/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 18:57:30,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:57:30,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:57:30,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:57:30,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:57:30,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:57:30,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:57:30,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:57:30,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:57:30,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:57:30,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:57:30,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:57:30,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:57:30,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:57:30,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:57:30,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:57:30,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:57:30,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:57:30,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:57:30,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:57:30,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:57:30,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:57:30,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:57:30,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:57:30,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:57:30,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:57:30,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:57:30,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:57:30,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:57:30,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:57:30,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:57:30,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:57:30,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:57:30,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:57:30,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:57:30,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:57:30,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:57:30,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:57:30,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:57:30,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:57:30,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:57:30,708 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 [2020-08-21 18:57:30,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:57:30,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:57:30,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:57:30,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:57:30,747 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:57:30,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:57:30,747 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:57:30,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:57:30,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:57:30,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:57:30,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:57:30,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:57:30,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:57:30,748 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:57:30,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:57:30,749 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:57:30,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:57:30,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:57:30,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:57:30,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:57:30,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:57:30,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:57:30,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:57:30,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:57:30,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:57:30,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:57:30,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:57:30,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:57:30,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:57:30,752 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=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:57:31,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:57:31,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:57:31,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:57:31,093 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:57:31,094 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:57:31,094 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 18:57:31,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdcd60d3a/784e07c54c934c0c879c54af87d26a4a/FLAG2c0f7b344 [2020-08-21 18:57:31,699 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:57:31,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 18:57:31,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdcd60d3a/784e07c54c934c0c879c54af87d26a4a/FLAG2c0f7b344 [2020-08-21 18:57:31,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdcd60d3a/784e07c54c934c0c879c54af87d26a4a [2020-08-21 18:57:31,985 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:57:31,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:57:31,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:31,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:57:31,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:57:31,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:31,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c790c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:31, skipping insertion in model container [2020-08-21 18:57:31,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:31" (1/1) ... [2020-08-21 18:57:32,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:57:32,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:57:32,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:32,541 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:57:32,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:32,681 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:57:32,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32 WrapperNode [2020-08-21 18:57:32,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:32,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:57:32,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:57:32,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:57:32,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32" (1/1) ... [2020-08-21 18:57:32,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32" (1/1) ... [2020-08-21 18:57:32,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32" (1/1) ... [2020-08-21 18:57:32,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32" (1/1) ... [2020-08-21 18:57:32,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32" (1/1) ... [2020-08-21 18:57:32,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32" (1/1) ... [2020-08-21 18:57:32,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32" (1/1) ... [2020-08-21 18:57:32,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:57:32,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:57:32,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:57:32,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:57:32,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32" (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 [2020-08-21 18:57:32,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:57:32,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:57:32,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 18:57:32,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 18:57:32,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 18:57:32,859 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-21 18:57:32,860 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-21 18:57:32,860 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-21 18:57:32,860 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-21 18:57:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-21 18:57:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-21 18:57:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-21 18:57:32,862 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-21 18:57:32,862 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-21 18:57:32,862 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-21 18:57:32,863 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-21 18:57:32,863 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-21 18:57:32,863 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-21 18:57:32,863 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-21 18:57:32,863 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-21 18:57:32,864 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-21 18:57:32,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:57:32,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:57:32,865 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 18:57:32,866 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 18:57:32,867 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 18:57:32,867 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 18:57:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 18:57:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 18:57:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 18:57:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 18:57:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 18:57:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 18:57:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 18:57:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 18:57:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 18:57:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 18:57:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 18:57:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 18:57:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 18:57:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 18:57:32,870 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 18:57:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 18:57:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 18:57:32,872 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 18:57:32,873 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 18:57:32,873 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 18:57:32,873 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 18:57:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 18:57:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 18:57:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 18:57:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 18:57:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 18:57:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 18:57:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 18:57:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 18:57:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 18:57:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 18:57:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 18:57:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 18:57:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 18:57:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 18:57:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 18:57:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 18:57:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 18:57:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 18:57:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 18:57:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 18:57:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 18:57:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 18:57:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 18:57:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 18:57:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 18:57:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 18:57:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 18:57:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:57:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 18:57:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 18:57:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 18:57:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 18:57:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 18:57:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 18:57:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 18:57:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 18:57:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 18:57:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 18:57:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 18:57:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 18:57:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 18:57:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 18:57:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 18:57:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 18:57:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 18:57:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 18:57:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 18:57:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 18:57:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 18:57:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 18:57:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 18:57:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 18:57:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 18:57:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 18:57:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 18:57:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 18:57:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 18:57:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 18:57:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 18:57:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 18:57:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 18:57:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 18:57:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 18:57:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 18:57:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 18:57:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 18:57:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 18:57:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 18:57:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 18:57:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 18:57:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 18:57:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:57:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-21 18:57:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-21 18:57:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 18:57:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 18:57:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-21 18:57:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-21 18:57:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 18:57:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-21 18:57:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:57:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 18:57:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 18:57:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:57:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-21 18:57:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-21 18:57:32,903 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-21 18:57:32,903 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-21 18:57:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-21 18:57:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-21 18:57:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-21 18:57:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-21 18:57:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-21 18:57:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-21 18:57:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-21 18:57:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:57:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:57:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:57:33,761 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:57:33,762 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-21 18:57:33,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:33 BoogieIcfgContainer [2020-08-21 18:57:33,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:57:33,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:57:33,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:57:33,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:57:33,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:57:31" (1/3) ... [2020-08-21 18:57:33,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269b457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:33, skipping insertion in model container [2020-08-21 18:57:33,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:32" (2/3) ... [2020-08-21 18:57:33,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269b457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:33, skipping insertion in model container [2020-08-21 18:57:33,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:33" (3/3) ... [2020-08-21 18:57:33,779 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2020-08-21 18:57:33,790 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:57:33,800 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:57:33,816 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:57:33,846 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:57:33,846 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:57:33,846 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:57:33,846 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:57:33,846 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:57:33,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:57:33,847 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:57:33,847 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:57:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-21 18:57:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 18:57:33,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:33,886 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] [2020-08-21 18:57:33,886 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:33,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-21 18:57:33,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:33,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078669211] [2020-08-21 18:57:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:57:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 18:57:34,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078669211] [2020-08-21 18:57:34,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:34,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:57:34,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169782865] [2020-08-21 18:57:34,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:57:34,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:34,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:57:34,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:57:34,434 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-21 18:57:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:34,886 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-21 18:57:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:57:34,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-21 18:57:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:34,904 INFO L225 Difference]: With dead ends: 343 [2020-08-21 18:57:34,904 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 18:57:34,911 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 [2020-08-21 18:57:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 18:57:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-21 18:57:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-21 18:57:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-21 18:57:34,983 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-21 18:57:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:34,984 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-21 18:57:34,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:57:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-21 18:57:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 18:57:34,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:34,988 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] [2020-08-21 18:57:34,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:57:34,989 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:34,990 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-21 18:57:34,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:34,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44011532] [2020-08-21 18:57:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:57:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 18:57:35,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44011532] [2020-08-21 18:57:35,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:57:35,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:57:35,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507905143] [2020-08-21 18:57:35,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:57:35,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:57:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:57:35,511 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-21 18:57:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:36,728 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-21 18:57:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:57:36,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-21 18:57:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:36,732 INFO L225 Difference]: With dead ends: 327 [2020-08-21 18:57:36,734 INFO L226 Difference]: Without dead ends: 179 [2020-08-21 18:57:36,736 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 [2020-08-21 18:57:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-21 18:57:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-21 18:57:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 18:57:36,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-21 18:57:36,773 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-21 18:57:36,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:36,774 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-21 18:57:36,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:57:36,774 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-21 18:57:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 18:57:36,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:36,784 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] [2020-08-21 18:57:36,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:57:36,784 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-21 18:57:36,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:36,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844098760] [2020-08-21 18:57:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:57:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:37,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:57:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 93 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-21 18:57:38,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844098760] [2020-08-21 18:57:38,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:57:38,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 18:57:38,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970439167] [2020-08-21 18:57:38,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 18:57:38,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 18:57:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 18:57:38,360 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 28 states. [2020-08-21 18:57:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:41,533 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2020-08-21 18:57:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:57:41,533 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 18:57:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:41,538 INFO L225 Difference]: With dead ends: 348 [2020-08-21 18:57:41,538 INFO L226 Difference]: Without dead ends: 189 [2020-08-21 18:57:41,541 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 [2020-08-21 18:57:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-21 18:57:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2020-08-21 18:57:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-21 18:57:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2020-08-21 18:57:41,586 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 154 [2020-08-21 18:57:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:41,588 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2020-08-21 18:57:41,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 18:57:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2020-08-21 18:57:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 18:57:41,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:41,592 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] [2020-08-21 18:57:41,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:57:41,593 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-21 18:57:41,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:41,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146002528] [2020-08-21 18:57:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:41,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:41,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:57:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:41,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:57:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-08-21 18:57:42,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146002528] [2020-08-21 18:57:42,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:57:42,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 18:57:42,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841146601] [2020-08-21 18:57:42,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 18:57:42,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 18:57:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:57:42,940 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand 19 states. [2020-08-21 18:57:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:45,434 INFO L93 Difference]: Finished difference Result 360 states and 431 transitions. [2020-08-21 18:57:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 18:57:45,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-21 18:57:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:45,441 INFO L225 Difference]: With dead ends: 360 [2020-08-21 18:57:45,441 INFO L226 Difference]: Without dead ends: 193 [2020-08-21 18:57:45,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:57:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-21 18:57:45,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2020-08-21 18:57:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 18:57:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-08-21 18:57:45,462 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 154 [2020-08-21 18:57:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:45,462 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-08-21 18:57:45,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 18:57:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-08-21 18:57:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 18:57:45,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:45,465 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] [2020-08-21 18:57:45,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:57:45,465 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:45,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1717739637, now seen corresponding path program 1 times [2020-08-21 18:57:45,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:45,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178129055] [2020-08-21 18:57:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:45,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:45,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:57:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:45,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:45,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:45,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:57:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-08-21 18:57:46,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178129055] [2020-08-21 18:57:46,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:57:46,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 18:57:46,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167646931] [2020-08-21 18:57:46,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 18:57:46,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:46,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 18:57:46,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 18:57:46,723 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 28 states. [2020-08-21 18:57:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:49,493 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-21 18:57:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:57:49,494 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 18:57:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:49,497 INFO L225 Difference]: With dead ends: 371 [2020-08-21 18:57:49,497 INFO L226 Difference]: Without dead ends: 198 [2020-08-21 18:57:49,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 18:57:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-21 18:57:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2020-08-21 18:57:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 18:57:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-21 18:57:49,516 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-21 18:57:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:49,517 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-21 18:57:49,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 18:57:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-21 18:57:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 18:57:49,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:49,519 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] [2020-08-21 18:57:49,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:57:49,520 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:49,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-21 18:57:49,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:49,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981630331] [2020-08-21 18:57:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:49,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:49,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:57:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:49,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:57:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:50,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-08-21 18:57:51,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981630331] [2020-08-21 18:57:51,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:57:51,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 18:57:51,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053221382] [2020-08-21 18:57:51,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 18:57:51,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:51,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 18:57:51,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:57:51,190 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 22 states. [2020-08-21 18:57:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:53,439 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2020-08-21 18:57:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 18:57:53,439 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-21 18:57:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:53,445 INFO L225 Difference]: With dead ends: 323 [2020-08-21 18:57:53,446 INFO L226 Difference]: Without dead ends: 254 [2020-08-21 18:57:53,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 18:57:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-21 18:57:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2020-08-21 18:57:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-21 18:57:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-08-21 18:57:53,476 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 154 [2020-08-21 18:57:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:53,478 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-08-21 18:57:53,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 18:57:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-08-21 18:57:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 18:57:53,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:53,481 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] [2020-08-21 18:57:53,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:57:53,482 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-21 18:57:53,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:53,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515300203] [2020-08-21 18:57:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:53,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:53,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:57:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:54,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:54,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:54,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:54,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:54,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:55,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:55,838 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-08-21 18:57:56,717 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 20 [2020-08-21 18:57:57,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:57,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:57,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:57,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:57:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:57,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:57,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:58,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:57:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:58,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:57:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:58,733 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-08-21 18:57:59,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:57:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:59,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:57:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:59,895 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-21 18:57:59,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:58:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat