/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 true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -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 0.1.25-5644d1e-m [2020-08-18 21:07:04,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:07:04,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:07:04,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:07:04,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:07:04,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:07:04,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:07:04,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:07:04,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:07:04,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:07:04,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:07:04,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:07:04,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:07:04,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:07:04,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:07:04,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:07:04,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:07:04,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:07:04,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:07:04,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:07:04,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:07:04,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:07:04,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:07:04,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:07:04,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:07:04,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:07:04,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:07:04,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:07:04,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:07:04,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:07:04,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:07:04,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:07:04,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:07:04,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:07:04,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:07:04,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:07:04,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:07:04,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:07:04,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:07:04,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:07:04,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:07:04,503 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 [2020-08-18 21:07:04,524 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:07:04,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:07:04,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:07:04,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:07:04,526 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:07:04,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:07:04,526 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:07:04,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:07:04,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:07:04,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:07:04,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:07:04,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:07:04,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:07:04,528 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:07:04,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:07:04,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:07:04,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:07:04,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:07:04,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:07:04,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:07:04,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:07:04,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:04,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:07:04,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:07:04,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:07:04,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:07:04,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:07:04,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:07:04,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:07:04,531 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:07:04,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:07:04,820 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:07:04,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:07:04,825 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:07:04,825 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:07:04,826 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-18 21:07:04,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fd578d0e/70a8684ce78742aaa4b0ffdbf48e9d11/FLAGf11dc29bb [2020-08-18 21:07:05,389 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:07:05,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-18 21:07:05,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fd578d0e/70a8684ce78742aaa4b0ffdbf48e9d11/FLAGf11dc29bb [2020-08-18 21:07:05,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4fd578d0e/70a8684ce78742aaa4b0ffdbf48e9d11 [2020-08-18 21:07:05,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:07:05,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:07:05,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:05,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:07:05,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:07:05,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1333f6e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05, skipping insertion in model container [2020-08-18 21:07:05,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:07:05,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:07:06,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:06,292 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:07:06,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:06,416 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:07:06,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06 WrapperNode [2020-08-18 21:07:06,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:06,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:07:06,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:07:06,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:07:06,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (1/1) ... [2020-08-18 21:07:06,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:07:06,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:07:06,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:07:06,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:07:06,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (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 [2020-08-18 21:07:06,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:07:06,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:07:06,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 21:07:06,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 21:07:06,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 21:07:06,579 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-18 21:07:06,579 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-18 21:07:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-18 21:07:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-18 21:07:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-18 21:07:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-18 21:07:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-18 21:07:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-18 21:07:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-18 21:07:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-18 21:07:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-18 21:07:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-18 21:07:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-18 21:07:06,581 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-18 21:07:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-18 21:07:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-18 21:07:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:07:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:07:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 21:07:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 21:07:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 21:07:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 21:07:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 21:07:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 21:07:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 21:07:06,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 21:07:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 21:07:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 21:07:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 21:07:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 21:07:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 21:07:06,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 21:07:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 21:07:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 21:07:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 21:07:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 21:07:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 21:07:06,585 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 21:07:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 21:07:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 21:07:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 21:07:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 21:07:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 21:07:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 21:07:06,586 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 21:07:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 21:07:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 21:07:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 21:07:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 21:07:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 21:07:06,587 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 21:07:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 21:07:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 21:07:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 21:07:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 21:07:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 21:07:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 21:07:06,588 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 21:07:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 21:07:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 21:07:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 21:07:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 21:07:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 21:07:06,589 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 21:07:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 21:07:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 21:07:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 21:07:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 21:07:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 21:07:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 21:07:06,590 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 21:07:06,591 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 21:07:06,591 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 21:07:06,591 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 21:07:06,591 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 21:07:06,591 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 21:07:06,591 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 21:07:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 21:07:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 21:07:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 21:07:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 21:07:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 21:07:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 21:07:06,592 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 21:07:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 21:07:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 21:07:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 21:07:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 21:07:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 21:07:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 21:07:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 21:07:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 21:07:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 21:07:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 21:07:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 21:07:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 21:07:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 21:07:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 21:07:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 21:07:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 21:07:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 21:07:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 21:07:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 21:07:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 21:07:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 21:07:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 21:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 21:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 21:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 21:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 21:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 21:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 21:07:06,596 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 21:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 21:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 21:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 21:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 21:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 21:07:06,597 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 21:07:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 21:07:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 21:07:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 21:07:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 21:07:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:07:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-18 21:07:06,598 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-18 21:07:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 21:07:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 21:07:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-18 21:07:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-18 21:07:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 21:07:06,599 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-18 21:07:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:07:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 21:07:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 21:07:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:07:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-18 21:07:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-18 21:07:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-18 21:07:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-18 21:07:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-18 21:07:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-18 21:07:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-18 21:07:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-18 21:07:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-18 21:07:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-18 21:07:06,602 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-18 21:07:06,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:07:06,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:07:06,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:07:07,329 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:07:07,329 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-18 21:07:07,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:07 BoogieIcfgContainer [2020-08-18 21:07:07,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:07:07,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:07:07,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:07:07,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:07:07,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:05" (1/3) ... [2020-08-18 21:07:07,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416032e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:07, skipping insertion in model container [2020-08-18 21:07:07,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:06" (2/3) ... [2020-08-18 21:07:07,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416032e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:07, skipping insertion in model container [2020-08-18 21:07:07,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:07" (3/3) ... [2020-08-18 21:07:07,342 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2020-08-18 21:07:07,352 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:07:07,359 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:07:07,372 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:07:07,391 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:07:07,392 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:07:07,392 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:07:07,392 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:07:07,392 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:07:07,392 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:07:07,392 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:07:07,393 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:07:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-18 21:07:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 21:07:07,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,424 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] [2020-08-18 21:07:07,424 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-18 21:07:07,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680004654] [2020-08-18 21:07:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 21:07:07,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680004654] [2020-08-18 21:07:07,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:07:07,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506129168] [2020-08-18 21:07:07,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:07:07,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:07:07,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:07,948 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-18 21:07:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:08,504 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-18 21:07:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:07:08,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-18 21:07:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:08,529 INFO L225 Difference]: With dead ends: 343 [2020-08-18 21:07:08,529 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 21:07:08,540 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 [2020-08-18 21:07:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 21:07:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-18 21:07:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-18 21:07:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-18 21:07:08,615 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-18 21:07:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:08,616 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-18 21:07:08,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:07:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-18 21:07:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 21:07:08,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:08,620 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] [2020-08-18 21:07:08,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:07:08,620 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:08,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-18 21:07:08,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:08,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875744460] [2020-08-18 21:07:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 21:07:09,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875744460] [2020-08-18 21:07:09,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:09,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:07:09,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695250661] [2020-08-18 21:07:09,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:07:09,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:07:09,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:07:09,111 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-18 21:07:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:10,189 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-18 21:07:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:07:10,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-18 21:07:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:10,193 INFO L225 Difference]: With dead ends: 327 [2020-08-18 21:07:10,193 INFO L226 Difference]: Without dead ends: 179 [2020-08-18 21:07:10,195 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 [2020-08-18 21:07:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-18 21:07:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-18 21:07:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 21:07:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-18 21:07:10,219 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-18 21:07:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:10,219 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-18 21:07:10,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:07:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-18 21:07:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:07:10,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:10,225 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] [2020-08-18 21:07:10,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:10,225 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:10,226 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-18 21:07:10,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:10,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150678759] [2020-08-18 21:07:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:07:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 93 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 21:07:11,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150678759] [2020-08-18 21:07:11,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:11,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 21:07:11,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290185826] [2020-08-18 21:07:11,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 21:07:11,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 21:07:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-18 21:07:11,865 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 28 states. [2020-08-18 21:07:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:14,788 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2020-08-18 21:07:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 21:07:14,789 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-18 21:07:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:14,793 INFO L225 Difference]: With dead ends: 348 [2020-08-18 21:07:14,793 INFO L226 Difference]: Without dead ends: 189 [2020-08-18 21:07:14,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 21:07:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-18 21:07:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2020-08-18 21:07:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-18 21:07:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2020-08-18 21:07:14,817 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 154 [2020-08-18 21:07:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:14,817 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2020-08-18 21:07:14,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 21:07:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2020-08-18 21:07:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:07:14,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:14,820 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] [2020-08-18 21:07:14,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:07:14,821 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-18 21:07:14,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:14,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267870216] [2020-08-18 21:07:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:14,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:14,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:07:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:15,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-08-18 21:07:16,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267870216] [2020-08-18 21:07:16,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:16,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 21:07:16,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652515327] [2020-08-18 21:07:16,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 21:07:16,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 21:07:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:07:16,110 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand 19 states. [2020-08-18 21:07:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:18,183 INFO L93 Difference]: Finished difference Result 360 states and 431 transitions. [2020-08-18 21:07:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 21:07:18,185 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-18 21:07:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:18,187 INFO L225 Difference]: With dead ends: 360 [2020-08-18 21:07:18,188 INFO L226 Difference]: Without dead ends: 193 [2020-08-18 21:07:18,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-08-18 21:07:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-18 21:07:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2020-08-18 21:07:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-18 21:07:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-08-18 21:07:18,210 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 154 [2020-08-18 21:07:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:18,213 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-08-18 21:07:18,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 21:07:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-08-18 21:07:18,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:07:18,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:18,216 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] [2020-08-18 21:07:18,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:07:18,216 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1717739637, now seen corresponding path program 1 times [2020-08-18 21:07:18,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:18,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103620899] [2020-08-18 21:07:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:18,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:07:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-08-18 21:07:19,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103620899] [2020-08-18 21:07:19,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:19,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 21:07:19,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119751113] [2020-08-18 21:07:19,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 21:07:19,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:19,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 21:07:19,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-18 21:07:19,563 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 28 states. [2020-08-18 21:07:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:22,189 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-18 21:07:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 21:07:22,189 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-18 21:07:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:22,193 INFO L225 Difference]: With dead ends: 371 [2020-08-18 21:07:22,193 INFO L226 Difference]: Without dead ends: 198 [2020-08-18 21:07:22,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 21:07:22,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-18 21:07:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2020-08-18 21:07:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 21:07:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-18 21:07:22,228 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-18 21:07:22,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:22,230 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-18 21:07:22,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 21:07:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-18 21:07:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:07:22,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:22,235 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] [2020-08-18 21:07:22,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:07:22,242 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:22,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-18 21:07:22,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:22,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017990565] [2020-08-18 21:07:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:22,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:07:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-08-18 21:07:23,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017990565] [2020-08-18 21:07:23,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:23,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 21:07:23,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330604063] [2020-08-18 21:07:23,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 21:07:23,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:23,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 21:07:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-18 21:07:23,602 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 22 states. [2020-08-18 21:07:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:25,667 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2020-08-18 21:07:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 21:07:25,668 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-18 21:07:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:25,673 INFO L225 Difference]: With dead ends: 323 [2020-08-18 21:07:25,674 INFO L226 Difference]: Without dead ends: 254 [2020-08-18 21:07:25,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 21:07:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-18 21:07:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2020-08-18 21:07:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 21:07:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-08-18 21:07:25,701 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 154 [2020-08-18 21:07:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:25,702 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-08-18 21:07:25,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 21:07:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-08-18 21:07:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 21:07:25,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:25,705 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] [2020-08-18 21:07:25,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:07:25,706 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:25,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:25,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-18 21:07:25,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:25,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594628329] [2020-08-18 21:07:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:25,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:25,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:07:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:26,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:26,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:26,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:26,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,889 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-08-18 21:07:28,609 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 20 [2020-08-18 21:07:28,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:07:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:30,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:07:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:30,570 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-08-18 21:07:30,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:07:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:31,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:07:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:31,662 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-18 21:07:31,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:08:00,010 WARN L193 SmtUtils]: Spent 3.81 s on a formula simplification. DAG size of input: 449 DAG size of output: 50