/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=NARROWEST -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 21:55:27,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:55:27,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:55:27,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:55:27,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:55:27,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:55:27,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:55:27,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:55:27,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:55:27,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:55:27,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:55:27,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:55:27,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:55:27,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:55:27,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:55:27,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:55:27,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:55:27,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:55:27,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:55:27,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:55:27,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:55:27,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:55:27,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:55:27,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:55:27,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:55:27,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:55:27,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:55:27,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:55:27,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:55:27,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:55:27,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:55:27,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:55:27,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:55:27,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:55:27,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:55:27,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:55:27,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:55:27,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:55:27,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:55:27,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:55:27,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:55:27,655 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 21:55:27,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:55:27,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:55:27,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:55:27,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:55:27,681 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:55:27,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:55:27,681 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:55:27,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:55:27,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:55:27,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:55:27,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:55:27,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:55:27,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:55:27,683 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:55:27,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:55:27,683 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:55:27,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:55:27,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:55:27,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:55:27,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:55:27,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:55:27,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:27,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:55:27,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:55:27,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:55:27,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:55:27,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:55:27,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:55:27,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:55:27,686 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=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:55:28,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:55:28,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:55:28,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:55:28,026 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:55:28,026 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:55:28,027 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-18 21:55:28,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e77aed4dd/f289c463c3de40049d3bc169b0e16c9b/FLAG286b2013e [2020-08-18 21:55:28,702 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:55:28,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-18 21:55:28,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e77aed4dd/f289c463c3de40049d3bc169b0e16c9b/FLAG286b2013e [2020-08-18 21:55:28,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e77aed4dd/f289c463c3de40049d3bc169b0e16c9b [2020-08-18 21:55:28,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:55:28,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:55:28,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:28,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:55:28,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:55:28,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:28,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef53ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:28, skipping insertion in model container [2020-08-18 21:55:28,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:28" (1/1) ... [2020-08-18 21:55:28,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:55:28,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:55:29,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:29,534 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:55:29,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:29,662 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:55:29,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29 WrapperNode [2020-08-18 21:55:29,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:29,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:55:29,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:55:29,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:55:29,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29" (1/1) ... [2020-08-18 21:55:29,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29" (1/1) ... [2020-08-18 21:55:29,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29" (1/1) ... [2020-08-18 21:55:29,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29" (1/1) ... [2020-08-18 21:55:29,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29" (1/1) ... [2020-08-18 21:55:29,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29" (1/1) ... [2020-08-18 21:55:29,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29" (1/1) ... [2020-08-18 21:55:29,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:55:29,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:55:29,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:55:29,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:55:29,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29" (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 21:55:29,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:55:29,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:55:29,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 21:55:29,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 21:55:29,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 21:55:29,825 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-18 21:55:29,826 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-18 21:55:29,826 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-18 21:55:29,826 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-18 21:55:29,826 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-18 21:55:29,826 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-18 21:55:29,826 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-18 21:55:29,827 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-18 21:55:29,827 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-18 21:55:29,827 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-18 21:55:29,827 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-18 21:55:29,827 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-18 21:55:29,827 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-18 21:55:29,828 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-18 21:55:29,828 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-18 21:55:29,828 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-18 21:55:29,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:55:29,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:55:29,828 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 21:55:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 21:55:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 21:55:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 21:55:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 21:55:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 21:55:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 21:55:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 21:55:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 21:55:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 21:55:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 21:55:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 21:55:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 21:55:29,831 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 21:55:29,831 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 21:55:29,831 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 21:55:29,831 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 21:55:29,831 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 21:55:29,831 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 21:55:29,832 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 21:55:29,832 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 21:55:29,832 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 21:55:29,832 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 21:55:29,832 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 21:55:29,832 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 21:55:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 21:55:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 21:55:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 21:55:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 21:55:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 21:55:29,833 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 21:55:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 21:55:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 21:55:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 21:55:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 21:55:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 21:55:29,834 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 21:55:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 21:55:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 21:55:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 21:55:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 21:55:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 21:55:29,835 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 21:55:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 21:55:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 21:55:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 21:55:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 21:55:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 21:55:29,836 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 21:55:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 21:55:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 21:55:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 21:55:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 21:55:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 21:55:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 21:55:29,837 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 21:55:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 21:55:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 21:55:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 21:55:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 21:55:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 21:55:29,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 21:55:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 21:55:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 21:55:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 21:55:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 21:55:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 21:55:29,839 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 21:55:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 21:55:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 21:55:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 21:55:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 21:55:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 21:55:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 21:55:29,840 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 21:55:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 21:55:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 21:55:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 21:55:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 21:55:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 21:55:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 21:55:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 21:55:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 21:55:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 21:55:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 21:55:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 21:55:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 21:55:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 21:55:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 21:55:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 21:55:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 21:55:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 21:55:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 21:55:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 21:55:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 21:55:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 21:55:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 21:55:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 21:55:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 21:55:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 21:55:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 21:55:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 21:55:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 21:55:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 21:55:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 21:55:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:55:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-18 21:55:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-18 21:55:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 21:55:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 21:55:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-18 21:55:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-18 21:55:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 21:55:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-18 21:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 21:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 21:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-18 21:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-18 21:55:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-18 21:55:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-18 21:55:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-18 21:55:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-18 21:55:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-18 21:55:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-18 21:55:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-18 21:55:29,848 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-18 21:55:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-18 21:55:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:55:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:55:29,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:55:30,628 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:55:30,628 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-18 21:55:30,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:30 BoogieIcfgContainer [2020-08-18 21:55:30,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:55:30,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:55:30,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:55:30,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:55:30,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:55:28" (1/3) ... [2020-08-18 21:55:30,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568eb6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:30, skipping insertion in model container [2020-08-18 21:55:30,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:29" (2/3) ... [2020-08-18 21:55:30,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568eb6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:30, skipping insertion in model container [2020-08-18 21:55:30,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:30" (3/3) ... [2020-08-18 21:55:30,643 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2020-08-18 21:55:30,655 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:55:30,664 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:55:30,681 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:55:30,709 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:55:30,710 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:55:30,710 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:55:30,710 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:55:30,711 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:55:30,711 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:55:30,711 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:55:30,711 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:55:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-18 21:55:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 21:55:30,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,749 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 21:55:30,750 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-18 21:55:30,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186063246] [2020-08-18 21:55:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:55:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:31,329 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 21:55:31,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186063246] [2020-08-18 21:55:31,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:31,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:55:31,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652451897] [2020-08-18 21:55:31,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:55:31,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:31,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:55:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:55:31,361 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-18 21:55:31,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:31,816 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-18 21:55:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:55:31,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-18 21:55:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:31,833 INFO L225 Difference]: With dead ends: 343 [2020-08-18 21:55:31,833 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 21:55:31,840 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 21:55:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 21:55:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-18 21:55:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-18 21:55:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-18 21:55:31,915 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-18 21:55:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:31,915 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-18 21:55:31,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:55:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-18 21:55:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 21:55:31,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:31,920 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 21:55:31,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:55:31,920 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:31,921 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-18 21:55:31,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:31,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308722365] [2020-08-18 21:55:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:55:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:32,442 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 21:55:32,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308722365] [2020-08-18 21:55:32,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:55:32,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:55:32,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388728384] [2020-08-18 21:55:32,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:55:32,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:55:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:55:32,446 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-18 21:55:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:33,648 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-18 21:55:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:55:33,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-18 21:55:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:33,652 INFO L225 Difference]: With dead ends: 327 [2020-08-18 21:55:33,653 INFO L226 Difference]: Without dead ends: 179 [2020-08-18 21:55:33,655 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 21:55:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-18 21:55:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-18 21:55:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 21:55:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-18 21:55:33,679 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-18 21:55:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:33,679 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-18 21:55:33,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:55:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-18 21:55:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:55:33,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:33,685 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 21:55:33,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:55:33,686 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:33,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:33,686 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-18 21:55:33,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:33,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556913850] [2020-08-18 21:55:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:33,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:33,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:55:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:34,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:55:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:35,390 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 21:55:35,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556913850] [2020-08-18 21:55:35,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:55:35,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 21:55:35,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958063246] [2020-08-18 21:55:35,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 21:55:35,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:35,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 21:55:35,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-18 21:55:35,396 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 28 states. [2020-08-18 21:55:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:38,441 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2020-08-18 21:55:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 21:55:38,442 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-18 21:55:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:38,447 INFO L225 Difference]: With dead ends: 348 [2020-08-18 21:55:38,451 INFO L226 Difference]: Without dead ends: 189 [2020-08-18 21:55:38,453 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 21:55:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-18 21:55:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2020-08-18 21:55:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-18 21:55:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2020-08-18 21:55:38,480 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 154 [2020-08-18 21:55:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:38,481 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2020-08-18 21:55:38,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 21:55:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2020-08-18 21:55:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:55:38,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:38,484 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 21:55:38,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:55:38,484 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-18 21:55:38,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:38,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282518797] [2020-08-18 21:55:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:38,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:38,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:55:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:38,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:38,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:55:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:39,896 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 21:55:39,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282518797] [2020-08-18 21:55:39,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:55:39,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 21:55:39,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145658453] [2020-08-18 21:55:39,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 21:55:39,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:39,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 21:55:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:55:39,900 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand 19 states. [2020-08-18 21:55:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:42,063 INFO L93 Difference]: Finished difference Result 360 states and 431 transitions. [2020-08-18 21:55:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 21:55:42,064 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-18 21:55:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:42,066 INFO L225 Difference]: With dead ends: 360 [2020-08-18 21:55:42,067 INFO L226 Difference]: Without dead ends: 193 [2020-08-18 21:55:42,068 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 21:55:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-18 21:55:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2020-08-18 21:55:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-18 21:55:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-08-18 21:55:42,089 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 154 [2020-08-18 21:55:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:42,090 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-08-18 21:55:42,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 21:55:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-08-18 21:55:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:55:42,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:42,094 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 21:55:42,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:55:42,094 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1717739637, now seen corresponding path program 1 times [2020-08-18 21:55:42,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:42,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431326471] [2020-08-18 21:55:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:55:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:42,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:55:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:43,711 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 21:55:43,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431326471] [2020-08-18 21:55:43,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:55:43,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 21:55:43,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933768182] [2020-08-18 21:55:43,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 21:55:43,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:43,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 21:55:43,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-18 21:55:43,715 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 28 states. [2020-08-18 21:55:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:46,576 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-18 21:55:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 21:55:46,577 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-18 21:55:46,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:46,580 INFO L225 Difference]: With dead ends: 371 [2020-08-18 21:55:46,580 INFO L226 Difference]: Without dead ends: 198 [2020-08-18 21:55:46,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 21:55:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-18 21:55:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2020-08-18 21:55:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 21:55:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-18 21:55:46,614 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-18 21:55:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:46,614 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-18 21:55:46,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 21:55:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-18 21:55:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:55:46,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:46,618 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 21:55:46,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:55:46,618 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:46,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-18 21:55:46,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:46,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227086782] [2020-08-18 21:55:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:46,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:46,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:55:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:55:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:47,949 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 21:55:47,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227086782] [2020-08-18 21:55:47,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:55:47,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 21:55:47,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203990842] [2020-08-18 21:55:47,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 21:55:47,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 21:55:47,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-18 21:55:47,953 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 22 states. [2020-08-18 21:55:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:50,123 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2020-08-18 21:55:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 21:55:50,124 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-18 21:55:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:50,128 INFO L225 Difference]: With dead ends: 323 [2020-08-18 21:55:50,128 INFO L226 Difference]: Without dead ends: 254 [2020-08-18 21:55:50,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 21:55:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-18 21:55:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2020-08-18 21:55:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 21:55:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-08-18 21:55:50,148 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 154 [2020-08-18 21:55:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:50,149 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-08-18 21:55:50,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 21:55:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-08-18 21:55:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 21:55:50,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:50,152 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 21:55:50,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:55:50,152 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-18 21:55:50,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:50,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459814315] [2020-08-18 21:55:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:50,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:50,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:55:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:50,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:50,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:51,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:51,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:51,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:51,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:52,225 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-08-18 21:55:53,103 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 20 [2020-08-18 21:55:53,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:53,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:53,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:53,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:55:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:53,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:54,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:54,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:55:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:54,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:55:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:55,166 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-08-18 21:55:55,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:55:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:55,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:55:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:56,171 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-18 21:55:56,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat