,704 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:59:24,704 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:59:24,704 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:59:24,704 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:59:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-09-24 14:59:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 14:59:24,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:24,744 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] [2020-09-24 14:59:24,744 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:24,753 INFO L82 PathProgramCache]: Analyzing trace with hash -159181327, now seen corresponding path program 1 times [2020-09-24 14:59:24,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:24,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931234199] [2020-09-24 14:59:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:25,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:25,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931234199] [2020-09-24 14:59:25,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:25,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:59:25,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500884102] [2020-09-24 14:59:25,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:59:25,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:25,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:59:25,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:59:25,067 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 3 states. [2020-09-24 14:59:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:25,391 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-09-24 14:59:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:59:25,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-24 14:59:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:25,413 INFO L225 Difference]: With dead ends: 157 [2020-09-24 14:59:25,413 INFO L226 Difference]: Without dead ends: 74 [2020-09-24 14:59:25,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:59:25,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-24 14:59:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-09-24 14:59:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 14:59:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-09-24 14:59:25,471 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 21 [2020-09-24 14:59:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:25,472 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-09-24 14:59:25,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:59:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-09-24 14:59:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 14:59:25,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:25,473 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] [2020-09-24 14:59:25,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:59:25,474 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:25,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1476818129, now seen corresponding path program 1 times [2020-09-24 14:59:25,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:25,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824910032] [2020-09-24 14:59:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:25,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:25,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824910032] [2020-09-24 14:59:25,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:25,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 14:59:25,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187119875] [2020-09-24 14:59:25,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:59:25,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:25,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:59:25,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:59:25,766 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 8 states. [2020-09-24 14:59:26,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:26,105 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-09-24 14:59:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:59:26,106 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-09-24 14:59:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:26,108 INFO L225 Difference]: With dead ends: 92 [2020-09-24 14:59:26,108 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 14:59:26,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:59:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 14:59:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2020-09-24 14:59:26,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 14:59:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-09-24 14:59:26,141 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 23 [2020-09-24 14:59:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:26,142 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-09-24 14:59:26,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:59:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-09-24 14:59:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 14:59:26,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:26,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:26,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:59:26,144 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:26,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1518762392, now seen corresponding path program 1 times [2020-09-24 14:59:26,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:26,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707931255] [2020-09-24 14:59:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:26,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:26,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707931255] [2020-09-24 14:59:26,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:26,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 14:59:26,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066067660] [2020-09-24 14:59:26,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:59:26,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:26,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:59:26,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:59:26,465 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 9 states. [2020-09-24 14:59:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:26,849 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-09-24 14:59:26,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 14:59:26,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-24 14:59:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:26,851 INFO L225 Difference]: With dead ends: 120 [2020-09-24 14:59:26,852 INFO L226 Difference]: Without dead ends: 117 [2020-09-24 14:59:26,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:59:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-24 14:59:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 81. [2020-09-24 14:59:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 14:59:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-09-24 14:59:26,865 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 27 [2020-09-24 14:59:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:26,866 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-09-24 14:59:26,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:59:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-09-24 14:59:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 14:59:26,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:26,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:26,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:59:26,868 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2047332937, now seen corresponding path program 1 times [2020-09-24 14:59:26,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:26,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217220787] [2020-09-24 14:59:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:27,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:27,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217220787] [2020-09-24 14:59:27,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:27,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 14:59:27,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126312565] [2020-09-24 14:59:27,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:59:27,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:27,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:59:27,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:59:27,059 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 6 states. [2020-09-24 14:59:27,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:27,282 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-09-24 14:59:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:59:27,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-09-24 14:59:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:27,284 INFO L225 Difference]: With dead ends: 114 [2020-09-24 14:59:27,284 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 14:59:27,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:59:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 14:59:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-24 14:59:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 14:59:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-09-24 14:59:27,305 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 36 [2020-09-24 14:59:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:27,306 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-09-24 14:59:27,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:59:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-09-24 14:59:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 14:59:27,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:27,308 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:27,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:59:27,308 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1237644091, now seen corresponding path program 1 times [2020-09-24 14:59:27,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:27,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894437493] [2020-09-24 14:59:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:27,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:27,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894437493] [2020-09-24 14:59:27,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:27,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 14:59:27,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468499975] [2020-09-24 14:59:27,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 14:59:27,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:27,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 14:59:27,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:59:27,850 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 16 states. [2020-09-24 14:59:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:28,897 INFO L93 Difference]: Finished difference Result 155 states and 162 transitions. [2020-09-24 14:59:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:59:28,898 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-09-24 14:59:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:28,900 INFO L225 Difference]: With dead ends: 155 [2020-09-24 14:59:28,903 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 14:59:28,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-24 14:59:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 14:59:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 97. [2020-09-24 14:59:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-24 14:59:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2020-09-24 14:59:28,927 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 40 [2020-09-24 14:59:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:28,928 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2020-09-24 14:59:28,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 14:59:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2020-09-24 14:59:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 14:59:28,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:28,931 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 14:59:28,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:59:28,932 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:28,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:28,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1411163060, now seen corresponding path program 1 times [2020-09-24 14:59:28,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:28,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304493435] [2020-09-24 14:59:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:29,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:29,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304493435] [2020-09-24 14:59:29,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:29,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:59:29,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399853012] [2020-09-24 14:59:29,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:59:29,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:59:29,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:59:29,070 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand 7 states. [2020-09-24 14:59:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:29,354 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2020-09-24 14:59:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:59:29,355 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-09-24 14:59:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:29,356 INFO L225 Difference]: With dead ends: 136 [2020-09-24 14:59:29,356 INFO L226 Difference]: Without dead ends: 97 [2020-09-24 14:59:29,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:59:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-24 14:59:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-09-24 14:59:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-24 14:59:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-09-24 14:59:29,367 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 43 [2020-09-24 14:59:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:29,367 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-09-24 14:59:29,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:59:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-09-24 14:59:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 14:59:29,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:29,369 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, 1, 1, 1, 1] [2020-09-24 14:59:29,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:59:29,370 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:29,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:29,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1215747511, now seen corresponding path program 1 times [2020-09-24 14:59:29,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:29,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336321859] [2020-09-24 14:59:29,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:30,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:30,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336321859] [2020-09-24 14:59:30,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:30,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 14:59:30,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210008975] [2020-09-24 14:59:30,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 14:59:30,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 14:59:30,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:59:30,029 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 20 states. [2020-09-24 14:59:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:31,382 INFO L93 Difference]: Finished difference Result 163 states and 170 transitions. [2020-09-24 14:59:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:59:31,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-09-24 14:59:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:31,384 INFO L225 Difference]: With dead ends: 163 [2020-09-24 14:59:31,384 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 14:59:31,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 14:59:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 14:59:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 106. [2020-09-24 14:59:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-24 14:59:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-09-24 14:59:31,412 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 47 [2020-09-24 14:59:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:31,412 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-09-24 14:59:31,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 14:59:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-09-24 14:59:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 14:59:31,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:31,414 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 14:59:31,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:59:31,415 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:31,415 INFO L82 PathProgramCache]: Analyzing trace with hash 231328440, now seen corresponding path program 2 times [2020-09-24 14:59:31,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:31,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554908541] [2020-09-24 14:59:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:32,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:32,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554908541] [2020-09-24 14:59:32,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:32,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 14:59:32,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136418098] [2020-09-24 14:59:32,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 14:59:32,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:32,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 14:59:32,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:59:32,171 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 20 states. [2020-09-24 14:59:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:33,319 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-09-24 14:59:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 14:59:33,319 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-09-24 14:59:33,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:33,321 INFO L225 Difference]: With dead ends: 179 [2020-09-24 14:59:33,322 INFO L226 Difference]: Without dead ends: 176 [2020-09-24 14:59:33,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 14:59:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-24 14:59:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 117. [2020-09-24 14:59:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-24 14:59:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2020-09-24 14:59:33,331 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 53 [2020-09-24 14:59:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:33,331 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2020-09-24 14:59:33,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 14:59:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2020-09-24 14:59:33,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 14:59:33,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:33,333 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 14:59:33,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:59:33,334 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:33,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2144912159, now seen corresponding path program 1 times [2020-09-24 14:59:33,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:33,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163462410] [2020-09-24 14:59:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:33,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:33,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163462410] [2020-09-24 14:59:33,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:33,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:59:33,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254822571] [2020-09-24 14:59:33,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:59:33,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:59:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:59:33,854 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 22 states. [2020-09-24 14:59:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:35,792 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2020-09-24 14:59:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 14:59:35,793 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-09-24 14:59:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:35,794 INFO L225 Difference]: With dead ends: 197 [2020-09-24 14:59:35,794 INFO L226 Difference]: Without dead ends: 175 [2020-09-24 14:59:35,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 14:59:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-24 14:59:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2020-09-24 14:59:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-24 14:59:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-09-24 14:59:35,804 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 56 [2020-09-24 14:59:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:35,806 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-09-24 14:59:35,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:59:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-09-24 14:59:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 14:59:35,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:35,816 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 14:59:35,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:59:35,817 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:35,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1025074422, now seen corresponding path program 1 times [2020-09-24 14:59:35,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:35,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603057324] [2020-09-24 14:59:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:36,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-24 14:59:36,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603057324] [2020-09-24 14:59:36,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:36,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:59:36,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706679705] [2020-09-24 14:59:36,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:59:36,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:36,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:59:36,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:59:36,630 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand 22 states. [2020-09-24 14:59:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:38,141 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-09-24 14:59:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 14:59:38,142 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-09-24 14:59:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:38,143 INFO L225 Difference]: With dead ends: 148 [2020-09-24 14:59:38,143 INFO L226 Difference]: Without dead ends: 145 [2020-09-24 14:59:38,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 14:59:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-24 14:59:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 103. [2020-09-24 14:59:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 14:59:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-09-24 14:59:38,159 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 60 [2020-09-24 14:59:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:38,159 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-09-24 14:59:38,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:59:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-09-24 14:59:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 14:59:38,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:38,162 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2020-09-24 14:59:38,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:59:38,162 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash -412836324, now seen corresponding path program 2 times [2020-09-24 14:59:38,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:38,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120711533] [2020-09-24 14:59:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:38,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:38,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120711533] [2020-09-24 14:59:38,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:38,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:59:38,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231283742] [2020-09-24 14:59:38,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:59:38,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:38,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:59:38,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:59:38,498 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 17 states. [2020-09-24 14:59:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:39,652 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2020-09-24 14:59:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:59:39,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-09-24 14:59:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:39,654 INFO L225 Difference]: With dead ends: 147 [2020-09-24 14:59:39,655 INFO L226 Difference]: Without dead ends: 101 [2020-09-24 14:59:39,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 14:59:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-24 14:59:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-09-24 14:59:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-24 14:59:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-09-24 14:59:39,661 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 63 [2020-09-24 14:59:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:39,662 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-09-24 14:59:39,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:59:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-09-24 14:59:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 14:59:39,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:39,663 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-09-24 14:59:39,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:59:39,663 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash -80620955, now seen corresponding path program 1 times [2020-09-24 14:59:39,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:39,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357897410] [2020-09-24 14:59:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:40,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357897410] [2020-09-24 14:59:40,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:59:40,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 14:59:40,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133604231] [2020-09-24 14:59:40,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 14:59:40,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:40,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 14:59:40,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:59:40,911 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 25 states. [2020-09-24 14:59:41,623 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-09-24 14:59:41,908 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-09-24 14:59:42,084 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-09-24 14:59:42,415 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-09-24 14:59:42,781 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-09-24 14:59:43,030 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-09-24 14:59:43,365 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2020-09-24 14:59:43,579 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-09-24 14:59:43,785 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-09-24 14:59:44,002 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-09-24 14:59:44,531 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-09-24 14:59:45,165 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-09-24 14:59:45,322 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-09-24 14:59:45,688 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-09-24 14:59:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:46,091 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2020-09-24 14:59:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 14:59:46,092 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-09-24 14:59:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:46,094 INFO L225 Difference]: With dead ends: 172 [2020-09-24 14:59:46,094 INFO L226 Difference]: Without dead ends: 170 [2020-09-24 14:59:46,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=480, Invalid=2490, Unknown=0, NotChecked=0, Total=2970 [2020-09-24 14:59:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-24 14:59:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 122. [2020-09-24 14:59:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-24 14:59:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2020-09-24 14:59:46,103 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 63 [2020-09-24 14:59:46,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:46,103 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2020-09-24 14:59:46,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 14:59:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2020-09-24 14:59:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 14:59:46,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:46,104 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:46,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 14:59:46,105 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:46,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:46,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1761981780, now seen corresponding path program 1 times [2020-09-24 14:59:46,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:46,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526529948] [2020-09-24 14:59:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:59:46,145 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:59:46,145 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:59:46,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 14:59:46,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:59:46 BoogieIcfgContainer [2020-09-24 14:59:46,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:59:46,176 INFO L168 Benchmark]: Toolchain (without parser) took 23227.50 ms. Allocated memory was 138.4 MB in the beginning and 434.1 MB in the end (delta: 295.7 MB). Free memory was 100.1 MB in the beginning and 327.2 MB in the end (delta: -227.2 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:46,177 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 14:59:46,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 700.20 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 99.4 MB in the beginning and 168.9 MB in the end (delta: -69.5 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:46,178 INFO L168 Benchmark]: Boogie Preprocessor took 137.49 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 165.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:46,179 INFO L168 Benchmark]: RCFGBuilder took 825.65 ms. Allocated memory is still 202.4 MB. Free memory was 165.8 MB in the beginning and 113.6 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:46,180 INFO L168 Benchmark]: TraceAbstraction took 21555.06 ms. Allocated memory was 202.4 MB in the beginning and 434.1 MB in the end (delta: 231.7 MB). Free memory was 112.9 MB in the beginning and 327.2 MB in the end (delta: -214.3 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:46,183 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 700.20 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 99.4 MB in the beginning and 168.9 MB in the end (delta: -69.5 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.49 ms. Allocated memory is still 202.4 MB. Free memory was 168.9 MB in the beginning and 165.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 825.65 ms. Allocated memory is still 202.4 MB. Free memory was 165.8 MB in the beginning and 113.6 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21555.06 ms. Allocated memory was 202.4 MB in the beginning and 434.1 MB in the end (delta: 231.7 MB). Free memory was 112.9 MB in the beginning and 327.2 MB in the end (delta: -214.3 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1039]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* null = malloc(sizeof(SLL)); [L995] null->colour = BLACK [L996] null->next = ((void*)0) [L998] SLL* list = malloc(sizeof(SLL)); [L999] list->next = null [L1000] list->colour = BLACK [L1002] SLL* end = list; [L1005] COND TRUE __VERIFIER_nondet_int() [L1008] end->next = malloc(sizeof(SLL)) [L1009] EXPR end->next [L1009] end = end->next [L1010] end->next = null [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1018] end->colour = RED [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1022] end->colour = BLACK [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND FALSE !(!(BLACK == end->colour)) [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND FALSE !(RED == end->colour) [L1042] EXPR end->next [L1042] end = end->next [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND TRUE RED == end->colour [L1037] EXPR end->next [L1037] end = end->next [L1038] COND FALSE !(!(null != end)) [L1039] EXPR end->colour [L1039] COND TRUE !(BLACK != end->colour) [L1039] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 98 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21.4s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 14.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 724 SDtfs, 4180 SDslu, 4272 SDs, 0 SdLazy, 4677 SolverSat, 763 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 363 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 12.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 372 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 599 NumberOfCodeBlocks, 599 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 520 ConstructedInterpolants, 0 QuantifiedInterpolants, 378343 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 11/64 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...