./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_priority_queue_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 b8e2b19500a9ff32f182f41fca1db48d6268985503aaacd0cb9efdaafa7d6419 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:07:51,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:07:51,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:07:51,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:07:51,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:07:51,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:07:51,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:07:51,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:07:51,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:07:51,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:07:51,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:07:51,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:07:51,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:07:51,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:07:51,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:07:51,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:07:51,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:07:51,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:07:51,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:07:51,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:07:51,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:07:51,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:07:51,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:07:51,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:07:51,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:07:51,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:07:51,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:07:51,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:07:51,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:07:51,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:07:51,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:07:51,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:07:51,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:07:51,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:07:51,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:07:51,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:07:51,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:07:51,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:07:51,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:07:51,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:07:51,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:07:51,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:07:51,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:07:51,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:07:51,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:07:51,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:07:51,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:07:51,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:07:51,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:07:51,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:07:51,945 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:07:51,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:07:51,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:07:51,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:07:51,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:07:51,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:07:51,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:07:51,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:07:51,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:07:51,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:07:51,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:07:51,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:07:51,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:07:51,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:07:51,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:07:51,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:07:51,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:07:51,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:07:51,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:07:51,949 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:07:51,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:07:51,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:07:51,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:07:51,949 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8e2b19500a9ff32f182f41fca1db48d6268985503aaacd0cb9efdaafa7d6419 [2021-12-14 17:07:52,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:07:52,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:07:52,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:07:52,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:07:52,116 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:07:52,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i [2021-12-14 17:07:52,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4feb7c82b/5eaf996f5e94423b9cab8953f2a5f5dd/FLAGfa6284deb [2021-12-14 17:07:52,684 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:07:52,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_capacity_harness.i [2021-12-14 17:07:52,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4feb7c82b/5eaf996f5e94423b9cab8953f2a5f5dd/FLAGfa6284deb [2021-12-14 17:07:53,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4feb7c82b/5eaf996f5e94423b9cab8953f2a5f5dd [2021-12-14 17:07:53,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:07:53,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:07:53,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:07:53,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:07:53,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:07:53,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:07:53" (1/1) ... [2021-12-14 17:07:53,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eca6255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:53, skipping insertion in model container [2021-12-14 17:07:53,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:07:53" (1/1) ... [2021-12-14 17:07:53,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:07:53,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:07:53,434 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_priority_queue_capacity_harness.i[4501,4514] [2021-12-14 17:07:53,438 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_priority_queue_capacity_harness.i[4561,4574] [2021-12-14 17:07:53,829 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:07:53,893 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:53,893 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:53,894 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:53,894 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:53,894 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:53,900 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:53,901 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:53,905 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:53,905 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,072 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:07:54,073 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:07:54,073 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:07:54,074 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:07:54,075 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:07:54,075 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:07:54,075 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:07:54,076 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:07:54,076 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:07:54,076 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:07:54,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,167 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:07:54,252 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:07:54,267 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_priority_queue_capacity_harness.i[4501,4514] [2021-12-14 17:07:54,270 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_priority_queue_capacity_harness.i[4561,4574] [2021-12-14 17:07:54,303 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:07:54,335 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,335 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,336 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,336 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,336 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,340 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,345 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,346 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,355 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,378 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:07:54,378 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:07:54,379 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:07:54,379 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:07:54,380 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:07:54,380 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:07:54,381 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:07:54,381 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:07:54,381 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:07:54,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:07:54,427 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:07:54,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:07:54,583 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:07:54,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54 WrapperNode [2021-12-14 17:07:54,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:07:54,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:07:54,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:07:54,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:07:54,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,707 INFO L137 Inliner]: procedures = 689, calls = 1536, calls flagged for inlining = 55, calls inlined = 11, statements flattened = 692 [2021-12-14 17:07:54,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:07:54,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:07:54,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:07:54,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:07:54,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:07:54,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:07:54,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:07:54,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:07:54,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (1/1) ... [2021-12-14 17:07:54,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:07:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:54,812 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) [2021-12-14 17:07:54,827 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 [2021-12-14 17:07:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-14 17:07:54,837 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-14 17:07:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:07:54,837 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-14 17:07:54,837 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-14 17:07:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-14 17:07:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-14 17:07:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-14 17:07:54,839 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-14 17:07:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:07:54,840 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-14 17:07:54,840 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-14 17:07:54,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:07:54,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:07:54,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:07:54,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:07:54,841 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-14 17:07:54,841 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-14 17:07:54,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:07:54,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:07:54,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:07:54,842 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-14 17:07:54,842 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-14 17:07:54,842 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-14 17:07:54,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-14 17:07:54,842 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-14 17:07:54,843 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-14 17:07:54,843 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-12-14 17:07:54,843 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-12-14 17:07:54,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:07:54,844 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:07:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:07:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:07:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:07:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-14 17:07:54,844 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-14 17:07:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-14 17:07:54,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-14 17:07:54,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:07:54,845 INFO L130 BoogieDeclarations]: Found specification of procedure assert_array_list_equivalence [2021-12-14 17:07:54,845 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_array_list_equivalence [2021-12-14 17:07:54,845 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-12-14 17:07:54,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-12-14 17:07:54,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:07:55,041 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:07:55,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:07:55,563 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:07:55,571 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:07:55,572 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 17:07:55,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:07:55 BoogieIcfgContainer [2021-12-14 17:07:55,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:07:55,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:07:55,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:07:55,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:07:55,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:07:53" (1/3) ... [2021-12-14 17:07:55,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9e09ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:07:55, skipping insertion in model container [2021-12-14 17:07:55,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:07:54" (2/3) ... [2021-12-14 17:07:55,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9e09ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:07:55, skipping insertion in model container [2021-12-14 17:07:55,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:07:55" (3/3) ... [2021-12-14 17:07:55,579 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_capacity_harness.i [2021-12-14 17:07:55,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:07:55,583 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:07:55,624 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:07:55,639 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 [2021-12-14 17:07:55,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:07:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 112 states have (on average 1.2232142857142858) internal successors, (137), 113 states have internal predecessors, (137), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-14 17:07:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 17:07:55,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:55,668 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:55,669 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:55,673 INFO L85 PathProgramCache]: Analyzing trace with hash -626335346, now seen corresponding path program 1 times [2021-12-14 17:07:55,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:55,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470164329] [2021-12-14 17:07:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:55,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:07:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:07:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:07:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:07:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 17:07:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:07:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:07:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:07:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:07:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:07:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:07:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:07:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:07:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:07:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:07:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 17:07:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-14 17:07:56,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:56,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470164329] [2021-12-14 17:07:56,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470164329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:56,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:56,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:07:56,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308529852] [2021-12-14 17:07:56,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:56,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:07:56,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:07:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:07:56,422 INFO L87 Difference]: Start difference. First operand has 170 states, 112 states have (on average 1.2232142857142858) internal successors, (137), 113 states have internal predecessors, (137), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 17:07:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:56,767 INFO L93 Difference]: Finished difference Result 383 states and 537 transitions. [2021-12-14 17:07:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:07:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 110 [2021-12-14 17:07:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:56,783 INFO L225 Difference]: With dead ends: 383 [2021-12-14 17:07:56,783 INFO L226 Difference]: Without dead ends: 219 [2021-12-14 17:07:56,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:07:56,795 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 200 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:56,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 330 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 17:07:56,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-14 17:07:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 165. [2021-12-14 17:07:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 109 states have internal predecessors, (130), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-14 17:07:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 209 transitions. [2021-12-14 17:07:56,848 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 209 transitions. Word has length 110 [2021-12-14 17:07:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:56,849 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 209 transitions. [2021-12-14 17:07:56,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 17:07:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 209 transitions. [2021-12-14 17:07:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 17:07:56,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:56,858 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:56,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:07:56,858 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:56,859 INFO L85 PathProgramCache]: Analyzing trace with hash 726994572, now seen corresponding path program 1 times [2021-12-14 17:07:56,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:56,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322902377] [2021-12-14 17:07:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:56,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:07:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:07:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:07:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:07:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 17:07:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:07:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:07:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:07:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:07:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:07:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:07:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:07:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:07:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:07:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 17:07:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 17:07:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-14 17:07:57,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:57,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322902377] [2021-12-14 17:07:57,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322902377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:57,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:57,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:07:57,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759706646] [2021-12-14 17:07:57,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:57,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:07:57,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:07:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:07:57,219 INFO L87 Difference]: Start difference. First operand 165 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-14 17:07:57,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:57,752 INFO L93 Difference]: Finished difference Result 342 states and 453 transitions. [2021-12-14 17:07:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:07:57,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 110 [2021-12-14 17:07:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:57,754 INFO L225 Difference]: With dead ends: 342 [2021-12-14 17:07:57,755 INFO L226 Difference]: Without dead ends: 219 [2021-12-14 17:07:57,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:07:57,756 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 326 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:57,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 609 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:07:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-14 17:07:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 165. [2021-12-14 17:07:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 109 states have internal predecessors, (129), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-14 17:07:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 208 transitions. [2021-12-14 17:07:57,780 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 208 transitions. Word has length 110 [2021-12-14 17:07:57,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:57,781 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 208 transitions. [2021-12-14 17:07:57,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-14 17:07:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 208 transitions. [2021-12-14 17:07:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-14 17:07:57,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:57,782 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 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] [2021-12-14 17:07:57,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:07:57,783 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:57,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash 691144694, now seen corresponding path program 1 times [2021-12-14 17:07:57,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:57,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058013775] [2021-12-14 17:07:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:57,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 17:07:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:57,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 17:07:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:07:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:07:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 17:07:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:07:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 17:07:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 17:07:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:07:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:07:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:07:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:07:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:07:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:07:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:07:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:07:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-14 17:07:58,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:58,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058013775] [2021-12-14 17:07:58,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058013775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:58,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651891201] [2021-12-14 17:07:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:58,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:58,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:58,220 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) [2021-12-14 17:07:58,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:07:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 2338 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 17:07:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-14 17:07:58,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:58,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651891201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:58,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:58,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-12-14 17:07:58,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407957907] [2021-12-14 17:07:58,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:58,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:07:58,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:07:58,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:07:58,828 INFO L87 Difference]: Start difference. First operand 165 states and 208 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-14 17:07:58,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:58,923 INFO L93 Difference]: Finished difference Result 307 states and 396 transitions. [2021-12-14 17:07:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:07:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 118 [2021-12-14 17:07:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:58,925 INFO L225 Difference]: With dead ends: 307 [2021-12-14 17:07:58,925 INFO L226 Difference]: Without dead ends: 167 [2021-12-14 17:07:58,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:07:58,926 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 70 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:58,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1126 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-14 17:07:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-12-14 17:07:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 111 states have internal predecessors, (130), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-14 17:07:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 212 transitions. [2021-12-14 17:07:58,936 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 212 transitions. Word has length 118 [2021-12-14 17:07:58,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:58,937 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 212 transitions. [2021-12-14 17:07:58,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-14 17:07:58,937 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 212 transitions. [2021-12-14 17:07:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-14 17:07:58,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:58,938 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:58,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:59,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:59,158 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:59,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1403025034, now seen corresponding path program 1 times [2021-12-14 17:07:59,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:59,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432496608] [2021-12-14 17:07:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:59,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:59,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:07:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900209136] [2021-12-14 17:07:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:59,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:59,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:59,243 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) [2021-12-14 17:07:59,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:07:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 2474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:07:59,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-14 17:07:59,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:59,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:59,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432496608] [2021-12-14 17:07:59,994 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:07:59,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900209136] [2021-12-14 17:07:59,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900209136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:59,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:59,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:07:59,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157193482] [2021-12-14 17:07:59,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:59,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:07:59,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:07:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:07:59,998 INFO L87 Difference]: Start difference. First operand 167 states and 212 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-14 17:08:00,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:00,028 INFO L93 Difference]: Finished difference Result 295 states and 383 transitions. [2021-12-14 17:08:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:08:00,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 133 [2021-12-14 17:08:00,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:00,034 INFO L225 Difference]: With dead ends: 295 [2021-12-14 17:08:00,034 INFO L226 Difference]: Without dead ends: 172 [2021-12-14 17:08:00,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:08:00,037 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 10 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 611 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 [2021-12-14 17:08:00,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 611 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:08:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-14 17:08:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2021-12-14 17:08:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 113 states have internal predecessors, (132), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-14 17:08:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2021-12-14 17:08:00,064 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 133 [2021-12-14 17:08:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:00,065 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2021-12-14 17:08:00,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-14 17:08:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2021-12-14 17:08:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-14 17:08:00,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:00,069 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:08:00,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:00,302 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,SelfDestructingSolverStorable3 [2021-12-14 17:08:00,302 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:00,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash -558549624, now seen corresponding path program 1 times [2021-12-14 17:08:00,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:00,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470108457] [2021-12-14 17:08:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:00,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:00,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:00,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846467583] [2021-12-14 17:08:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:00,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:00,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:00,364 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) [2021-12-14 17:08:00,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:08:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 17:08:00,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-14 17:08:00,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:08:00,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:00,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470108457] [2021-12-14 17:08:00,923 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:00,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846467583] [2021-12-14 17:08:00,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846467583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:08:00,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:08:00,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:08:00,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363909181] [2021-12-14 17:08:00,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:08:00,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:08:00,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:08:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:08:00,929 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-14 17:08:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:01,068 INFO L93 Difference]: Finished difference Result 297 states and 378 transitions. [2021-12-14 17:08:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:08:01,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 133 [2021-12-14 17:08:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:01,072 INFO L225 Difference]: With dead ends: 297 [2021-12-14 17:08:01,072 INFO L226 Difference]: Without dead ends: 169 [2021-12-14 17:08:01,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:08:01,073 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 242 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:01,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 787 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:08:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-14 17:08:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-14 17:08:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 113 states have internal predecessors, (131), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-14 17:08:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 213 transitions. [2021-12-14 17:08:01,085 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 213 transitions. Word has length 133 [2021-12-14 17:08:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:01,085 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 213 transitions. [2021-12-14 17:08:01,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-14 17:08:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 213 transitions. [2021-12-14 17:08:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-14 17:08:01,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:01,087 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:08:01,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:01,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:01,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:01,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1813374097, now seen corresponding path program 1 times [2021-12-14 17:08:01,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:01,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82613980] [2021-12-14 17:08:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:01,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:01,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:01,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390690449] [2021-12-14 17:08:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:01,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:01,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:01,353 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) [2021-12-14 17:08:01,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:08:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:01,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:08:01,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:08:01,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:08:01,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82613980] [2021-12-14 17:08:01,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:01,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390690449] [2021-12-14 17:08:01,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390690449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:08:01,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:08:01,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:08:01,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420437867] [2021-12-14 17:08:01,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:08:01,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:08:01,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:08:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:08:01,961 INFO L87 Difference]: Start difference. First operand 169 states and 213 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-14 17:08:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:02,086 INFO L93 Difference]: Finished difference Result 310 states and 395 transitions. [2021-12-14 17:08:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:08:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 149 [2021-12-14 17:08:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:02,088 INFO L225 Difference]: With dead ends: 310 [2021-12-14 17:08:02,088 INFO L226 Difference]: Without dead ends: 169 [2021-12-14 17:08:02,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:08:02,090 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 109 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:02,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 1179 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:08:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-14 17:08:02,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-14 17:08:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 113 states have internal predecessors, (131), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2021-12-14 17:08:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 212 transitions. [2021-12-14 17:08:02,100 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 212 transitions. Word has length 149 [2021-12-14 17:08:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:02,101 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 212 transitions. [2021-12-14 17:08:02,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-14 17:08:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 212 transitions. [2021-12-14 17:08:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-14 17:08:02,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:02,103 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:08:02,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:02,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:02,323 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash 770964543, now seen corresponding path program 2 times [2021-12-14 17:08:02,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:02,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218475663] [2021-12-14 17:08:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:02,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:02,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:02,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333549082] [2021-12-14 17:08:02,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:08:02,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:02,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:02,369 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) [2021-12-14 17:08:02,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:08:03,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:08:03,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:08:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:08:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-14 17:08:03,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:08:03,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:03,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218475663] [2021-12-14 17:08:03,268 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:03,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333549082] [2021-12-14 17:08:03,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333549082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:08:03,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:08:03,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:08:03,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219771812] [2021-12-14 17:08:03,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:08:03,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:08:03,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:03,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:08:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:08:03,270 INFO L87 Difference]: Start difference. First operand 169 states and 212 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 17:08:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:03,349 INFO L93 Difference]: Finished difference Result 276 states and 344 transitions. [2021-12-14 17:08:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:08:03,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 3 states have call successors, (20) Word has length 164 [2021-12-14 17:08:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:03,350 INFO L225 Difference]: With dead ends: 276 [2021-12-14 17:08:03,350 INFO L226 Difference]: Without dead ends: 167 [2021-12-14 17:08:03,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:08:03,351 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 27 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:03,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 887 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:08:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-14 17:08:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-12-14 17:08:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 111 states have internal predecessors, (129), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-14 17:08:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 208 transitions. [2021-12-14 17:08:03,357 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 208 transitions. Word has length 164 [2021-12-14 17:08:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:03,357 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 208 transitions. [2021-12-14 17:08:03,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-14 17:08:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 208 transitions. [2021-12-14 17:08:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-14 17:08:03,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:03,359 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-12-14 17:08:03,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:03,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:03,560 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash -534191969, now seen corresponding path program 1 times [2021-12-14 17:08:03,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:03,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475636562] [2021-12-14 17:08:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:03,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:03,609 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:03,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190986556] [2021-12-14 17:08:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:03,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:03,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:03,624 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) [2021-12-14 17:08:03,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:08:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:04,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 2974 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 17:08:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:08:04,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:08:04,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:04,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475636562] [2021-12-14 17:08:04,445 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:04,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190986556] [2021-12-14 17:08:04,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190986556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:08:04,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:08:04,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:08:04,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301215891] [2021-12-14 17:08:04,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:08:04,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:08:04,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:04,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:08:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:08:04,447 INFO L87 Difference]: Start difference. First operand 167 states and 208 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:04,638 INFO L93 Difference]: Finished difference Result 308 states and 389 transitions. [2021-12-14 17:08:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:08:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 194 [2021-12-14 17:08:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:04,640 INFO L225 Difference]: With dead ends: 308 [2021-12-14 17:08:04,640 INFO L226 Difference]: Without dead ends: 185 [2021-12-14 17:08:04,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:08:04,641 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 21 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:04,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 893 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:08:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-14 17:08:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2021-12-14 17:08:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 115 states have internal predecessors, (134), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-14 17:08:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2021-12-14 17:08:04,647 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 194 [2021-12-14 17:08:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:04,647 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2021-12-14 17:08:04,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2021-12-14 17:08:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-14 17:08:04,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:04,649 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-12-14 17:08:04,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:04,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:04,870 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1304925535, now seen corresponding path program 1 times [2021-12-14 17:08:04,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:04,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633505591] [2021-12-14 17:08:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:04,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:04,910 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:04,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808110313] [2021-12-14 17:08:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:04,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:04,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:04,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:08:04,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:08:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:05,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:08:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:08:05,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:08:05,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:05,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633505591] [2021-12-14 17:08:05,576 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:05,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808110313] [2021-12-14 17:08:05,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808110313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:08:05,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:08:05,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:08:05,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734320807] [2021-12-14 17:08:05,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:08:05,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:08:05,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:08:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:08:05,578 INFO L87 Difference]: Start difference. First operand 171 states and 213 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:05,600 INFO L93 Difference]: Finished difference Result 302 states and 379 transitions. [2021-12-14 17:08:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:08:05,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 194 [2021-12-14 17:08:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:05,601 INFO L225 Difference]: With dead ends: 302 [2021-12-14 17:08:05,601 INFO L226 Difference]: Without dead ends: 175 [2021-12-14 17:08:05,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:08:05,602 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 3 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 604 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 [2021-12-14 17:08:05,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 604 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:08:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-14 17:08:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2021-12-14 17:08:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 117 states have internal predecessors, (136), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-14 17:08:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-12-14 17:08:05,609 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 194 [2021-12-14 17:08:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:05,609 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-12-14 17:08:05,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-12-14 17:08:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-14 17:08:05,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:05,611 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-12-14 17:08:05,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:05,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:05,831 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:05,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1891201757, now seen corresponding path program 1 times [2021-12-14 17:08:05,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:05,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105534806] [2021-12-14 17:08:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:05,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:05,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:05,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82664559] [2021-12-14 17:08:05,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:05,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:05,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:05,889 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:08:05,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:08:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 2966 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 17:08:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:06,640 INFO L388 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 11 treesize of output 5 [2021-12-14 17:08:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 17:08:06,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:08:06,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:06,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105534806] [2021-12-14 17:08:06,741 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:06,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82664559] [2021-12-14 17:08:06,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82664559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:08:06,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:08:06,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:08:06,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719513989] [2021-12-14 17:08:06,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:08:06,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:08:06,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:08:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:08:06,743 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-12-14 17:08:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:07,041 INFO L93 Difference]: Finished difference Result 327 states and 415 transitions. [2021-12-14 17:08:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:08:07,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 194 [2021-12-14 17:08:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:07,042 INFO L225 Difference]: With dead ends: 327 [2021-12-14 17:08:07,042 INFO L226 Difference]: Without dead ends: 196 [2021-12-14 17:08:07,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:08:07,043 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 111 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:07,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1471 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:08:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-14 17:08:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 186. [2021-12-14 17:08:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 128 states have (on average 1.1796875) internal successors, (151), 129 states have internal predecessors, (151), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2021-12-14 17:08:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 234 transitions. [2021-12-14 17:08:07,050 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 234 transitions. Word has length 194 [2021-12-14 17:08:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:07,051 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 234 transitions. [2021-12-14 17:08:07,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 6 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2021-12-14 17:08:07,051 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 234 transitions. [2021-12-14 17:08:07,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-14 17:08:07,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:07,052 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-12-14 17:08:07,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:07,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 17:08:07,267 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1820193313, now seen corresponding path program 1 times [2021-12-14 17:08:07,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763819778] [2021-12-14 17:08:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:07,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:07,357 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:07,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033957361] [2021-12-14 17:08:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:07,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:07,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:08:07,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:08:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:07,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 17:08:07,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:08:08,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:08:08,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:08,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763819778] [2021-12-14 17:08:08,115 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:08,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033957361] [2021-12-14 17:08:08,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033957361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:08:08,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:08:08,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:08:08,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964510204] [2021-12-14 17:08:08,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:08:08,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:08:08,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:08:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:08:08,116 INFO L87 Difference]: Start difference. First operand 186 states and 234 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:08,152 INFO L93 Difference]: Finished difference Result 344 states and 437 transitions. [2021-12-14 17:08:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:08:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 194 [2021-12-14 17:08:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:08,155 INFO L225 Difference]: With dead ends: 344 [2021-12-14 17:08:08,156 INFO L226 Difference]: Without dead ends: 202 [2021-12-14 17:08:08,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:08:08,157 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 9 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:08,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 826 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:08:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-14 17:08:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-12-14 17:08:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 138 states have (on average 1.181159420289855) internal successors, (163), 139 states have internal predecessors, (163), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2021-12-14 17:08:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 246 transitions. [2021-12-14 17:08:08,183 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 246 transitions. Word has length 194 [2021-12-14 17:08:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:08,183 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 246 transitions. [2021-12-14 17:08:08,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 246 transitions. [2021-12-14 17:08:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-14 17:08:08,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:08,185 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-12-14 17:08:08,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:08,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:08,386 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:08,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1417700959, now seen corresponding path program 1 times [2021-12-14 17:08:08,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:08,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502081675] [2021-12-14 17:08:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:08,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:08,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:08,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009728363] [2021-12-14 17:08:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:08,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:08,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:08,431 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:08:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:08:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:08,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:08:08,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:08:09,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:08:09,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:09,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502081675] [2021-12-14 17:08:09,208 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:09,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009728363] [2021-12-14 17:08:09,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009728363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:08:09,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:08:09,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:08:09,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007131650] [2021-12-14 17:08:09,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:08:09,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:08:09,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:09,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:08:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:08:09,210 INFO L87 Difference]: Start difference. First operand 196 states and 246 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:09,233 INFO L93 Difference]: Finished difference Result 344 states and 434 transitions. [2021-12-14 17:08:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:08:09,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 194 [2021-12-14 17:08:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:09,244 INFO L225 Difference]: With dead ends: 344 [2021-12-14 17:08:09,244 INFO L226 Difference]: Without dead ends: 192 [2021-12-14 17:08:09,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:08:09,245 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 2 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:09,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 606 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:08:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-14 17:08:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2021-12-14 17:08:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 131 states have internal predecessors, (151), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2021-12-14 17:08:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 234 transitions. [2021-12-14 17:08:09,260 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 234 transitions. Word has length 194 [2021-12-14 17:08:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:09,263 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 234 transitions. [2021-12-14 17:08:09,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 234 transitions. [2021-12-14 17:08:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-14 17:08:09,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:09,264 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1] [2021-12-14 17:08:09,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:09,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 17:08:09,485 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash 904679995, now seen corresponding path program 1 times [2021-12-14 17:08:09,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:09,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755365581] [2021-12-14 17:08:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:09,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:09,528 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:09,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639590578] [2021-12-14 17:08:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:09,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:09,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:09,534 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:08:09,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:08:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 2966 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:08:10,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:08:10,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:08:10,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:10,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755365581] [2021-12-14 17:08:10,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:10,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639590578] [2021-12-14 17:08:10,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639590578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:08:10,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:08:10,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:08:10,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903088816] [2021-12-14 17:08:10,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:08:10,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:08:10,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:08:10,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:08:10,317 INFO L87 Difference]: Start difference. First operand 188 states and 234 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:10,448 INFO L93 Difference]: Finished difference Result 332 states and 420 transitions. [2021-12-14 17:08:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:08:10,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 196 [2021-12-14 17:08:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:10,449 INFO L225 Difference]: With dead ends: 332 [2021-12-14 17:08:10,449 INFO L226 Difference]: Without dead ends: 188 [2021-12-14 17:08:10,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:08:10,450 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:10,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 751 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:08:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-14 17:08:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-12-14 17:08:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 131 states have internal predecessors, (150), 40 states have call successors, (40), 16 states have call predecessors, (40), 17 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2021-12-14 17:08:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 233 transitions. [2021-12-14 17:08:10,456 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 233 transitions. Word has length 196 [2021-12-14 17:08:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:10,457 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 233 transitions. [2021-12-14 17:08:10,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:08:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 233 transitions. [2021-12-14 17:08:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-14 17:08:10,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:10,458 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1] [2021-12-14 17:08:10,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:10,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 17:08:10,658 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:10,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1935720893, now seen corresponding path program 1 times [2021-12-14 17:08:10,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:10,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849945116] [2021-12-14 17:08:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:10,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:10,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:10,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138277004] [2021-12-14 17:08:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:10,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:10,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:10,701 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:08:10,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:08:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:11,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-14 17:08:11,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:16,857 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-14 17:08:16,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2021-12-14 17:08:16,865 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-14 17:08:16,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-12-14 17:08:16,870 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-14 17:08:16,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-12-14 17:08:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 149 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-14 17:08:17,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:08:17,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:17,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849945116] [2021-12-14 17:08:17,773 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:17,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138277004] [2021-12-14 17:08:17,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138277004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:08:17,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:08:17,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-14 17:08:17,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102669440] [2021-12-14 17:08:17,773 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 17:08:17,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 17:08:17,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 17:08:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=898, Unknown=1, NotChecked=0, Total=992 [2021-12-14 17:08:17,774 INFO L87 Difference]: Start difference. First operand 188 states and 233 transitions. Second operand has 23 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 8 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-12-14 17:08:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:29,163 INFO L93 Difference]: Finished difference Result 414 states and 524 transitions. [2021-12-14 17:08:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-14 17:08:29,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 8 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 196 [2021-12-14 17:08:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:29,166 INFO L225 Difference]: With dead ends: 414 [2021-12-14 17:08:29,166 INFO L226 Difference]: Without dead ends: 284 [2021-12-14 17:08:29,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=360, Invalid=3296, Unknown=4, NotChecked=0, Total=3660 [2021-12-14 17:08:29,168 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 240 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 3155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:29,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 1430 Invalid, 3155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2820 Invalid, 0 Unknown, 247 Unchecked, 1.8s Time] [2021-12-14 17:08:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-14 17:08:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 215. [2021-12-14 17:08:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 152 states have internal predecessors, (171), 45 states have call successors, (45), 17 states have call predecessors, (45), 20 states have return successors, (53), 45 states have call predecessors, (53), 44 states have call successors, (53) [2021-12-14 17:08:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 269 transitions. [2021-12-14 17:08:29,181 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 269 transitions. Word has length 196 [2021-12-14 17:08:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:29,181 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 269 transitions. [2021-12-14 17:08:29,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 8 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-12-14 17:08:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 269 transitions. [2021-12-14 17:08:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-14 17:08:29,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:29,182 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:08:29,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:29,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 17:08:29,403 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:29,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1509739381, now seen corresponding path program 1 times [2021-12-14 17:08:29,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:29,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176628383] [2021-12-14 17:08:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:29,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:29,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:29,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771690801] [2021-12-14 17:08:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:29,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:29,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:29,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:08:29,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 17:08:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:30,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 3016 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-14 17:08:30,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:30,058 INFO L388 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 [2021-12-14 17:08:30,418 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-14 17:08:30,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 17:08:32,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:08:32,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 17:08:34,621 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2056 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2056))) is different from true [2021-12-14 17:08:36,835 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (and (exists ((v_ArrVal_2058 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| v_ArrVal_2058)))) (<= |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| |c_aws_mul_size_checked_#in~r#1.offset|))) is different from true [2021-12-14 17:08:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:08:45,427 INFO L354 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2021-12-14 17:08:45,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 1 [2021-12-14 17:08:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 151 proven. 20 refuted. 0 times theorem prover too weak. 71 trivial. 3 not checked. [2021-12-14 17:08:45,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:08:46,389 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_aws_priority_queue_capacity_harness_~#old_backpointers~0#1.offset_8| Int) (|v_ULTIMATE.start_aws_priority_queue_capacity_harness_~#old_backpointers~0#1.base_8| Int)) (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_aws_priority_queue_capacity_harness_~#queue~0#1.base|) (+ 56 |c_ULTIMATE.start_aws_priority_queue_capacity_harness_~#queue~0#1.offset|)) (select (select |c_#memory_int| |v_ULTIMATE.start_aws_priority_queue_capacity_harness_~#old_backpointers~0#1.base_8|) (+ |v_ULTIMATE.start_aws_priority_queue_capacity_harness_~#old_backpointers~0#1.offset_8| 8))))) is different from false [2021-12-14 17:08:46,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:46,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176628383] [2021-12-14 17:08:46,399 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:46,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771690801] [2021-12-14 17:08:46,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771690801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:08:46,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:08:46,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-14 17:08:46,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100046060] [2021-12-14 17:08:46,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 17:08:46,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 17:08:46,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:46,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 17:08:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=775, Unknown=13, NotChecked=174, Total=1056 [2021-12-14 17:08:46,401 INFO L87 Difference]: Start difference. First operand 215 states and 269 transitions. Second operand has 32 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 28 states have internal predecessors, (112), 12 states have call successors, (28), 7 states have call predecessors, (28), 11 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-14 17:08:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:54,191 INFO L93 Difference]: Finished difference Result 466 states and 589 transitions. [2021-12-14 17:08:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 17:08:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 28 states have internal predecessors, (112), 12 states have call successors, (28), 7 states have call predecessors, (28), 11 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 203 [2021-12-14 17:08:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:54,192 INFO L225 Difference]: With dead ends: 466 [2021-12-14 17:08:54,193 INFO L226 Difference]: Without dead ends: 300 [2021-12-14 17:08:54,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 235 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=151, Invalid=1392, Unknown=29, NotChecked=234, Total=1806 [2021-12-14 17:08:54,194 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 272 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 3228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1971 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:54,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 1153 Invalid, 3228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1087 Invalid, 0 Unknown, 1971 Unchecked, 0.8s Time] [2021-12-14 17:08:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-14 17:08:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 271. [2021-12-14 17:08:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 193 states have (on average 1.145077720207254) internal successors, (221), 198 states have internal predecessors, (221), 49 states have call successors, (49), 21 states have call predecessors, (49), 28 states have return successors, (74), 51 states have call predecessors, (74), 48 states have call successors, (74) [2021-12-14 17:08:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 344 transitions. [2021-12-14 17:08:54,231 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 344 transitions. Word has length 203 [2021-12-14 17:08:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:54,232 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 344 transitions. [2021-12-14 17:08:54,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 28 states have internal predecessors, (112), 12 states have call successors, (28), 7 states have call predecessors, (28), 11 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-12-14 17:08:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 344 transitions. [2021-12-14 17:08:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-14 17:08:54,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:54,233 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:08:54,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:54,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 17:08:54,447 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:54,448 INFO L85 PathProgramCache]: Analyzing trace with hash 371606800, now seen corresponding path program 1 times [2021-12-14 17:08:54,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:54,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991940211] [2021-12-14 17:08:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:54,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:54,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:54,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554124919] [2021-12-14 17:08:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:54,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:54,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:54,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:08:54,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 17:08:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:08:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 3063 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-14 17:08:55,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:55,104 INFO L388 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 21 treesize of output 9 [2021-12-14 17:08:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 109 proven. 12 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-14 17:08:55,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:08:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 17:08:56,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:08:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991940211] [2021-12-14 17:08:56,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 17:08:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554124919] [2021-12-14 17:08:56,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554124919] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:08:56,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:08:56,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 26 [2021-12-14 17:08:56,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109476196] [2021-12-14 17:08:56,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:08:56,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 17:08:56,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:08:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 17:08:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-12-14 17:08:56,259 INFO L87 Difference]: Start difference. First operand 271 states and 344 transitions. Second operand has 26 states, 21 states have (on average 6.428571428571429) internal successors, (135), 19 states have internal predecessors, (135), 7 states have call successors, (34), 3 states have call predecessors, (34), 8 states have return successors, (36), 9 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-14 17:08:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:08:56,860 INFO L93 Difference]: Finished difference Result 469 states and 601 transitions. [2021-12-14 17:08:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 17:08:56,860 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 6.428571428571429) internal successors, (135), 19 states have internal predecessors, (135), 7 states have call successors, (34), 3 states have call predecessors, (34), 8 states have return successors, (36), 9 states have call predecessors, (36), 6 states have call successors, (36) Word has length 221 [2021-12-14 17:08:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:08:56,862 INFO L225 Difference]: With dead ends: 469 [2021-12-14 17:08:56,862 INFO L226 Difference]: Without dead ends: 294 [2021-12-14 17:08:56,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-12-14 17:08:56,863 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 31 mSDsluCounter, 4260 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 4461 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:08:56,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 4461 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 17:08:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-14 17:08:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 278. [2021-12-14 17:08:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 199 states have (on average 1.150753768844221) internal successors, (229), 205 states have internal predecessors, (229), 49 states have call successors, (49), 21 states have call predecessors, (49), 29 states have return successors, (77), 51 states have call predecessors, (77), 48 states have call successors, (77) [2021-12-14 17:08:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 355 transitions. [2021-12-14 17:08:56,872 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 355 transitions. Word has length 221 [2021-12-14 17:08:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:08:56,872 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 355 transitions. [2021-12-14 17:08:56,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 6.428571428571429) internal successors, (135), 19 states have internal predecessors, (135), 7 states have call successors, (34), 3 states have call predecessors, (34), 8 states have return successors, (36), 9 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-14 17:08:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 355 transitions. [2021-12-14 17:08:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-14 17:08:56,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:08:56,874 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:08:56,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 17:08:57,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:57,087 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:08:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:08:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1725283338, now seen corresponding path program 2 times [2021-12-14 17:08:57,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:08:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290697111] [2021-12-14 17:08:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:08:57,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:08:57,134 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 17:08:57,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106694315] [2021-12-14 17:08:57,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:08:57,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:08:57,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:08:57,135 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:08:57,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 17:08:58,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:08:58,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:08:58,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 188 conjunts are in the unsatisfiable core [2021-12-14 17:08:58,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:08:58,186 INFO L388 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 [2021-12-14 17:09:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:09:00,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24