/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:21:51,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:21:51,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:21:51,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:21:51,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:21:51,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:21:51,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:21:51,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:21:51,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:21:51,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:21:51,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:21:51,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:21:51,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:21:51,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:21:51,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:21:51,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:21:51,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:21:51,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:21:51,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:21:51,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:21:51,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:21:51,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:21:51,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:21:51,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:21:51,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:21:51,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:21:51,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:21:51,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:21:51,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:21:51,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:21:51,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:21:51,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:21:51,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:21:51,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:21:51,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:21:51,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:21:51,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:21:51,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:21:51,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:21:51,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:21:51,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:21:51,933 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 [2020-09-21 10:21:51,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:21:51,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:21:51,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:21:51,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:21:51,961 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:21:51,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:21:51,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:21:51,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:21:51,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:21:51,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:21:51,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:21:51,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:21:51,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:21:51,963 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:21:51,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:21:51,963 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:21:51,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:21:51,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:21:51,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:21:51,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:21:51,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:21:51,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:21:51,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:21:51,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:21:51,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:21:51,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:21:51,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:21:51,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:21:51,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:21:51,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:21:52,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:21:52,439 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:21:52,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:21:52,445 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:21:52,445 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:21:52,447 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-09-21 10:21:52,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/376baa39a/60c80253d6844f47919ccdd090cb05b4/FLAG676b9868c [2020-09-21 10:21:53,131 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:21:53,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-09-21 10:21:53,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/376baa39a/60c80253d6844f47919ccdd090cb05b4/FLAG676b9868c [2020-09-21 10:21:53,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/376baa39a/60c80253d6844f47919ccdd090cb05b4 [2020-09-21 10:21:53,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:21:53,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:21:53,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:53,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:21:53,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:21:53,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:53" (1/1) ... [2020-09-21 10:21:53,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e3ee29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:53, skipping insertion in model container [2020-09-21 10:21:53,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:53" (1/1) ... [2020-09-21 10:21:53,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:21:53,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:21:53,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:53,995 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:21:54,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:54,133 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:21:54,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54 WrapperNode [2020-09-21 10:21:54,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:54,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:21:54,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:21:54,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:21:54,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54" (1/1) ... [2020-09-21 10:21:54,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54" (1/1) ... [2020-09-21 10:21:54,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54" (1/1) ... [2020-09-21 10:21:54,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54" (1/1) ... [2020-09-21 10:21:54,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54" (1/1) ... [2020-09-21 10:21:54,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54" (1/1) ... [2020-09-21 10:21:54,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54" (1/1) ... [2020-09-21 10:21:54,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:21:54,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:21:54,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:21:54,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:21:54,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54" (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 [2020-09-21 10:21:54,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:21:54,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:21:54,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:21:54,303 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 10:21:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 10:21:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 10:21:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 10:21:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 10:21:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 10:21:54,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 10:21:54,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 10:21:54,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 10:21:54,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 10:21:54,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 10:21:54,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 10:21:54,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 10:21:54,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 10:21:54,306 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 10:21:54,306 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 10:21:54,307 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 10:21:54,307 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 10:21:54,307 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 10:21:54,307 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 10:21:54,307 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 10:21:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 10:21:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 10:21:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 10:21:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 10:21:54,308 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 10:21:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 10:21:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 10:21:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 10:21:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 10:21:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 10:21:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 10:21:54,309 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 10:21:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 10:21:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 10:21:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 10:21:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 10:21:54,310 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 10:21:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 10:21:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 10:21:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 10:21:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 10:21:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 10:21:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 10:21:54,311 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 10:21:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 10:21:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 10:21:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 10:21:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 10:21:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 10:21:54,312 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:21:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 10:21:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 10:21:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:21:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 10:21:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 10:21:54,313 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 10:21:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 10:21:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 10:21:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:21:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 10:21:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 10:21:54,314 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 10:21:54,315 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:21:54,315 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 10:21:54,315 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 10:21:54,315 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 10:21:54,315 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 10:21:54,315 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 10:21:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 10:21:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 10:21:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 10:21:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 10:21:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 10:21:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 10:21:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 10:21:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 10:21:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 10:21:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 10:21:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 10:21:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 10:21:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 10:21:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 10:21:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 10:21:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 10:21:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 10:21:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 10:21:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 10:21:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 10:21:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 10:21:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 10:21:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 10:21:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 10:21:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 10:21:54,319 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 10:21:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 10:21:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 10:21:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 10:21:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 10:21:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 10:21:54,320 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 10:21:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 10:21:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 10:21:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:21:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:21:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:21:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:21:54,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:21:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:21:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:21:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:21:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:21:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:21:54,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:21:54,922 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:21:54,922 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-09-21 10:21:54,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:54 BoogieIcfgContainer [2020-09-21 10:21:54,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:21:54,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:21:54,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:21:54,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:21:54,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:21:53" (1/3) ... [2020-09-21 10:21:54,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59afe3a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:54, skipping insertion in model container [2020-09-21 10:21:54,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:54" (2/3) ... [2020-09-21 10:21:54,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59afe3a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:54, skipping insertion in model container [2020-09-21 10:21:54,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:54" (3/3) ... [2020-09-21 10:21:54,940 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-09-21 10:21:54,951 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:21:54,961 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-09-21 10:21:54,984 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-09-21 10:21:55,021 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:21:55,025 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:21:55,025 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:21:55,025 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:21:55,025 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:21:55,025 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:21:55,026 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:21:55,026 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:21:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-09-21 10:21:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 10:21:55,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:55,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:55,084 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1255802584, now seen corresponding path program 1 times [2020-09-21 10:21:55,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:55,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391044354] [2020-09-21 10:21:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:55,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:55,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391044354] [2020-09-21 10:21:55,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:55,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:21:55,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041613659] [2020-09-21 10:21:55,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:21:55,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:55,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:21:55,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:21:55,373 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-09-21 10:21:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:55,566 INFO L93 Difference]: Finished difference Result 98 states and 156 transitions. [2020-09-21 10:21:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:21:55,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-21 10:21:55,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:55,604 INFO L225 Difference]: With dead ends: 98 [2020-09-21 10:21:55,605 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 10:21:55,609 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 [2020-09-21 10:21:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 10:21:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-21 10:21:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:21:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-09-21 10:21:55,659 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 10 [2020-09-21 10:21:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:55,660 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-09-21 10:21:55,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:21:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-09-21 10:21:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 10:21:55,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:55,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:55,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:21:55,662 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash -338068956, now seen corresponding path program 1 times [2020-09-21 10:21:55,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:55,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785277362] [2020-09-21 10:21:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:55,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:55,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785277362] [2020-09-21 10:21:55,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:55,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:55,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190823288] [2020-09-21 10:21:55,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:55,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:55,847 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 5 states. [2020-09-21 10:21:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:56,025 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-09-21 10:21:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:56,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-09-21 10:21:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:56,027 INFO L225 Difference]: With dead ends: 51 [2020-09-21 10:21:56,028 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:21:56,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:21:56,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-09-21 10:21:56,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 10:21:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-09-21 10:21:56,037 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 11 [2020-09-21 10:21:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:56,037 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-09-21 10:21:56,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-09-21 10:21:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 10:21:56,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:56,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:56,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:21:56,039 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1890143313, now seen corresponding path program 1 times [2020-09-21 10:21:56,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:56,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562455169] [2020-09-21 10:21:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:56,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:56,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562455169] [2020-09-21 10:21:56,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:56,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:56,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700778390] [2020-09-21 10:21:56,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:56,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:56,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:56,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:56,171 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 5 states. [2020-09-21 10:21:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:56,325 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-09-21 10:21:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:56,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-21 10:21:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:56,327 INFO L225 Difference]: With dead ends: 43 [2020-09-21 10:21:56,327 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 10:21:56,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 10:21:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-09-21 10:21:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 10:21:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-09-21 10:21:56,334 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 12 [2020-09-21 10:21:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:56,335 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-09-21 10:21:56,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-09-21 10:21:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:21:56,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:56,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:56,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:21:56,337 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash 290038970, now seen corresponding path program 1 times [2020-09-21 10:21:56,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:56,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111300228] [2020-09-21 10:21:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:56,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:56,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111300228] [2020-09-21 10:21:56,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:56,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:21:56,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686857165] [2020-09-21 10:21:56,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:21:56,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:56,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:21:56,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:56,486 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2020-09-21 10:21:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:56,726 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-09-21 10:21:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:21:56,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-21 10:21:56,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:56,727 INFO L225 Difference]: With dead ends: 66 [2020-09-21 10:21:56,728 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 10:21:56,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:21:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 10:21:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-09-21 10:21:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 10:21:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-09-21 10:21:56,737 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 14 [2020-09-21 10:21:56,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:56,737 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-09-21 10:21:56,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:21:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-09-21 10:21:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 10:21:56,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:56,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:56,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:21:56,739 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2060721718, now seen corresponding path program 1 times [2020-09-21 10:21:56,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:56,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162483619] [2020-09-21 10:21:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:56,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:56,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162483619] [2020-09-21 10:21:56,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:56,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:56,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849728664] [2020-09-21 10:21:56,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:56,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:56,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:56,834 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 5 states. [2020-09-21 10:21:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:57,039 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-09-21 10:21:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:57,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-21 10:21:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:57,041 INFO L225 Difference]: With dead ends: 48 [2020-09-21 10:21:57,041 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:21:57,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:21:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-09-21 10:21:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 10:21:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-09-21 10:21:57,049 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 15 [2020-09-21 10:21:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:57,049 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-09-21 10:21:57,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-09-21 10:21:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 10:21:57,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:57,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:57,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:21:57,051 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash 373775322, now seen corresponding path program 1 times [2020-09-21 10:21:57,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:57,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751345191] [2020-09-21 10:21:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:57,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:57,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751345191] [2020-09-21 10:21:57,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:57,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:57,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505954235] [2020-09-21 10:21:57,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:57,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:57,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:57,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:57,165 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-09-21 10:21:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:57,319 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-09-21 10:21:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:57,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-21 10:21:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:57,320 INFO L225 Difference]: With dead ends: 46 [2020-09-21 10:21:57,320 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 10:21:57,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 10:21:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-21 10:21:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 10:21:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-09-21 10:21:57,331 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-09-21 10:21:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:57,331 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-09-21 10:21:57,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:57,331 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-09-21 10:21:57,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:21:57,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:57,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:57,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:21:57,333 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:57,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1568846049, now seen corresponding path program 1 times [2020-09-21 10:21:57,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:57,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664899114] [2020-09-21 10:21:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:57,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:57,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664899114] [2020-09-21 10:21:57,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:57,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:21:57,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134781566] [2020-09-21 10:21:57,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:21:57,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:21:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:57,509 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2020-09-21 10:21:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:57,747 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-09-21 10:21:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:21:57,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-21 10:21:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:57,748 INFO L225 Difference]: With dead ends: 59 [2020-09-21 10:21:57,749 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 10:21:57,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:21:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 10:21:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-09-21 10:21:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 10:21:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-09-21 10:21:57,758 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 18 [2020-09-21 10:21:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:57,759 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-09-21 10:21:57,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:21:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-09-21 10:21:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:21:57,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:57,760 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] [2020-09-21 10:21:57,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:21:57,760 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:57,761 INFO L82 PathProgramCache]: Analyzing trace with hash 777661568, now seen corresponding path program 1 times [2020-09-21 10:21:57,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:57,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690654751] [2020-09-21 10:21:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:57,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:57,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690654751] [2020-09-21 10:21:57,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:57,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:21:57,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756708978] [2020-09-21 10:21:57,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:21:57,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:57,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:21:57,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:21:57,851 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-09-21 10:21:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:58,115 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-09-21 10:21:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:21:58,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-21 10:21:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:58,117 INFO L225 Difference]: With dead ends: 63 [2020-09-21 10:21:58,117 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 10:21:58,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:21:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 10:21:58,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-09-21 10:21:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 10:21:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-09-21 10:21:58,123 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 21 [2020-09-21 10:21:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:58,123 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-09-21 10:21:58,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:21:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-09-21 10:21:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:21:58,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:58,124 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] [2020-09-21 10:21:58,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:21:58,125 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1056872398, now seen corresponding path program 1 times [2020-09-21 10:21:58,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:58,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285358308] [2020-09-21 10:21:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:58,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:58,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285358308] [2020-09-21 10:21:58,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:58,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:21:58,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515641052] [2020-09-21 10:21:58,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:21:58,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:58,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:21:58,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:21:58,342 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 8 states. [2020-09-21 10:21:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:58,620 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-21 10:21:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:21:58,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-21 10:21:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:58,621 INFO L225 Difference]: With dead ends: 42 [2020-09-21 10:21:58,621 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 10:21:58,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:21:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 10:21:58,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-21 10:21:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 10:21:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-09-21 10:21:58,627 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2020-09-21 10:21:58,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:58,627 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-09-21 10:21:58,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:21:58,627 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-09-21 10:21:58,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 10:21:58,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:58,628 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] [2020-09-21 10:21:58,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:21:58,629 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:58,629 INFO L82 PathProgramCache]: Analyzing trace with hash -377613816, now seen corresponding path program 1 times [2020-09-21 10:21:58,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:58,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26224203] [2020-09-21 10:21:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:58,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:58,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26224203] [2020-09-21 10:21:58,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:21:58,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:21:58,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231407659] [2020-09-21 10:21:58,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:21:58,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:58,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:21:58,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:21:58,934 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 10 states. [2020-09-21 10:21:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:59,665 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-09-21 10:21:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:21:59,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-09-21 10:21:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:59,667 INFO L225 Difference]: With dead ends: 120 [2020-09-21 10:21:59,668 INFO L226 Difference]: Without dead ends: 118 [2020-09-21 10:21:59,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:21:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-21 10:21:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 62. [2020-09-21 10:21:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-21 10:21:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-09-21 10:21:59,677 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 32 [2020-09-21 10:21:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:59,678 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-09-21 10:21:59,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:21:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-09-21 10:21:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 10:21:59,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:59,679 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] [2020-09-21 10:21:59,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:21:59,680 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash -243600310, now seen corresponding path program 1 times [2020-09-21 10:21:59,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:59,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613957266] [2020-09-21 10:21:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:00,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:00,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613957266] [2020-09-21 10:22:00,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:00,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:22:00,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077760368] [2020-09-21 10:22:00,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:22:00,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:00,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:22:00,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:22:00,089 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 13 states. [2020-09-21 10:22:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:01,000 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-09-21 10:22:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:22:01,001 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-21 10:22:01,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:01,004 INFO L225 Difference]: With dead ends: 108 [2020-09-21 10:22:01,004 INFO L226 Difference]: Without dead ends: 96 [2020-09-21 10:22:01,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:22:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-21 10:22:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-21 10:22:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 10:22:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-09-21 10:22:01,015 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 32 [2020-09-21 10:22:01,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:01,016 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-09-21 10:22:01,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:22:01,016 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-09-21 10:22:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 10:22:01,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:01,017 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-21 10:22:01,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:22:01,018 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:01,018 INFO L82 PathProgramCache]: Analyzing trace with hash 145286649, now seen corresponding path program 2 times [2020-09-21 10:22:01,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:01,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855835523] [2020-09-21 10:22:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:01,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:01,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855835523] [2020-09-21 10:22:01,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:01,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:22:01,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278476600] [2020-09-21 10:22:01,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:22:01,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:01,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:22:01,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:22:01,337 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 10 states. [2020-09-21 10:22:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:02,223 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-09-21 10:22:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:22:02,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-09-21 10:22:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:02,226 INFO L225 Difference]: With dead ends: 118 [2020-09-21 10:22:02,226 INFO L226 Difference]: Without dead ends: 106 [2020-09-21 10:22:02,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:22:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-21 10:22:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2020-09-21 10:22:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 10:22:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-09-21 10:22:02,235 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 35 [2020-09-21 10:22:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:02,236 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-09-21 10:22:02,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:22:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-09-21 10:22:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 10:22:02,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:02,238 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] [2020-09-21 10:22:02,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:22:02,238 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:02,238 INFO L82 PathProgramCache]: Analyzing trace with hash -969799515, now seen corresponding path program 1 times [2020-09-21 10:22:02,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:02,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996554164] [2020-09-21 10:22:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:22:02,315 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:22:02,315 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:22:02,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:22:02,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:22:02 BoogieIcfgContainer [2020-09-21 10:22:02,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:22:02,346 INFO L168 Benchmark]: Toolchain (without parser) took 8946.45 ms. Allocated memory was 136.3 MB in the beginning and 298.3 MB in the end (delta: 162.0 MB). Free memory was 98.3 MB in the beginning and 230.3 MB in the end (delta: -132.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:02,347 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 136.3 MB. Free memory was 117.9 MB in the beginning and 117.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:22:02,348 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.06 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 97.6 MB in the beginning and 168.8 MB in the end (delta: -71.2 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:02,348 INFO L168 Benchmark]: Boogie Preprocessor took 92.39 ms. Allocated memory is still 201.9 MB. Free memory was 168.8 MB in the beginning and 165.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:02,349 INFO L168 Benchmark]: RCFGBuilder took 699.26 ms. Allocated memory is still 201.9 MB. Free memory was 165.2 MB in the beginning and 113.1 MB in the end (delta: 52.1 MB). Peak memory consumption was 52.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:02,350 INFO L168 Benchmark]: TraceAbstraction took 7414.54 ms. Allocated memory was 201.9 MB in the beginning and 298.3 MB in the end (delta: 96.5 MB). Free memory was 112.4 MB in the beginning and 230.3 MB in the end (delta: -117.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:22:02,353 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 136.3 MB. Free memory was 117.9 MB in the beginning and 117.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 731.06 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 97.6 MB in the beginning and 168.8 MB in the end (delta: -71.2 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 92.39 ms. Allocated memory is still 201.9 MB. Free memory was 168.8 MB in the beginning and 165.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 699.26 ms. Allocated memory is still 201.9 MB. Free memory was 165.2 MB in the beginning and 113.1 MB in the end (delta: 52.1 MB). Peak memory consumption was 52.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7414.54 ms. Allocated memory was 201.9 MB in the beginning and 298.3 MB in the end (delta: 96.5 MB). Free memory was 112.4 MB in the beginning and 230.3 MB in the end (delta: -117.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L987] struct TSLL* null = malloc(sizeof(struct TSLL)); [L988] null->next = ((void*)0) [L989] null->prev = ((void*)0) [L990] null->colour = BLACK [L992] struct TSLL* list = malloc(sizeof(struct TSLL)); [L993] list->next = null [L994] list->prev = null [L995] list->colour = BLACK [L997] struct TSLL* end = list; [L1000] COND TRUE __VERIFIER_nondet_int() [L1003] end->next = malloc(sizeof(struct TSLL)) [L1004] EXPR end->next [L1004] end->next->prev = end [L1005] EXPR end->next [L1005] end = end->next [L1006] end->next = null [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1014] end->colour = RED [L1015] end->next = malloc(sizeof(struct TSLL)) [L1016] EXPR end->next [L1016] end->next->prev = end [L1017] EXPR end->next [L1017] end = end->next [L1018] end->next = null [L1019] end->colour = BLACK [L1021] EXPR end->colour [L1021] COND FALSE !(!(BLACK == end->colour)) [L1022] EXPR end->next [L1022] COND FALSE !(!(null == end->next)) [L1023] COND FALSE !(!(null != end)) [L1000] 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)) [L1032] COND TRUE null != end [L1034] EXPR end->colour [L1034] COND FALSE !(RED == end->colour) [L1041] EXPR end->next [L1041] end = end->next [L1032] COND TRUE null != end [L1034] EXPR end->colour [L1034] COND TRUE RED == end->colour [L1036] EXPR end->next [L1036] end = end->next [L1037] COND FALSE !(!(null != end)) [L1038] EXPR end->colour [L1038] COND TRUE !(BLACK != end->colour) [L1038] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.3s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 407 SDtfs, 469 SDslu, 1103 SDs, 0 SdLazy, 1629 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 120 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 277 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 84053 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 7 PerfectInterpolantSequences, 1/21 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...