/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/heap-manipulation/dll_of_dll-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:50:55,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:50:55,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:50:55,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:50:55,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:50:55,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:50:55,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:50:55,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:50:55,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:50:55,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:50:55,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:50:55,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:50:55,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:50:55,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:50:55,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:50:55,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:50:55,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:50:55,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:50:55,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:50:55,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:50:55,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:50:55,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:50:55,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:50:55,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:50:55,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:50:55,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:50:55,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:50:55,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:50:55,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:50:55,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:50:55,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:50:55,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:50:55,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:50:55,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:50:55,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:50:55,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:50:55,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:50:55,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:50:55,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:50:55,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:50:55,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:50:55,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-27 21:50:55,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:50:55,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:50:55,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:50:55,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:50:55,402 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:50:55,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:50:55,402 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:50:55,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:50:55,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:50:55,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:50:55,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:50:55,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:50:55,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:50:55,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:50:55,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:50:55,406 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:50:55,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:50:55,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:50:55,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:50:55,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:50:55,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:50:55,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:55,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:50:55,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:50:55,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:50:55,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:50:55,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:50:55,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:50:55,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:50:55,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:50:55,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:50:55,968 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:50:55,974 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:50:55,976 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:50:55,977 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:50:55,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-27 21:50:56,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8205ac9ea/1fdad90a56bf4a56bc8baa1c17afa98a/FLAG0e586cf4f [2020-08-27 21:50:56,708 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:50:56,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-27 21:50:56,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8205ac9ea/1fdad90a56bf4a56bc8baa1c17afa98a/FLAG0e586cf4f [2020-08-27 21:50:56,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8205ac9ea/1fdad90a56bf4a56bc8baa1c17afa98a [2020-08-27 21:50:56,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:50:56,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:50:56,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:56,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:50:57,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:50:57,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:57,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be095dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57, skipping insertion in model container [2020-08-27 21:50:57,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:57,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:50:57,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:50:57,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:57,617 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:50:57,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:57,752 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:50:57,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57 WrapperNode [2020-08-27 21:50:57,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:57,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:50:57,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:50:57,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:50:57,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... [2020-08-27 21:50:57,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:50:57,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:50:57,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:50:57,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:50:57,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:57,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:50:57,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:50:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-27 21:50:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-27 21:50:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-27 21:50:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-27 21:50:57,955 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-27 21:50:57,956 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-27 21:50:57,956 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-27 21:50:57,956 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-27 21:50:57,956 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-27 21:50:57,956 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-27 21:50:57,957 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-27 21:50:57,957 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-27 21:50:57,957 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-27 21:50:57,957 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-27 21:50:57,958 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-27 21:50:57,958 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-27 21:50:57,958 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-27 21:50:57,958 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-27 21:50:57,958 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-27 21:50:57,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:50:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:50:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-27 21:50:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-27 21:50:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-27 21:50:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-27 21:50:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-27 21:50:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-27 21:50:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-27 21:50:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-27 21:50:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-27 21:50:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-27 21:50:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-27 21:50:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-27 21:50:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-27 21:50:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-27 21:50:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-27 21:50:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-27 21:50:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-27 21:50:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-27 21:50:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-27 21:50:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-27 21:50:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-27 21:50:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-27 21:50:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-27 21:50:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-27 21:50:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-27 21:50:57,963 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-27 21:50:57,964 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-27 21:50:57,964 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-27 21:50:57,964 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-27 21:50:57,964 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-27 21:50:57,964 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-27 21:50:57,964 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-27 21:50:57,965 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-27 21:50:57,965 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-27 21:50:57,965 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-27 21:50:57,965 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-27 21:50:57,965 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-27 21:50:57,965 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-27 21:50:57,966 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-27 21:50:57,966 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-27 21:50:57,966 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-27 21:50:57,966 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-27 21:50:57,966 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-27 21:50:57,966 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-27 21:50:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-27 21:50:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-27 21:50:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-27 21:50:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-27 21:50:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-27 21:50:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-27 21:50:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-27 21:50:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-27 21:50:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:50:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-27 21:50:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-27 21:50:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-27 21:50:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-27 21:50:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-27 21:50:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-27 21:50:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-27 21:50:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-27 21:50:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-27 21:50:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-27 21:50:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-27 21:50:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-27 21:50:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-27 21:50:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-27 21:50:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-27 21:50:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-27 21:50:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-27 21:50:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-27 21:50:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-27 21:50:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-27 21:50:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-27 21:50:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-27 21:50:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-27 21:50:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-27 21:50:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-27 21:50:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-27 21:50:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-27 21:50:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-27 21:50:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-27 21:50:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-27 21:50:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-27 21:50:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-27 21:50:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-27 21:50:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-27 21:50:57,973 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-27 21:50:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-27 21:50:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-27 21:50:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-27 21:50:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-27 21:50:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-27 21:50:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-27 21:50:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-27 21:50:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-27 21:50:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-27 21:50:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-27 21:50:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-27 21:50:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-27 21:50:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-27 21:50:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-27 21:50:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-27 21:50:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-27 21:50:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-27 21:50:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:50:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-27 21:50:57,977 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-27 21:50:57,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:50:57,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-27 21:50:57,977 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-27 21:50:57,977 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-27 21:50:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-27 21:50:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-27 21:50:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-27 21:50:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-27 21:50:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-27 21:50:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:50:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-27 21:50:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-27 21:50:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-27 21:50:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-27 21:50:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-27 21:50:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-27 21:50:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-27 21:50:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-27 21:50:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-27 21:50:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-27 21:50:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-27 21:50:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:50:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:50:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:50:58,885 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:50:58,885 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-27 21:50:58,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:58 BoogieIcfgContainer [2020-08-27 21:50:58,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:50:58,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:50:58,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:50:58,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:50:58,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:50:56" (1/3) ... [2020-08-27 21:50:58,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bca7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:58, skipping insertion in model container [2020-08-27 21:50:58,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:57" (2/3) ... [2020-08-27 21:50:58,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bca7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:58, skipping insertion in model container [2020-08-27 21:50:58,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:58" (3/3) ... [2020-08-27 21:50:58,902 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2020-08-27 21:50:58,915 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:50:58,926 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:50:58,949 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:50:58,983 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:50:58,983 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:50:58,983 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:50:58,984 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:50:58,984 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:50:58,984 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:50:58,984 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:50:58,984 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:50:59,013 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-27 21:50:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-27 21:50:59,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:59,026 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-27 21:50:59,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015186283] [2020-08-27 21:50:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:50:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:50:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:50:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:50:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:50:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:50:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:50:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-27 21:50:59,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015186283] [2020-08-27 21:50:59,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:50:59,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975331944] [2020-08-27 21:50:59,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:50:59,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:50:59,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:50:59,698 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-27 21:51:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:00,199 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-27 21:51:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 21:51:00,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-27 21:51:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:00,219 INFO L225 Difference]: With dead ends: 343 [2020-08-27 21:51:00,220 INFO L226 Difference]: Without dead ends: 166 [2020-08-27 21:51:00,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:51:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-27 21:51:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-27 21:51:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-27 21:51:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-27 21:51:00,309 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-27 21:51:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,310 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-27 21:51:00,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:51:00,310 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-27 21:51:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-27 21:51:00,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:00,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:51:00,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-27 21:51:00,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707003269] [2020-08-27 21:51:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:51:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-27 21:51:00,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707003269] [2020-08-27 21:51:00,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:51:00,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-27 21:51:00,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678913259] [2020-08-27 21:51:00,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-27 21:51:00,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-27 21:51:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:51:00,834 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-27 21:51:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:02,083 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-27 21:51:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:51:02,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-27 21:51:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:02,086 INFO L225 Difference]: With dead ends: 327 [2020-08-27 21:51:02,087 INFO L226 Difference]: Without dead ends: 179 [2020-08-27 21:51:02,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-27 21:51:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-27 21:51:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-27 21:51:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-27 21:51:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-27 21:51:02,117 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-27 21:51:02,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:02,118 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-27 21:51:02,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-27 21:51:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-27 21:51:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-27 21:51:02,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:02,122 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:02,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:51:02,122 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:02,123 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-27 21:51:02,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:02,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290501722] [2020-08-27 21:51:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:51:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:03,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-27 21:51:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 93 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-27 21:51:04,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290501722] [2020-08-27 21:51:04,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:51:04,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-27 21:51:04,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250500586] [2020-08-27 21:51:04,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-27 21:51:04,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:04,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-27 21:51:04,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-27 21:51:04,377 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 28 states. [2020-08-27 21:51:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:07,957 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2020-08-27 21:51:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-27 21:51:07,958 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-27 21:51:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:07,961 INFO L225 Difference]: With dead ends: 348 [2020-08-27 21:51:07,961 INFO L226 Difference]: Without dead ends: 189 [2020-08-27 21:51:07,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-27 21:51:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-27 21:51:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2020-08-27 21:51:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-27 21:51:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2020-08-27 21:51:08,007 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 154 [2020-08-27 21:51:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:08,009 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2020-08-27 21:51:08,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-27 21:51:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2020-08-27 21:51:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-27 21:51:08,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:08,016 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:08,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:51:08,018 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:08,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:08,018 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-27 21:51:08,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:08,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875749016] [2020-08-27 21:51:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:08,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:08,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:51:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:08,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:08,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:08,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:08,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-27 21:51:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-08-27 21:51:09,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875749016] [2020-08-27 21:51:09,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:51:09,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-27 21:51:09,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518805310] [2020-08-27 21:51:09,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-27 21:51:09,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-27 21:51:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-27 21:51:09,741 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand 19 states. [2020-08-27 21:51:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:12,239 INFO L93 Difference]: Finished difference Result 360 states and 431 transitions. [2020-08-27 21:51:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-27 21:51:12,239 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-27 21:51:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:12,243 INFO L225 Difference]: With dead ends: 360 [2020-08-27 21:51:12,244 INFO L226 Difference]: Without dead ends: 193 [2020-08-27 21:51:12,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-08-27 21:51:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-27 21:51:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2020-08-27 21:51:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-27 21:51:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-08-27 21:51:12,266 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 154 [2020-08-27 21:51:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:12,267 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-08-27 21:51:12,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-27 21:51:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-08-27 21:51:12,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-27 21:51:12,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:12,270 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:12,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:51:12,271 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:12,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1717739637, now seen corresponding path program 1 times [2020-08-27 21:51:12,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:12,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922806844] [2020-08-27 21:51:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:12,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:12,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:51:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:12,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:12,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-27 21:51:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:13,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-08-27 21:51:14,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922806844] [2020-08-27 21:51:14,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:51:14,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-27 21:51:14,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611438232] [2020-08-27 21:51:14,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-27 21:51:14,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-27 21:51:14,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-27 21:51:14,243 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 28 states. [2020-08-27 21:51:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:17,443 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-27 21:51:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-27 21:51:17,444 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-27 21:51:17,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:17,448 INFO L225 Difference]: With dead ends: 371 [2020-08-27 21:51:17,449 INFO L226 Difference]: Without dead ends: 198 [2020-08-27 21:51:17,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-27 21:51:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-27 21:51:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2020-08-27 21:51:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-27 21:51:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-27 21:51:17,468 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-27 21:51:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:17,468 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-27 21:51:17,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-27 21:51:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-27 21:51:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-27 21:51:17,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:17,471 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:17,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:51:17,472 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-27 21:51:17,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:17,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458329457] [2020-08-27 21:51:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:17,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:17,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:51:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-27 21:51:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:18,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:19,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:19,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:19,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:19,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:19,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:19,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:19,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:19,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-08-27 21:51:19,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458329457] [2020-08-27 21:51:19,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:51:19,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-27 21:51:19,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855592734] [2020-08-27 21:51:19,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-27 21:51:19,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:19,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-27 21:51:19,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-27 21:51:19,312 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 22 states. [2020-08-27 21:51:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:21,952 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2020-08-27 21:51:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-27 21:51:21,952 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-27 21:51:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:21,957 INFO L225 Difference]: With dead ends: 323 [2020-08-27 21:51:21,957 INFO L226 Difference]: Without dead ends: 254 [2020-08-27 21:51:21,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-27 21:51:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-27 21:51:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2020-08-27 21:51:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-27 21:51:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-08-27 21:51:21,977 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 154 [2020-08-27 21:51:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:21,977 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-08-27 21:51:21,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-27 21:51:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-08-27 21:51:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-27 21:51:21,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:21,980 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:21,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:51:21,981 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:21,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-27 21:51:21,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:21,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54847957] [2020-08-27 21:51:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:22,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:22,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:51:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:22,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:22,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:23,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:23,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:23,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:23,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:24,610 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-08-27 21:51:25,511 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 20 [2020-08-27 21:51:25,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:26,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:26,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:26,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-27 21:51:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:26,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:26,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:26,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-27 21:51:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:27,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:51:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:27,713 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-08-27 21:51:28,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:51:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:28,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:51:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:29,210 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-27 21:51:29,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat