./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_ensure_capacity_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_array_list_ensure_capacity_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c12ad62b7b197015493bfb3c1dd9a5de2922d9b16e39f249961c276d8b82591b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:27:41,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:27:41,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:27:41,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:27:41,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:27:41,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:27:41,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:27:41,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:27:41,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:27:41,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:27:41,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:27:41,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:27:41,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:27:41,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:27:41,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:27:41,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:27:41,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:27:41,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:27:41,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:27:41,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:27:41,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:27:41,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:27:41,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:27:41,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:27:41,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:27:41,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:27:41,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:27:41,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:27:41,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:27:41,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:27:41,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:27:41,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:27:41,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:27:41,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:27:41,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:27:41,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:27:41,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:27:41,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:27:41,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:27:41,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:27:41,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:27:41,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 15:27:41,855 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:27:41,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:27:41,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:27:41,856 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:27:41,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:27:41,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:27:41,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:27:41,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:27:41,857 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:27:41,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:27:41,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:27:41,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:27:41,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:27:41,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:27:41,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:27:41,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:27:41,859 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:27:41,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:27:41,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:27:41,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:27:41,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:27:41,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:27:41,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:27:41,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:27:41,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:27:41,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:27:41,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:27:41,861 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:27:41,861 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:27:41,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:27:41,862 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:27:41,862 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12ad62b7b197015493bfb3c1dd9a5de2922d9b16e39f249961c276d8b82591b [2021-12-21 15:27:42,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:27:42,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:27:42,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:27:42,028 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:27:42,028 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:27:42,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_ensure_capacity_harness.i [2021-12-21 15:27:42,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08a20287/8e936ee89e324a328443fb5e56e59be1/FLAGfb10f4c67 [2021-12-21 15:27:42,582 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:27:42,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_ensure_capacity_harness.i [2021-12-21 15:27:42,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08a20287/8e936ee89e324a328443fb5e56e59be1/FLAGfb10f4c67 [2021-12-21 15:27:43,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08a20287/8e936ee89e324a328443fb5e56e59be1 [2021-12-21 15:27:43,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:27:43,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:27:43,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:27:43,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:27:43,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:27:43,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:27:43" (1/1) ... [2021-12-21 15:27:43,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d93e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:43, skipping insertion in model container [2021-12-21 15:27:43,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:27:43" (1/1) ... [2021-12-21 15:27:43,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:27:43,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:27:43,339 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_ensure_capacity_harness.i[4504,4517] [2021-12-21 15:27:43,344 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_ensure_capacity_harness.i[4564,4577] [2021-12-21 15:27:43,765 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:27:43,813 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,814 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,814 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,816 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,816 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,828 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,829 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,830 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,830 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,831 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,831 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,832 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:43,832 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,003 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:27:44,004 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:27:44,004 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:27:44,005 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:27:44,006 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:27:44,006 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:27:44,006 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:27:44,007 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:27:44,007 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:27:44,008 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:27:44,088 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,088 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,106 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,152 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:27:44,181 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:27:44,190 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_ensure_capacity_harness.i[4504,4517] [2021-12-21 15:27:44,190 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_ensure_capacity_harness.i[4564,4577] [2021-12-21 15:27:44,206 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-21 15:27:44,245 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,245 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,245 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,245 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,246 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,249 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,249 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,250 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,250 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,251 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,251 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,251 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,251 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,298 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-21 15:27:44,300 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-21 15:27:44,301 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-21 15:27:44,301 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-21 15:27:44,303 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-21 15:27:44,304 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-21 15:27:44,304 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-21 15:27:44,306 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-21 15:27:44,306 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-21 15:27:44,307 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-21 15:27:44,333 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,344 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,345 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,347 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,357 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-21 15:27:44,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:27:44,520 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:27:44,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44 WrapperNode [2021-12-21 15:27:44,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:27:44,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:27:44,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:27:44,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:27:44,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,650 INFO L137 Inliner]: procedures = 691, calls = 1684, calls flagged for inlining = 52, calls inlined = 11, statements flattened = 804 [2021-12-21 15:27:44,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:27:44,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:27:44,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:27:44,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:27:44,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:27:44,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:27:44,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:27:44,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:27:44,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (1/1) ... [2021-12-21 15:27:44,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:27:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:44,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 15:27:44,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 15:27:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:27:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-21 15:27:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-21 15:27:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-21 15:27:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-21 15:27:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-21 15:27:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-21 15:27:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-12-21 15:27:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-12-21 15:27:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:27:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-21 15:27:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-21 15:27:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 15:27:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 15:27:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:27:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:27:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 15:27:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-12-21 15:27:44,795 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-12-21 15:27:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:27:44,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:27:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-21 15:27:44,795 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-21 15:27:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-21 15:27:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-21 15:27:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-21 15:27:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-21 15:27:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-12-21 15:27:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-12-21 15:27:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-21 15:27:44,797 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-21 15:27:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 15:27:44,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 15:27:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-12-21 15:27:44,798 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-12-21 15:27:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-12-21 15:27:44,798 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-12-21 15:27:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:27:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-12-21 15:27:44,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-12-21 15:27:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 15:27:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 15:27:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-21 15:27:44,799 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-21 15:27:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-21 15:27:44,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-21 15:27:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-12-21 15:27:44,800 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-12-21 15:27:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_ensure_capacity [2021-12-21 15:27:44,800 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_ensure_capacity [2021-12-21 15:27:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:27:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-12-21 15:27:44,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-12-21 15:27:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:27:45,050 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:27:45,052 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:27:45,752 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:27:45,761 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:27:45,761 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 15:27:45,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:27:45 BoogieIcfgContainer [2021-12-21 15:27:45,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:27:45,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:27:45,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:27:45,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:27:45,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:27:43" (1/3) ... [2021-12-21 15:27:45,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566fc04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:27:45, skipping insertion in model container [2021-12-21 15:27:45,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:27:44" (2/3) ... [2021-12-21 15:27:45,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566fc04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:27:45, skipping insertion in model container [2021-12-21 15:27:45,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:27:45" (3/3) ... [2021-12-21 15:27:45,774 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_ensure_capacity_harness.i [2021-12-21 15:27:45,779 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:27:45,779 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:27:45,818 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:27:45,825 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:27:45,825 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 15:27:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 241 states, 145 states have (on average 1.206896551724138) internal successors, (175), 146 states have internal predecessors, (175), 73 states have call successors, (73), 21 states have call predecessors, (73), 21 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-12-21 15:27:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-21 15:27:45,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:45,861 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:45,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:45,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1087274047, now seen corresponding path program 1 times [2021-12-21 15:27:45,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:45,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706949509] [2021-12-21 15:27:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:45,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:27:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 15:27:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:27:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:27:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:27:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 15:27:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:27:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 15:27:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 15:27:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 15:27:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 15:27:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 15:27:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:27:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:27:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 15:27:46,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:27:46,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706949509] [2021-12-21 15:27:46,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706949509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:27:46,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:27:46,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:27:46,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123346387] [2021-12-21 15:27:46,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:27:46,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:27:46,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:27:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:27:46,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:27:46,459 INFO L87 Difference]: Start difference. First operand has 241 states, 145 states have (on average 1.206896551724138) internal successors, (175), 146 states have internal predecessors, (175), 73 states have call successors, (73), 21 states have call predecessors, (73), 21 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:27:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:27:46,939 INFO L93 Difference]: Finished difference Result 502 states and 720 transitions. [2021-12-21 15:27:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:27:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2021-12-21 15:27:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:27:46,958 INFO L225 Difference]: With dead ends: 502 [2021-12-21 15:27:46,958 INFO L226 Difference]: Without dead ends: 257 [2021-12-21 15:27:46,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:27:46,970 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 78 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 15:27:46,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 442 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 15:27:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-21 15:27:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 230. [2021-12-21 15:27:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 138 states have internal predecessors, (161), 73 states have call successors, (73), 21 states have call predecessors, (73), 20 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2021-12-21 15:27:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 304 transitions. [2021-12-21 15:27:47,018 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 304 transitions. Word has length 87 [2021-12-21 15:27:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:27:47,019 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 304 transitions. [2021-12-21 15:27:47,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 15:27:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 304 transitions. [2021-12-21 15:27:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-21 15:27:47,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:47,022 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:47,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:27:47,022 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:47,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash 672902535, now seen corresponding path program 1 times [2021-12-21 15:27:47,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:47,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322935914] [2021-12-21 15:27:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:47,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 15:27:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 15:27:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 15:27:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 15:27:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 15:27:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 15:27:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 15:27:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 15:27:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 15:27:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 15:27:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 15:27:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 15:27:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 15:27:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 15:27:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-21 15:27:47,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:27:47,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322935914] [2021-12-21 15:27:47,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322935914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:27:47,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245776003] [2021-12-21 15:27:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:47,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:47,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:27:47,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:27:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:47,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 15:27:47,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:27:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 15:27:47,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:27:47,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245776003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:27:47,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:27:47,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-21 15:27:47,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011550876] [2021-12-21 15:27:47,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:27:47,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:27:47,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:27:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:27:47,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:27:47,797 INFO L87 Difference]: Start difference. First operand 230 states and 304 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 15:27:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:27:47,984 INFO L93 Difference]: Finished difference Result 436 states and 585 transitions. [2021-12-21 15:27:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:27:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2021-12-21 15:27:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:27:47,986 INFO L225 Difference]: With dead ends: 436 [2021-12-21 15:27:47,986 INFO L226 Difference]: Without dead ends: 232 [2021-12-21 15:27:47,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:27:47,988 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 306 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 15:27:47,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 981 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 15:27:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-21 15:27:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-12-21 15:27:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 137 states have (on average 1.1824817518248176) internal successors, (162), 140 states have internal predecessors, (162), 73 states have call successors, (73), 21 states have call predecessors, (73), 21 states have return successors, (80), 70 states have call predecessors, (80), 70 states have call successors, (80) [2021-12-21 15:27:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 315 transitions. [2021-12-21 15:27:48,003 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 315 transitions. Word has length 87 [2021-12-21 15:27:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:27:48,004 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 315 transitions. [2021-12-21 15:27:48,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 15:27:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 315 transitions. [2021-12-21 15:27:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 15:27:48,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:48,005 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:48,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:27:48,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:48,220 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash -149436210, now seen corresponding path program 1 times [2021-12-21 15:27:48,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:48,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839150267] [2021-12-21 15:27:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:48,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:48,268 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 15:27:48,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739430908] [2021-12-21 15:27:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:48,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:48,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:48,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:27:48,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:27:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:48,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 15:27:48,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:27:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 15:27:48,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:27:48,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:27:48,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839150267] [2021-12-21 15:27:48,754 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 15:27:48,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739430908] [2021-12-21 15:27:48,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739430908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:27:48,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:27:48,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:27:48,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163493685] [2021-12-21 15:27:48,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:27:48,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:27:48,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:27:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:27:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:27:48,755 INFO L87 Difference]: Start difference. First operand 232 states and 315 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 15:27:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:27:48,785 INFO L93 Difference]: Finished difference Result 443 states and 614 transitions. [2021-12-21 15:27:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:27:48,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 102 [2021-12-21 15:27:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:27:48,790 INFO L225 Difference]: With dead ends: 443 [2021-12-21 15:27:48,790 INFO L226 Difference]: Without dead ends: 237 [2021-12-21 15:27:48,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:27:48,793 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 10 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:27:48,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 899 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:27:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-21 15:27:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2021-12-21 15:27:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 142 states have internal predecessors, (164), 73 states have call successors, (73), 21 states have call predecessors, (73), 21 states have return successors, (80), 70 states have call predecessors, (80), 70 states have call successors, (80) [2021-12-21 15:27:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 317 transitions. [2021-12-21 15:27:48,819 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 317 transitions. Word has length 102 [2021-12-21 15:27:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:27:48,819 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 317 transitions. [2021-12-21 15:27:48,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 15:27:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 317 transitions. [2021-12-21 15:27:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 15:27:48,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:48,826 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:48,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:27:49,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 15:27:49,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:49,048 INFO L85 PathProgramCache]: Analyzing trace with hash -710135988, now seen corresponding path program 1 times [2021-12-21 15:27:49,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:49,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115783796] [2021-12-21 15:27:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:49,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:49,097 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 15:27:49,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245167406] [2021-12-21 15:27:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:49,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:49,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:49,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:27:49,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:27:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:49,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 2384 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 15:27:49,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:27:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-21 15:27:49,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:27:49,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:27:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115783796] [2021-12-21 15:27:49,611 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 15:27:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245167406] [2021-12-21 15:27:49,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245167406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:27:49,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:27:49,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:27:49,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831316780] [2021-12-21 15:27:49,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:27:49,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:27:49,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:27:49,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:27:49,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:27:49,614 INFO L87 Difference]: Start difference. First operand 234 states and 317 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-21 15:27:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:27:49,941 INFO L93 Difference]: Finished difference Result 432 states and 583 transitions. [2021-12-21 15:27:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:27:49,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2021-12-21 15:27:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:27:49,943 INFO L225 Difference]: With dead ends: 432 [2021-12-21 15:27:49,943 INFO L226 Difference]: Without dead ends: 234 [2021-12-21 15:27:49,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:27:49,944 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 354 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 15:27:49,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1276 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 15:27:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-21 15:27:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-12-21 15:27:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 142 states have internal predecessors, (164), 73 states have call successors, (73), 21 states have call predecessors, (73), 21 states have return successors, (74), 70 states have call predecessors, (74), 70 states have call successors, (74) [2021-12-21 15:27:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 311 transitions. [2021-12-21 15:27:49,953 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 311 transitions. Word has length 102 [2021-12-21 15:27:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:27:49,954 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 311 transitions. [2021-12-21 15:27:49,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-21 15:27:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 311 transitions. [2021-12-21 15:27:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-21 15:27:49,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:49,955 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:49,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:27:50,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:50,168 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash 191134547, now seen corresponding path program 2 times [2021-12-21 15:27:50,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:50,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456228347] [2021-12-21 15:27:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:50,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:50,231 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 15:27:50,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559370639] [2021-12-21 15:27:50,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:27:50,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:50,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:50,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:27:50,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:27:50,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 15:27:50,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:27:50,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 15:27:50,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:27:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-21 15:27:50,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:27:50,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:27:50,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456228347] [2021-12-21 15:27:50,689 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 15:27:50,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559370639] [2021-12-21 15:27:50,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559370639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:27:50,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:27:50,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:27:50,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600768826] [2021-12-21 15:27:50,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:27:50,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:27:50,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:27:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:27:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:27:50,691 INFO L87 Difference]: Start difference. First operand 234 states and 311 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 15:27:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:27:50,712 INFO L93 Difference]: Finished difference Result 409 states and 535 transitions. [2021-12-21 15:27:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:27:50,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 117 [2021-12-21 15:27:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:27:50,714 INFO L225 Difference]: With dead ends: 409 [2021-12-21 15:27:50,714 INFO L226 Difference]: Without dead ends: 239 [2021-12-21 15:27:50,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:27:50,716 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 2 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 15:27:50,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1199 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 15:27:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-21 15:27:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-12-21 15:27:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 143 states have (on average 1.1748251748251748) internal successors, (168), 146 states have internal predecessors, (168), 73 states have call successors, (73), 21 states have call predecessors, (73), 22 states have return successors, (75), 71 states have call predecessors, (75), 70 states have call successors, (75) [2021-12-21 15:27:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 316 transitions. [2021-12-21 15:27:50,725 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 316 transitions. Word has length 117 [2021-12-21 15:27:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:27:50,726 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 316 transitions. [2021-12-21 15:27:50,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 15:27:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 316 transitions. [2021-12-21 15:27:50,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 15:27:50,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:50,727 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:50,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:27:50,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:50,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash 389087133, now seen corresponding path program 1 times [2021-12-21 15:27:50,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:50,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107610103] [2021-12-21 15:27:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:50,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:50,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 15:27:50,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119049914] [2021-12-21 15:27:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:50,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:50,978 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:27:50,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:27:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:51,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 2529 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 15:27:51,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:27:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 15:27:51,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:27:51,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:27:51,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107610103] [2021-12-21 15:27:51,513 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 15:27:51,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119049914] [2021-12-21 15:27:51,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119049914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:27:51,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:27:51,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 15:27:51,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775178515] [2021-12-21 15:27:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:27:51,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:27:51,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:27:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:27:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 15:27:51,515 INFO L87 Difference]: Start difference. First operand 239 states and 316 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-21 15:27:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 15:27:51,869 INFO L93 Difference]: Finished difference Result 439 states and 576 transitions. [2021-12-21 15:27:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:27:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 123 [2021-12-21 15:27:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 15:27:51,871 INFO L225 Difference]: With dead ends: 439 [2021-12-21 15:27:51,871 INFO L226 Difference]: Without dead ends: 237 [2021-12-21 15:27:51,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:27:51,872 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 392 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 15:27:51,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 1474 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 15:27:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-21 15:27:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-12-21 15:27:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 144 states have internal predecessors, (166), 73 states have call successors, (73), 21 states have call predecessors, (73), 21 states have return successors, (71), 71 states have call predecessors, (71), 70 states have call successors, (71) [2021-12-21 15:27:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 310 transitions. [2021-12-21 15:27:51,881 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 310 transitions. Word has length 123 [2021-12-21 15:27:51,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 15:27:51,881 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 310 transitions. [2021-12-21 15:27:51,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-12-21 15:27:51,881 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 310 transitions. [2021-12-21 15:27:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-21 15:27:51,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 15:27:51,882 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:27:51,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:27:52,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:52,102 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 15:27:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:27:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1195830657, now seen corresponding path program 1 times [2021-12-21 15:27:52,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:27:52,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549603116] [2021-12-21 15:27:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:52,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:27:52,139 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 15:27:52,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350481169] [2021-12-21 15:27:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:27:52,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:27:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:27:52,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:27:52,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:27:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:27:52,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 2811 conjuncts, 327 conjunts are in the unsatisfiable core [2021-12-21 15:27:52,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:27:52,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 15:27:53,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-21 15:27:53,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-21 15:27:53,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 15:27:53,648 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-21 15:27:53,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 37 [2021-12-21 15:27:53,885 INFO L353 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-21 15:27:53,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-21 15:28:05,142 INFO L353 Elim1Store]: treesize reduction 91, result has 30.0 percent of original size [2021-12-21 15:28:05,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 69 [2021-12-21 15:28:05,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-21 15:28:05,875 INFO L353 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-21 15:28:05,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-21 15:28:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:28:11,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 15:28:11,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:28:11,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-21 15:28:11,641 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-21 15:28:11,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 15:28:49,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 69 [2021-12-21 15:28:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 15:28:49,948 INFO L328 TraceCheckSpWp]: Computing backward predicates...