./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:29:07,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:29:07,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:29:07,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:29:07,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:29:07,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:29:07,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:29:07,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:29:07,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:29:07,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:29:07,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:29:07,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:29:07,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:29:07,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:29:07,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:29:07,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:29:07,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:29:07,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:29:07,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:29:07,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:29:07,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:29:07,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:29:07,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:29:07,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:29:07,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:29:07,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:29:07,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:29:07,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:29:07,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:29:07,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:29:07,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:29:07,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:29:07,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:29:07,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:29:07,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:29:07,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:29:07,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:29:07,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:29:07,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:29:07,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:29:07,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:29:07,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-17 23:29:07,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:29:07,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:29:07,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:29:07,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:29:07,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:29:07,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:29:07,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:29:07,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:29:07,634 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:29:07,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:29:07,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:29:07,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:29:07,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:29:07,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:29:07,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:29:07,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:29:07,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:29:07,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:29:07,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:29:07,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:29:07,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:29:07,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:29:07,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:29:07,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:29:07,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:29:07,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:29:07,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:29:07,638 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:29:07,638 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:29:07,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:29:07,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:29:07,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2021-12-17 23:29:07,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:29:07,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:29:07,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:29:07,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:29:07,841 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:29:07,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-12-17 23:29:07,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5309bc010/7e7124034bd840759e4ebd7f66378360/FLAG7ba704790 [2021-12-17 23:29:08,393 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:29:08,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-12-17 23:29:08,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5309bc010/7e7124034bd840759e4ebd7f66378360/FLAG7ba704790 [2021-12-17 23:29:08,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5309bc010/7e7124034bd840759e4ebd7f66378360 [2021-12-17 23:29:08,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:29:08,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:29:08,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:29:08,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:29:08,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:29:08,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:29:08" (1/1) ... [2021-12-17 23:29:08,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3dd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:08, skipping insertion in model container [2021-12-17 23:29:08,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:29:08" (1/1) ... [2021-12-17 23:29:08,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:29:09,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:29:09,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-17 23:29:09,254 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-17 23:29:09,656 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:29:09,708 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,708 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,710 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,717 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,718 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,719 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,720 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,721 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,721 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,721 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,722 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,878 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:29:09,879 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:29:09,880 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:29:09,881 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:29:09,882 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:29:09,882 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:29:09,882 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:29:09,883 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:29:09,884 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:29:09,884 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:29:09,962 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:09,973 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:29:10,046 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:29:10,054 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-17 23:29:10,054 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-17 23:29:10,072 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:29:10,100 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,101 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,101 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,102 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,102 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,106 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,106 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,107 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,107 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,108 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,108 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,108 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,109 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,137 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:29:10,138 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:29:10,138 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:29:10,139 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:29:10,139 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:29:10,140 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:29:10,140 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:29:10,140 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:29:10,140 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:29:10,140 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:29:10,155 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,161 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:29:10,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:29:10,310 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:29:10,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10 WrapperNode [2021-12-17 23:29:10,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:29:10,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:29:10,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:29:10,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:29:10,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,466 INFO L137 Inliner]: procedures = 690, calls = 1553, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 577 [2021-12-17 23:29:10,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:29:10,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:29:10,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:29:10,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:29:10,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:29:10,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:29:10,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:29:10,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:29:10,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (1/1) ... [2021-12-17 23:29:10,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:29:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:10,597 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) [2021-12-17 23:29:10,644 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 [2021-12-17 23:29:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-17 23:29:10,664 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-17 23:29:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:29:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-17 23:29:10,665 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-17 23:29:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-17 23:29:10,666 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-17 23:29:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-17 23:29:10,666 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-17 23:29:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:29:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-17 23:29:10,667 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-17 23:29:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 23:29:10,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 23:29:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:29:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:29:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 23:29:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:29:10,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:29:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-17 23:29:10,668 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-17 23:29:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-17 23:29:10,669 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-17 23:29:10,669 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-17 23:29:10,669 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-17 23:29:10,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-17 23:29:10,670 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-17 23:29:10,670 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 23:29:10,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 23:29:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:29:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 23:29:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 23:29:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-17 23:29:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-17 23:29:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-17 23:29:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-17 23:29:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:29:10,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:29:10,897 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:29:10,898 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:29:11,287 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:29:11,295 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:29:11,295 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 23:29:11,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:29:11 BoogieIcfgContainer [2021-12-17 23:29:11,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:29:11,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:29:11,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:29:11,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:29:11,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:29:08" (1/3) ... [2021-12-17 23:29:11,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdc447a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:29:11, skipping insertion in model container [2021-12-17 23:29:11,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:29:10" (2/3) ... [2021-12-17 23:29:11,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdc447a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:29:11, skipping insertion in model container [2021-12-17 23:29:11,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:29:11" (3/3) ... [2021-12-17 23:29:11,303 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2021-12-17 23:29:11,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:29:11,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:29:11,344 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:29:11,355 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 [2021-12-17 23:29:11,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 23:29:11,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 23:29:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 23:29:11,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:11,377 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:29:11,378 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1460968734, now seen corresponding path program 1 times [2021-12-17 23:29:11,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:11,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258842774] [2021-12-17 23:29:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:11,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:29:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:29:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:29:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:29:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 23:29:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 23:29:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 23:29:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:29:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 23:29:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 23:29:11,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:11,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258842774] [2021-12-17 23:29:11,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258842774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:11,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:11,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 23:29:11,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402821331] [2021-12-17 23:29:11,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:11,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 23:29:11,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:11,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 23:29:11,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:29:11,913 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 23:29:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:12,118 INFO L93 Difference]: Finished difference Result 228 states and 297 transitions. [2021-12-17 23:29:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 23:29:12,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-12-17 23:29:12,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:12,127 INFO L225 Difference]: With dead ends: 228 [2021-12-17 23:29:12,128 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 23:29:12,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:29:12,133 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:12,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 162 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:29:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 23:29:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2021-12-17 23:29:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 23:29:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2021-12-17 23:29:12,174 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2021-12-17 23:29:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:12,174 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2021-12-17 23:29:12,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 23:29:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2021-12-17 23:29:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 23:29:12,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:12,178 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:29:12,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:29:12,178 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:12,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1894775411, now seen corresponding path program 1 times [2021-12-17 23:29:12,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:12,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784502889] [2021-12-17 23:29:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:12,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 23:29:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 23:29:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 23:29:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 23:29:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 23:29:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 23:29:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 23:29:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 23:29:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 23:29:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 23:29:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 23:29:12,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:12,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784502889] [2021-12-17 23:29:12,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784502889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:12,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:12,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 23:29:12,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959706701] [2021-12-17 23:29:12,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:12,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:29:12,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:29:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:29:12,396 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 23:29:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:12,709 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2021-12-17 23:29:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:29:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2021-12-17 23:29:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:12,711 INFO L225 Difference]: With dead ends: 199 [2021-12-17 23:29:12,711 INFO L226 Difference]: Without dead ends: 126 [2021-12-17 23:29:12,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:29:12,712 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 88 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:12,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 366 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 23:29:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-17 23:29:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-12-17 23:29:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-17 23:29:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-12-17 23:29:12,722 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2021-12-17 23:29:12,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:12,722 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-12-17 23:29:12,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 23:29:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-12-17 23:29:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 23:29:12,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:12,724 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:29:12,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:29:12,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1692678563, now seen corresponding path program 1 times [2021-12-17 23:29:12,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584338231] [2021-12-17 23:29:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:12,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:12,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:29:12,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947485449] [2021-12-17 23:29:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:12,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:29:12,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:12,761 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) [2021-12-17 23:29:12,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:29:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 23:29:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:29:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 23:29:13,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:29:13,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584338231] [2021-12-17 23:29:13,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:29:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947485449] [2021-12-17 23:29:13,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947485449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:13,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:13,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 23:29:13,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848269715] [2021-12-17 23:29:13,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:13,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:29:13,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:29:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:29:13,238 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 23:29:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:13,272 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2021-12-17 23:29:13,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:29:13,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 86 [2021-12-17 23:29:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:13,274 INFO L225 Difference]: With dead ends: 190 [2021-12-17 23:29:13,274 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 23:29:13,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:29:13,275 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:13,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 890 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:29:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 23:29:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2021-12-17 23:29:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:29:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-12-17 23:29:13,282 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 86 [2021-12-17 23:29:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:13,283 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-12-17 23:29:13,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 23:29:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-12-17 23:29:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 23:29:13,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:13,284 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:29:13,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 23:29:13,516 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 [2021-12-17 23:29:13,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash -124616364, now seen corresponding path program 1 times [2021-12-17 23:29:13,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:13,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612643247] [2021-12-17 23:29:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:13,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:13,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:29:13,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032740298] [2021-12-17 23:29:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:13,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:29:13,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:13,554 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) [2021-12-17 23:29:13,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:29:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:13,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 23:29:13,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:29:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 23:29:13,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:29:13,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612643247] [2021-12-17 23:29:13,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:29:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032740298] [2021-12-17 23:29:13,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032740298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:13,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:13,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:29:13,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975667325] [2021-12-17 23:29:13,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:13,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:29:13,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:13,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:29:13,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:29:13,997 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:29:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:14,025 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2021-12-17 23:29:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 23:29:14,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-17 23:29:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:14,027 INFO L225 Difference]: With dead ends: 134 [2021-12-17 23:29:14,027 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 23:29:14,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:29:14,028 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 2 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:14,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 382 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:29:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 23:29:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-12-17 23:29:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 78 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:29:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2021-12-17 23:29:14,035 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 86 [2021-12-17 23:29:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:14,035 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2021-12-17 23:29:14,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:29:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2021-12-17 23:29:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 23:29:14,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:14,037 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:29:14,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 23:29:14,253 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 [2021-12-17 23:29:14,253 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:14,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:14,254 INFO L85 PathProgramCache]: Analyzing trace with hash -117447722, now seen corresponding path program 1 times [2021-12-17 23:29:14,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:14,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261957638] [2021-12-17 23:29:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:14,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:14,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:29:14,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017420890] [2021-12-17 23:29:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:14,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:29:14,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:14,285 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) [2021-12-17 23:29:14,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:29:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 23:29:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:29:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 23:29:14,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:29:14,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:14,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261957638] [2021-12-17 23:29:14,710 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:29:14,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017420890] [2021-12-17 23:29:14,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017420890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:14,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:14,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:29:14,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924443505] [2021-12-17 23:29:14,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:14,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:29:14,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:14,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:29:14,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:29:14,712 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:29:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:14,735 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2021-12-17 23:29:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 23:29:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2021-12-17 23:29:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:14,737 INFO L225 Difference]: With dead ends: 166 [2021-12-17 23:29:14,737 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 23:29:14,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:29:14,738 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:14,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:29:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 23:29:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-12-17 23:29:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 79 states have internal predecessors, (93), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:29:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2021-12-17 23:29:14,743 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 87 [2021-12-17 23:29:14,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:14,743 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2021-12-17 23:29:14,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:29:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2021-12-17 23:29:14,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 23:29:14,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:14,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:29:14,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:29:14,961 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 [2021-12-17 23:29:14,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash 995990719, now seen corresponding path program 1 times [2021-12-17 23:29:14,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:14,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424826173] [2021-12-17 23:29:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:14,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:14,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:29:14,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580418433] [2021-12-17 23:29:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:14,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:29:14,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:14,995 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) [2021-12-17 23:29:15,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:29:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:15,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 2148 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:29:15,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:29:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 23:29:15,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:29:15,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:15,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424826173] [2021-12-17 23:29:15,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:29:15,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580418433] [2021-12-17 23:29:15,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580418433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:15,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:15,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:29:15,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668841320] [2021-12-17 23:29:15,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:15,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:29:15,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:15,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:29:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:29:15,565 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:29:15,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:15,586 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-12-17 23:29:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:29:15,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2021-12-17 23:29:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:15,587 INFO L225 Difference]: With dead ends: 160 [2021-12-17 23:29:15,587 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 23:29:15,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:29:15,588 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 4 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:15,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 510 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:29:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 23:29:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2021-12-17 23:29:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 79 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:29:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2021-12-17 23:29:15,594 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 87 [2021-12-17 23:29:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:15,595 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2021-12-17 23:29:15,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:29:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2021-12-17 23:29:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-17 23:29:15,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:15,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:29:15,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 23:29:15,815 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 [2021-12-17 23:29:15,815 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:15,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash -462422751, now seen corresponding path program 1 times [2021-12-17 23:29:15,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:15,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183927248] [2021-12-17 23:29:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:15,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:15,857 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:29:15,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360184716] [2021-12-17 23:29:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:15,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:29:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:15,859 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) [2021-12-17 23:29:15,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:29:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:16,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-17 23:29:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:29:16,575 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-17 23:29:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 23:29:16,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:29:30,649 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-12-17 23:29:30,650 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 28 [2021-12-17 23:29:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 23:29:30,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:30,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183927248] [2021-12-17 23:29:30,776 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:29:30,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360184716] [2021-12-17 23:29:30,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360184716] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 23:29:30,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:29:30,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 26 [2021-12-17 23:29:30,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173018223] [2021-12-17 23:29:30,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:30,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 23:29:30,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:30,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 23:29:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=554, Unknown=4, NotChecked=0, Total=650 [2021-12-17 23:29:30,782 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 11 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 23:29:55,015 WARN L227 SmtUtils]: Spent 18.05s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 23:29:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:55,031 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2021-12-17 23:29:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 23:29:55,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2021-12-17 23:29:55,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:55,033 INFO L225 Difference]: With dead ends: 124 [2021-12-17 23:29:55,033 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 23:29:55,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=105, Invalid=644, Unknown=7, NotChecked=0, Total=756 [2021-12-17 23:29:55,034 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 24 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:55,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 526 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2021-12-17 23:29:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 23:29:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-12-17 23:29:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 80 states have (on average 1.1875) internal successors, (95), 82 states have internal predecessors, (95), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-12-17 23:29:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2021-12-17 23:29:55,040 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 90 [2021-12-17 23:29:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:55,040 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2021-12-17 23:29:55,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 23:29:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2021-12-17 23:29:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 23:29:55,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:55,041 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-17 23:29:55,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:29:55,241 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 [2021-12-17 23:29:55,242 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash -910834864, now seen corresponding path program 2 times [2021-12-17 23:29:55,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:55,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126629666] [2021-12-17 23:29:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:55,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:55,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:29:55,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860779976] [2021-12-17 23:29:55,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:29:55,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:29:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:55,288 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) [2021-12-17 23:29:55,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:29:55,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:29:55,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:29:55,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 2159 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 23:29:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:29:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 23:29:55,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:29:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 23:29:56,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:56,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126629666] [2021-12-17 23:29:56,092 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:29:56,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860779976] [2021-12-17 23:29:56,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860779976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:29:56,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:29:56,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-17 23:29:56,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247923925] [2021-12-17 23:29:56,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:29:56,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:29:56,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:56,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:29:56,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:29:56,093 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 23:29:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:56,157 INFO L93 Difference]: Finished difference Result 184 states and 220 transitions. [2021-12-17 23:29:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:29:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2021-12-17 23:29:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:56,158 INFO L225 Difference]: With dead ends: 184 [2021-12-17 23:29:56,158 INFO L226 Difference]: Without dead ends: 130 [2021-12-17 23:29:56,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:29:56,159 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 42 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:56,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 511 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:29:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-17 23:29:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-12-17 23:29:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 90 states have internal predecessors, (105), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-12-17 23:29:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2021-12-17 23:29:56,165 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 93 [2021-12-17 23:29:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:56,165 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2021-12-17 23:29:56,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 23:29:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2021-12-17 23:29:56,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 23:29:56,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:56,166 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-17 23:29:56,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 23:29:56,366 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 [2021-12-17 23:29:56,367 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:56,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash -694247519, now seen corresponding path program 1 times [2021-12-17 23:29:56,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:56,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864236207] [2021-12-17 23:29:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:56,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:56,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:29:56,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332362317] [2021-12-17 23:29:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:56,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:29:56,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:56,452 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) [2021-12-17 23:29:56,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:29:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 2189 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 23:29:56,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:29:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 23:29:56,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:29:56,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:56,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864236207] [2021-12-17 23:29:56,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:29:56,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332362317] [2021-12-17 23:29:56,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332362317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:29:56,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:29:56,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 23:29:56,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826035111] [2021-12-17 23:29:56,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:29:56,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:29:56,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:29:56,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:29:56,909 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 23:29:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:57,029 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2021-12-17 23:29:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:29:57,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 96 [2021-12-17 23:29:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:57,030 INFO L225 Difference]: With dead ends: 181 [2021-12-17 23:29:57,030 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 23:29:57,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-17 23:29:57,031 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 157 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:57,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 451 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:29:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 23:29:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-17 23:29:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 88 states have internal predecessors, (103), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:29:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2021-12-17 23:29:57,037 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 96 [2021-12-17 23:29:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:57,037 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2021-12-17 23:29:57,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 23:29:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2021-12-17 23:29:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 23:29:57,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:57,038 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:29:57,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 23:29:57,251 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 [2021-12-17 23:29:57,251 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:57,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1799659061, now seen corresponding path program 1 times [2021-12-17 23:29:57,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:57,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949645125] [2021-12-17 23:29:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:57,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:57,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:29:57,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424588431] [2021-12-17 23:29:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:57,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:29:57,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:57,294 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) [2021-12-17 23:29:57,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 23:29:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:29:57,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 2330 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 23:29:57,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:29:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 23:29:57,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:29:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 23:29:57,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:29:57,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949645125] [2021-12-17 23:29:57,966 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:29:57,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424588431] [2021-12-17 23:29:57,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424588431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:29:57,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:29:57,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-17 23:29:57,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727068460] [2021-12-17 23:29:57,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:29:57,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:29:57,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:29:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:29:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:29:57,967 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:29:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:29:58,015 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2021-12-17 23:29:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:29:58,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-12-17 23:29:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:29:58,016 INFO L225 Difference]: With dead ends: 161 [2021-12-17 23:29:58,016 INFO L226 Difference]: Without dead ends: 127 [2021-12-17 23:29:58,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:29:58,017 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 9 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:29:58,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 506 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:29:58,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-17 23:29:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-17 23:29:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 91 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:29:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 151 transitions. [2021-12-17 23:29:58,022 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 151 transitions. Word has length 111 [2021-12-17 23:29:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:29:58,022 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 151 transitions. [2021-12-17 23:29:58,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:29:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 151 transitions. [2021-12-17 23:29:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 23:29:58,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:29:58,023 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:29:58,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 23:29:58,242 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 [2021-12-17 23:29:58,243 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:29:58,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:29:58,243 INFO L85 PathProgramCache]: Analyzing trace with hash -564772413, now seen corresponding path program 2 times [2021-12-17 23:29:58,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:29:58,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830542248] [2021-12-17 23:29:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:29:58,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:29:58,282 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:29:58,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056162473] [2021-12-17 23:29:58,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:29:58,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:29:58,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:29:58,284 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) [2021-12-17 23:29:58,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 23:29:58,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:29:58,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:29:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 2387 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-17 23:29:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:29:59,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:29:59,132 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-12-17 23:29:59,133 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 22 treesize of output 21 [2021-12-17 23:29:59,165 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-12-17 23:29:59,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-12-17 23:29:59,205 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-12-17 23:29:59,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-12-17 23:29:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:29:59,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:30:00,166 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 111 treesize of output 105 [2021-12-17 23:30:00,625 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 34 treesize of output 32 [2021-12-17 23:30:00,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 382 treesize of output 378 [2021-12-17 23:30:00,714 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 34 treesize of output 32 [2021-12-17 23:30:00,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:00,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 180 treesize of output 176 [2021-12-17 23:30:00,737 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 34 treesize of output 32 [2021-12-17 23:30:00,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:00,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:00,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 84 treesize of output 80 [2021-12-17 23:30:00,753 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 32 treesize of output 30 [2021-12-17 23:30:00,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:00,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:00,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:00,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 24 [2021-12-17 23:30:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 23:30:01,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830542248] [2021-12-17 23:30:01,132 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:30:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056162473] [2021-12-17 23:30:01,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056162473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:30:01,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:30:01,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-12-17 23:30:01,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127469924] [2021-12-17 23:30:01,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:30:01,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 23:30:01,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 23:30:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-12-17 23:30:01,133 INFO L87 Difference]: Start difference. First operand 127 states and 151 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 6 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-12-17 23:30:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:30:01,598 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2021-12-17 23:30:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 23:30:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 6 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) Word has length 114 [2021-12-17 23:30:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:30:01,600 INFO L225 Difference]: With dead ends: 146 [2021-12-17 23:30:01,600 INFO L226 Difference]: Without dead ends: 137 [2021-12-17 23:30:01,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 23:30:01,601 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 36 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 23:30:01,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1761 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 278 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2021-12-17 23:30:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-17 23:30:01,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-12-17 23:30:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 96 states have internal predecessors, (112), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:30:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2021-12-17 23:30:01,609 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 114 [2021-12-17 23:30:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:30:01,609 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2021-12-17 23:30:01,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 6 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-12-17 23:30:01,609 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2021-12-17 23:30:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 23:30:01,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:30:01,611 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:30:01,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 23:30:01,823 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 [2021-12-17 23:30:01,823 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:30:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash -582835346, now seen corresponding path program 3 times [2021-12-17 23:30:01,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534525950] [2021-12-17 23:30:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:01,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:01,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:30:01,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077234493] [2021-12-17 23:30:01,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:30:01,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:30:01,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:30:01,880 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) [2021-12-17 23:30:01,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 23:30:02,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 23:30:02,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:30:02,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 2365 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-17 23:30:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:30:03,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-17 23:30:03,226 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-17 23:30:03,226 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 25 treesize of output 24 [2021-12-17 23:30:03,276 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-17 23:30:03,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-17 23:30:03,325 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-12-17 23:30:03,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-12-17 23:30:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 23:30:03,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:30:04,579 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 111 treesize of output 105 [2021-12-17 23:30:05,069 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 34 treesize of output 32 [2021-12-17 23:30:05,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 382 treesize of output 378 [2021-12-17 23:30:05,091 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 34 treesize of output 32 [2021-12-17 23:30:05,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:05,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 182 treesize of output 178 [2021-12-17 23:30:05,109 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 34 treesize of output 32 [2021-12-17 23:30:05,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:05,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:05,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 84 treesize of output 80 [2021-12-17 23:30:05,125 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 32 treesize of output 30 [2021-12-17 23:30:05,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:05,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:05,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:05,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 24 [2021-12-17 23:30:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 23:30:05,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:05,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534525950] [2021-12-17 23:30:05,610 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:30:05,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077234493] [2021-12-17 23:30:05,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077234493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:30:05,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:30:05,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 36 [2021-12-17 23:30:05,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40793739] [2021-12-17 23:30:05,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:30:05,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 23:30:05,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:05,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 23:30:05,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 23:30:05,611 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand has 36 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 7 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-17 23:30:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:30:06,886 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2021-12-17 23:30:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 23:30:06,887 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 7 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) Word has length 117 [2021-12-17 23:30:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:30:06,887 INFO L225 Difference]: With dead ends: 149 [2021-12-17 23:30:06,887 INFO L226 Difference]: Without dead ends: 142 [2021-12-17 23:30:06,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 23:30:06,888 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 53 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 23:30:06,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 2161 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 718 Invalid, 0 Unknown, 236 Unchecked, 0.8s Time] [2021-12-17 23:30:06,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-17 23:30:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2021-12-17 23:30:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 99 states have internal predecessors, (115), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:30:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2021-12-17 23:30:06,895 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 117 [2021-12-17 23:30:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:30:06,896 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2021-12-17 23:30:06,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 7 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-17 23:30:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2021-12-17 23:30:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 23:30:06,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:30:06,897 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:30:06,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 23:30:07,107 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 [2021-12-17 23:30:07,108 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:30:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1824760349, now seen corresponding path program 4 times [2021-12-17 23:30:07,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:07,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208236416] [2021-12-17 23:30:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:07,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:07,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:30:07,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456810924] [2021-12-17 23:30:07,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:30:07,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:30:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:30:07,156 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) [2021-12-17 23:30:07,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 23:30:07,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:30:07,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:30:07,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 2401 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-17 23:30:07,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:30:07,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 23:30:07,938 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-17 23:30:07,939 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 21 treesize of output 20 [2021-12-17 23:30:07,969 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-12-17 23:30:07,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-12-17 23:30:08,025 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-12-17 23:30:08,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-12-17 23:30:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:30:08,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:30:09,268 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 111 treesize of output 105 [2021-12-17 23:30:09,750 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 34 treesize of output 32 [2021-12-17 23:30:09,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 380 treesize of output 376 [2021-12-17 23:30:09,774 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 34 treesize of output 32 [2021-12-17 23:30:09,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:09,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 180 treesize of output 176 [2021-12-17 23:30:09,794 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 34 treesize of output 32 [2021-12-17 23:30:09,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:09,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:09,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 84 treesize of output 80 [2021-12-17 23:30:09,808 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 32 treesize of output 30 [2021-12-17 23:30:09,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:09,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:09,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:30:09,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 24 [2021-12-17 23:30:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 23:30:10,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:10,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208236416] [2021-12-17 23:30:10,269 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:30:10,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456810924] [2021-12-17 23:30:10,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456810924] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:30:10,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:30:10,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-12-17 23:30:10,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258306657] [2021-12-17 23:30:10,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:30:10,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 23:30:10,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 23:30:10,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 23:30:10,271 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand has 35 states, 35 states have (on average 3.0) internal successors, (105), 32 states have internal predecessors, (105), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-17 23:30:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:30:11,005 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2021-12-17 23:30:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 23:30:11,005 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 32 states have internal predecessors, (105), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 120 [2021-12-17 23:30:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:30:11,008 INFO L225 Difference]: With dead ends: 155 [2021-12-17 23:30:11,008 INFO L226 Difference]: Without dead ends: 148 [2021-12-17 23:30:11,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 23:30:11,012 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 61 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:30:11,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 2100 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 347 Invalid, 0 Unknown, 252 Unchecked, 0.5s Time] [2021-12-17 23:30:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-17 23:30:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2021-12-17 23:30:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 103 states have internal predecessors, (120), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:30:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2021-12-17 23:30:11,020 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 120 [2021-12-17 23:30:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:30:11,020 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2021-12-17 23:30:11,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 32 states have internal predecessors, (105), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2021-12-17 23:30:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2021-12-17 23:30:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 23:30:11,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:30:11,022 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 23:30:11,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 23:30:11,227 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 [2021-12-17 23:30:11,227 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:30:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1130730318, now seen corresponding path program 5 times [2021-12-17 23:30:11,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:11,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088414369] [2021-12-17 23:30:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:11,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:11,271 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:30:11,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212109042] [2021-12-17 23:30:11,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 23:30:11,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:30:11,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:30:11,279 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) [2021-12-17 23:30:11,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 23:30:12,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 23:30:12,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:30:12,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 23:30:12,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:30:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 23:30:12,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:30:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-17 23:30:13,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:13,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088414369] [2021-12-17 23:30:13,261 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:30:13,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212109042] [2021-12-17 23:30:13,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212109042] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:30:13,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:30:13,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 23:30:13,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918235102] [2021-12-17 23:30:13,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:30:13,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 23:30:13,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:30:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 23:30:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:30:13,262 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:30:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:30:13,711 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2021-12-17 23:30:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 23:30:13,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 123 [2021-12-17 23:30:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:30:13,721 INFO L225 Difference]: With dead ends: 179 [2021-12-17 23:30:13,722 INFO L226 Difference]: Without dead ends: 146 [2021-12-17 23:30:13,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:30:13,723 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 32 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:30:13,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 760 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:30:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-17 23:30:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-12-17 23:30:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:30:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 171 transitions. [2021-12-17 23:30:13,737 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 171 transitions. Word has length 123 [2021-12-17 23:30:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:30:13,738 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 171 transitions. [2021-12-17 23:30:13,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:30:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 171 transitions. [2021-12-17 23:30:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 23:30:13,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:30:13,753 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 4, 4, 4, 4, 4, 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] [2021-12-17 23:30:13,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 23:30:13,953 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 [2021-12-17 23:30:13,953 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:30:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:30:13,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1187340430, now seen corresponding path program 6 times [2021-12-17 23:30:13,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:30:13,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761169671] [2021-12-17 23:30:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:30:13,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:30:13,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 23:30:13,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823413165] [2021-12-17 23:30:13,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 23:30:13,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:30:13,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:30:13,994 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) [2021-12-17 23:30:13,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 23:30:31,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-17 23:30:31,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:30:31,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 142 conjunts are in the unsatisfiable core [2021-12-17 23:30:31,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:30:31,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 23:30:31,654 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 23:30:31,654 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 [2021-12-17 23:30:31,701 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-12-17 23:30:31,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-17 23:30:31,760 INFO L354 Elim1Store]: treesize reduction 125, result has 18.8 percent of original size [2021-12-17 23:30:31,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 48 [2021-12-17 23:30:31,830 INFO L354 Elim1Store]: treesize reduction 196, result has 16.6 percent of original size [2021-12-17 23:30:31,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-12-17 23:30:31,898 INFO L354 Elim1Store]: treesize reduction 281, result has 14.8 percent of original size [2021-12-17 23:30:31,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-12-17 23:30:31,983 INFO L354 Elim1Store]: treesize reduction 336, result has 14.1 percent of original size [2021-12-17 23:30:31,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 82 [2021-12-17 23:30:32,089 INFO L354 Elim1Store]: treesize reduction 448, result has 12.5 percent of original size [2021-12-17 23:30:32,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 95 [2021-12-17 23:30:32,231 INFO L354 Elim1Store]: treesize reduction 544, result has 11.8 percent of original size [2021-12-17 23:30:32,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 86 treesize of output 106 [2021-12-17 23:30:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 23:30:32,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:30:54,318 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 23:30:54,318 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 33203 treesize of output 33191 [2021-12-17 23:30:54,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:30:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761169671] [2021-12-17 23:30:54,398 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 23:30:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823413165] [2021-12-17 23:30:54,399 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 23:30:54,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:30:54,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-17 23:30:54,399 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-17 23:30:54,399 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-17 23:30:54,404 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 23:30:54,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 23:30:54,619 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 [2021-12-17 23:30:54,622 INFO L732 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:30:54,625 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 23:30:54,633 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2021-12-17 23:30:54,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 11:30:54 BoogieIcfgContainer [2021-12-17 23:30:54,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 23:30:54,668 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 23:30:54,668 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 23:30:54,668 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 23:30:54,668 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:29:11" (3/4) ... [2021-12-17 23:30:54,681 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 23:30:54,681 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 23:30:54,682 INFO L158 Benchmark]: Toolchain (without parser) took 105748.56ms. Allocated memory was 75.5MB in the beginning and 249.6MB in the end (delta: 174.1MB). Free memory was 47.4MB in the beginning and 170.7MB in the end (delta: -123.3MB). Peak memory consumption was 50.1MB. Max. memory is 16.1GB. [2021-12-17 23:30:54,683 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 75.5MB. Free memory was 56.6MB in the beginning and 56.5MB in the end (delta: 36.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 23:30:54,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1376.83ms. Allocated memory was 75.5MB in the beginning and 119.5MB in the end (delta: 44.0MB). Free memory was 47.2MB in the beginning and 53.8MB in the end (delta: -6.6MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. [2021-12-17 23:30:54,683 INFO L158 Benchmark]: Boogie Procedure Inliner took 162.08ms. Allocated memory is still 119.5MB. Free memory was 53.8MB in the beginning and 74.3MB in the end (delta: -20.5MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-12-17 23:30:54,683 INFO L158 Benchmark]: Boogie Preprocessor took 72.20ms. Allocated memory is still 119.5MB. Free memory was 74.3MB in the beginning and 68.7MB in the end (delta: 5.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 23:30:54,683 INFO L158 Benchmark]: RCFGBuilder took 750.65ms. Allocated memory was 119.5MB in the beginning and 155.2MB in the end (delta: 35.7MB). Free memory was 68.7MB in the beginning and 90.5MB in the end (delta: -21.7MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. [2021-12-17 23:30:54,684 INFO L158 Benchmark]: TraceAbstraction took 103368.33ms. Allocated memory was 155.2MB in the beginning and 249.6MB in the end (delta: 94.4MB). Free memory was 90.5MB in the beginning and 171.8MB in the end (delta: -81.3MB). Peak memory consumption was 133.7MB. Max. memory is 16.1GB. [2021-12-17 23:30:54,684 INFO L158 Benchmark]: Witness Printer took 13.84ms. Allocated memory is still 249.6MB. Free memory was 171.8MB in the beginning and 170.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 23:30:54,687 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 75.5MB. Free memory was 56.6MB in the beginning and 56.5MB in the end (delta: 36.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1376.83ms. Allocated memory was 75.5MB in the beginning and 119.5MB in the end (delta: 44.0MB). Free memory was 47.2MB in the beginning and 53.8MB in the end (delta: -6.6MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 162.08ms. Allocated memory is still 119.5MB. Free memory was 53.8MB in the beginning and 74.3MB in the end (delta: -20.5MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.20ms. Allocated memory is still 119.5MB. Free memory was 74.3MB in the beginning and 68.7MB in the end (delta: 5.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 750.65ms. Allocated memory was 119.5MB in the beginning and 155.2MB in the end (delta: 35.7MB). Free memory was 68.7MB in the beginning and 90.5MB in the end (delta: -21.7MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. * TraceAbstraction took 103368.33ms. Allocated memory was 155.2MB in the beginning and 249.6MB in the end (delta: 94.4MB). Free memory was 90.5MB in the beginning and 171.8MB in the end (delta: -81.3MB). Peak memory consumption was 133.7MB. Max. memory is 16.1GB. * Witness Printer took 13.84ms. Allocated memory is still 249.6MB. Free memory was 171.8MB in the beginning and 170.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 223]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint, overapproximation of large string literal at line 7546, overapproximation of __builtin_umull_overflow at line 255, overapproximation of to_real at line -1. Possible FailurePath: [L2762-L2767] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7141] static __thread int tl_last_error = 0; [L7545-L7693] static struct aws_error_info errors[] = { [(AWS_ERROR_SUCCESS)-0x0000] = { .literal_name = "AWS_ERROR_SUCCESS", .error_code = (AWS_ERROR_SUCCESS), .error_str = ("Success."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_SUCCESS" ", " "Success.", } , [(AWS_ERROR_OOM)-0x0000] = { .literal_name = "AWS_ERROR_OOM", .error_code = (AWS_ERROR_OOM), .error_str = ("Out of memory."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_OOM" ", " "Out of memory.", } , [(AWS_ERROR_UNKNOWN)-0x0000] = { .literal_name = "AWS_ERROR_UNKNOWN", .error_code = (AWS_ERROR_UNKNOWN), .error_str = ("Unknown error."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_UNKNOWN" ", " "Unknown error.", } , [(AWS_ERROR_SHORT_BUFFER)-0x0000] = { .literal_name = "AWS_ERROR_SHORT_BUFFER", .error_code = (AWS_ERROR_SHORT_BUFFER), .error_str = ("Buffer is not large enough to hold result."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_SHORT_BUFFER" ", " "Buffer is not large enough to hold result.", } , [(AWS_ERROR_OVERFLOW_DETECTED)-0x0000] = { .literal_name = "AWS_ERROR_OVERFLOW_DETECTED", .error_code = (AWS_ERROR_OVERFLOW_DETECTED), .error_str = ("Fixed size value overflow was detected."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_OVERFLOW_DETECTED" ", " "Fixed size value overflow was detected.", } , [(AWS_ERROR_UNSUPPORTED_OPERATION)-0x0000] = { .literal_name = "AWS_ERROR_UNSUPPORTED_OPERATION", .error_code = (AWS_ERROR_UNSUPPORTED_OPERATION), .error_str = ("Unsupported operation."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_UNSUPPORTED_OPERATION" ", " "Unsupported operation.", } , [(AWS_ERROR_INVALID_BUFFER_SIZE)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_BUFFER_SIZE", .error_code = (AWS_ERROR_INVALID_BUFFER_SIZE), .error_str = ("Invalid buffer size."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_BUFFER_SIZE" ", " "Invalid buffer size.", } , [(AWS_ERROR_INVALID_HEX_STR)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_HEX_STR", .error_code = (AWS_ERROR_INVALID_HEX_STR), .error_str = ("Invalid hex string."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_HEX_STR" ", " "Invalid hex string.", } , [(AWS_ERROR_INVALID_BASE64_STR)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_BASE64_STR", .error_code = (AWS_ERROR_INVALID_BASE64_STR), .error_str = ("Invalid base64 string."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_BASE64_STR" ", " "Invalid base64 string.", } , [(AWS_ERROR_INVALID_INDEX)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_INDEX", .error_code = (AWS_ERROR_INVALID_INDEX), .error_str = ("Invalid index for list access."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_INDEX" ", " "Invalid index for list access.", } , [(AWS_ERROR_THREAD_INVALID_SETTINGS)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_INVALID_SETTINGS", .error_code = (AWS_ERROR_THREAD_INVALID_SETTINGS), .error_str = ("Invalid thread settings."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_INVALID_SETTINGS" ", " "Invalid thread settings.", } , [(AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE", .error_code = (AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE), .error_str = ("Insufficent resources for thread."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_INSUFFICIENT_RESOURCE" ", " "Insufficent resources for thread.", } , [(AWS_ERROR_THREAD_NO_PERMISSIONS)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_NO_PERMISSIONS", .error_code = (AWS_ERROR_THREAD_NO_PERMISSIONS), .error_str = ("Insufficient permissions for thread operation."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_NO_PERMISSIONS" ", " "Insufficient permissions for thread operation.", } , [(AWS_ERROR_THREAD_NOT_JOINABLE)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_NOT_JOINABLE", .error_code = (AWS_ERROR_THREAD_NOT_JOINABLE), .error_str = ("Thread not joinable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_NOT_JOINABLE" ", " "Thread not joinable.", } , [(AWS_ERROR_THREAD_NO_SUCH_THREAD_ID)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_NO_SUCH_THREAD_ID", .error_code = (AWS_ERROR_THREAD_NO_SUCH_THREAD_ID), .error_str = ("No such thread ID."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_NO_SUCH_THREAD_ID" ", " "No such thread ID.", } , [(AWS_ERROR_THREAD_DEADLOCK_DETECTED)-0x0000] = { .literal_name = "AWS_ERROR_THREAD_DEADLOCK_DETECTED", .error_code = (AWS_ERROR_THREAD_DEADLOCK_DETECTED), .error_str = ("Deadlock detected in thread."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_THREAD_DEADLOCK_DETECTED" ", " "Deadlock detected in thread.", } , [(AWS_ERROR_MUTEX_NOT_INIT)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_NOT_INIT", .error_code = (AWS_ERROR_MUTEX_NOT_INIT), .error_str = ("Mutex not initialized."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_NOT_INIT" ", " "Mutex not initialized.", } , [(AWS_ERROR_MUTEX_TIMEOUT)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_TIMEOUT", .error_code = (AWS_ERROR_MUTEX_TIMEOUT), .error_str = ("Mutex operation timed out."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_TIMEOUT" ", " "Mutex operation timed out.", } , [(AWS_ERROR_MUTEX_CALLER_NOT_OWNER)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_CALLER_NOT_OWNER", .error_code = (AWS_ERROR_MUTEX_CALLER_NOT_OWNER), .error_str = ("The caller of a mutex operation was not the owner."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_CALLER_NOT_OWNER" ", " "The caller of a mutex operation was not the owner.", } , [(AWS_ERROR_MUTEX_FAILED)-0x0000] = { .literal_name = "AWS_ERROR_MUTEX_FAILED", .error_code = (AWS_ERROR_MUTEX_FAILED), .error_str = ("Mutex operation failed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MUTEX_FAILED" ", " "Mutex operation failed.", } , [(AWS_ERROR_COND_VARIABLE_INIT_FAILED)-0x0000] = { .literal_name = "AWS_ERROR_COND_VARIABLE_INIT_FAILED", .error_code = (AWS_ERROR_COND_VARIABLE_INIT_FAILED), .error_str = ("Condition variable initialization failed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_COND_VARIABLE_INIT_FAILED" ", " "Condition variable initialization failed.", } , [(AWS_ERROR_COND_VARIABLE_TIMED_OUT)-0x0000] = { .literal_name = "AWS_ERROR_COND_VARIABLE_TIMED_OUT", .error_code = (AWS_ERROR_COND_VARIABLE_TIMED_OUT), .error_str = ("Condition variable wait timed out."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_COND_VARIABLE_TIMED_OUT" ", " "Condition variable wait timed out.", } , [(AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN)-0x0000] = { .literal_name = "AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN", .error_code = (AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN), .error_str = ("Condition variable unknown error."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_COND_VARIABLE_ERROR_UNKNOWN" ", " "Condition variable unknown error.", } , [(AWS_ERROR_CLOCK_FAILURE)-0x0000] = { .literal_name = "AWS_ERROR_CLOCK_FAILURE", .error_code = (AWS_ERROR_CLOCK_FAILURE), .error_str = ("Clock operation failed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_CLOCK_FAILURE" ", " "Clock operation failed.", } , [(AWS_ERROR_LIST_EMPTY)-0x0000] = { .literal_name = "AWS_ERROR_LIST_EMPTY", .error_code = (AWS_ERROR_LIST_EMPTY), .error_str = ("Empty list."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_LIST_EMPTY" ", " "Empty list.", } , [(AWS_ERROR_DEST_COPY_TOO_SMALL)-0x0000] = { .literal_name = "AWS_ERROR_DEST_COPY_TOO_SMALL", .error_code = (AWS_ERROR_DEST_COPY_TOO_SMALL), .error_str = ("Destination of copy is too small."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_DEST_COPY_TOO_SMALL" ", " "Destination of copy is too small.", } , [(AWS_ERROR_LIST_EXCEEDS_MAX_SIZE)-0x0000] = { .literal_name = "AWS_ERROR_LIST_EXCEEDS_MAX_SIZE", .error_code = (AWS_ERROR_LIST_EXCEEDS_MAX_SIZE), .error_str = ("A requested operation on a list would exceed it's max size."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_LIST_EXCEEDS_MAX_SIZE" ", " "A requested operation on a list would exceed it's max size.", } , [(AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK)-0x0000] = { .literal_name = "AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK", .error_code = (AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK), .error_str = ("Attempt to shrink a list in static mode."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_LIST_STATIC_MODE_CANT_SHRINK" ", " "Attempt to shrink a list in static mode.", } , [(AWS_ERROR_PRIORITY_QUEUE_FULL)-0x0000] = { .literal_name = "AWS_ERROR_PRIORITY_QUEUE_FULL", .error_code = (AWS_ERROR_PRIORITY_QUEUE_FULL), .error_str = ("Attempt to add items to a full preallocated queue in static mode."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_PRIORITY_QUEUE_FULL" ", " "Attempt to add items to a full preallocated queue in static mode.", } , [(AWS_ERROR_PRIORITY_QUEUE_EMPTY)-0x0000] = { .literal_name = "AWS_ERROR_PRIORITY_QUEUE_EMPTY", .error_code = (AWS_ERROR_PRIORITY_QUEUE_EMPTY), .error_str = ("Attempt to pop an item from an empty queue."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_PRIORITY_QUEUE_EMPTY" ", " "Attempt to pop an item from an empty queue.", } , [(AWS_ERROR_PRIORITY_QUEUE_BAD_NODE)-0x0000] = { .literal_name = "AWS_ERROR_PRIORITY_QUEUE_BAD_NODE", .error_code = (AWS_ERROR_PRIORITY_QUEUE_BAD_NODE), .error_str = ("Bad node handle passed to remove."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_PRIORITY_QUEUE_BAD_NODE" ", " "Bad node handle passed to remove.", } , [(AWS_ERROR_HASHTBL_ITEM_NOT_FOUND)-0x0000] = { .literal_name = "AWS_ERROR_HASHTBL_ITEM_NOT_FOUND", .error_code = (AWS_ERROR_HASHTBL_ITEM_NOT_FOUND), .error_str = ("Item not found in hash table."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_HASHTBL_ITEM_NOT_FOUND" ", " "Item not found in hash table.", } , [(AWS_ERROR_INVALID_DATE_STR)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_DATE_STR", .error_code = (AWS_ERROR_INVALID_DATE_STR), .error_str = ("Date string is invalid and cannot be parsed."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_DATE_STR" ", " "Date string is invalid and cannot be parsed.", } , [(AWS_ERROR_INVALID_ARGUMENT)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_ARGUMENT", .error_code = (AWS_ERROR_INVALID_ARGUMENT), .error_str = ("An invalid argument was passed to a function."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_ARGUMENT" ", " "An invalid argument was passed to a function.", } , [(AWS_ERROR_RANDOM_GEN_FAILED)-0x0000] = { .literal_name = "AWS_ERROR_RANDOM_GEN_FAILED", .error_code = (AWS_ERROR_RANDOM_GEN_FAILED), .error_str = ("A call to the random number generator failed. Retry later."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_RANDOM_GEN_FAILED" ", " "A call to the random number generator failed. Retry later.", } , [(AWS_ERROR_MALFORMED_INPUT_STRING)-0x0000] = { .literal_name = "AWS_ERROR_MALFORMED_INPUT_STRING", .error_code = (AWS_ERROR_MALFORMED_INPUT_STRING), .error_str = ("An input string was passed to a parser and the string was incorrectly formatted."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MALFORMED_INPUT_STRING" ", " "An input string was passed to a parser and the string was incorrectly formatted.", } , [(AWS_ERROR_UNIMPLEMENTED)-0x0000] = { .literal_name = "AWS_ERROR_UNIMPLEMENTED", .error_code = (AWS_ERROR_UNIMPLEMENTED), .error_str = ("A function was called, but is not implemented."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_UNIMPLEMENTED" ", " "A function was called, but is not implemented.", } , [(AWS_ERROR_INVALID_STATE)-0x0000] = { .literal_name = "AWS_ERROR_INVALID_STATE", .error_code = (AWS_ERROR_INVALID_STATE), .error_str = ("An invalid state was encountered."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_INVALID_STATE" ", " "An invalid state was encountered.", } , [(AWS_ERROR_ENVIRONMENT_GET)-0x0000] = { .literal_name = "AWS_ERROR_ENVIRONMENT_GET", .error_code = (AWS_ERROR_ENVIRONMENT_GET), .error_str = ("System call failure when getting an environment variable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_ENVIRONMENT_GET" ", " "System call failure when getting an environment variable.", } , [(AWS_ERROR_ENVIRONMENT_SET)-0x0000] = { .literal_name = "AWS_ERROR_ENVIRONMENT_SET", .error_code = (AWS_ERROR_ENVIRONMENT_SET), .error_str = ("System call failure when setting an environment variable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_ENVIRONMENT_SET" ", " "System call failure when setting an environment variable.", } , [(AWS_ERROR_ENVIRONMENT_UNSET)-0x0000] = { .literal_name = "AWS_ERROR_ENVIRONMENT_UNSET", .error_code = (AWS_ERROR_ENVIRONMENT_UNSET), .error_str = ("System call failure when unsetting an environment variable."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_ENVIRONMENT_UNSET" ", " "System call failure when unsetting an environment variable.", } , [(AWS_ERROR_SYS_CALL_FAILURE)-0x0000] = { .literal_name = "AWS_ERROR_SYS_CALL_FAILURE", .error_code = (AWS_ERROR_SYS_CALL_FAILURE), .error_str = ("System call failure"), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_SYS_CALL_FAILURE" ", " "System call failure", } , [(AWS_ERROR_FILE_INVALID_PATH)-0x0000] = { .literal_name = "AWS_ERROR_FILE_INVALID_PATH", .error_code = (AWS_ERROR_FILE_INVALID_PATH), .error_str = ("Invalid file path."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_FILE_INVALID_PATH" ", " "Invalid file path.", } , [(AWS_ERROR_MAX_FDS_EXCEEDED)-0x0000] = { .literal_name = "AWS_ERROR_MAX_FDS_EXCEEDED", .error_code = (AWS_ERROR_MAX_FDS_EXCEEDED), .error_str = ("The maximum number of fds has been exceeded."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_MAX_FDS_EXCEEDED" ", " "The maximum number of fds has been exceeded.", } , [(AWS_ERROR_NO_PERMISSION)-0x0000] = { .literal_name = "AWS_ERROR_NO_PERMISSION", .error_code = (AWS_ERROR_NO_PERMISSION), .error_str = ("User does not have permission to perform the requested action."), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_NO_PERMISSION" ", " "User does not have permission to perform the requested action.", } , [(AWS_ERROR_STREAM_UNSEEKABLE)-0x0000] = { .literal_name = "AWS_ERROR_STREAM_UNSEEKABLE", .error_code = (AWS_ERROR_STREAM_UNSEEKABLE), .error_str = ("Stream does not support seek operations"), .lib_name = ("aws-c-common"), .formatted_name = "aws-c-common" ": " "AWS_ERROR_STREAM_UNSEEKABLE" ", " "Stream does not support seek operations", } , }; [L7696-L7699] static struct aws_error_info_list s_list = { .error_list = errors, .count = (sizeof(errors) / sizeof((errors)[0])), }; [L7701-L7710] static struct aws_log_subject_info s_common_log_subject_infos[] = { { .subject_id = (AWS_LS_COMMON_GENERAL), .subject_name = ("aws-c-common"), .subject_description = ("Subject for aws-c-common logging that doesn't belong to any particular category") } , { .subject_id = (AWS_LS_COMMON_TASK_SCHEDULER), .subject_name = ("task-scheduler"), .subject_description = ("Subject for task scheduler or task specific logging.") } , }; [L7712-L7715] static struct aws_log_subject_info_list s_common_log_subject_list = { .subject_list = s_common_log_subject_infos, .count = (sizeof(s_common_log_subject_infos) / sizeof((s_common_log_subject_infos)[0])), }; [L7717-L7721] static _Bool s_common_library_initialized = 0 ; [L7748] CALL aws_array_list_clean_up_harness() [L7735] struct aws_array_list list = {0, __VERIFIER_nondet_ulong(), __VERIFIER_nondet_ulong(), __VERIFIER_nondet_ulong(), 0}; [L7738] CALL, EXPR aws_array_list_is_bounded(&list, 9223372036854775808U, 2) [L7005] EXPR list->item_size [L7004-L7005] _Bool item_size_is_bounded = list->item_size <= max_item_size; [L7008] EXPR list->length [L7007-L7008] _Bool length_is_bounded = list->length <= max_initial_item_allocation; [L7009] return item_size_is_bounded && length_is_bounded; [L7738] RET, EXPR aws_array_list_is_bounded(&list, 9223372036854775808U, 2) [L7738] CALL assume_abort_if_not(aws_array_list_is_bounded(&list, 9223372036854775808U, 2)) [L211] COND FALSE !(!cond) [L7738] RET assume_abort_if_not(aws_array_list_is_bounded(&list, 9223372036854775808U, 2)) [L7739] CALL ensure_array_list_has_allocated_data_member(&list) [L7013] EXPR list->current_size [L7013] list->current_size == 0 && list->length == 0 [L7013] EXPR list->length [L7013] list->current_size == 0 && list->length == 0 [L7013] COND TRUE list->current_size == 0 && list->length == 0 [L7014] EXPR list->data [L7014-L7016] CALL assume_abort_if_not(list->data == ((void *)0) ) [L211] COND FALSE !(!cond) [L7014-L7016] RET assume_abort_if_not(list->data == ((void *)0) ) [L7017] CALL, EXPR can_fail_allocator() [L2786] return &s_can_fail_allocator_static; [L7017] RET, EXPR can_fail_allocator() [L7017] list->alloc = can_fail_allocator() [L7739] RET ensure_array_list_has_allocated_data_member(&list) [L7740] CALL, EXPR aws_array_list_is_valid(&list) [L3263] COND FALSE !(!list) [L3268] size_t required_size = 0; [L3272] EXPR list->length [L3272] EXPR list->item_size [L3272] CALL, EXPR aws_mul_size_checked(list->length, list->item_size, &required_size) [L2588] CALL, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2496] CALL __CPROVER_overflow_mult(a, b) [L254] unsigned long c; [L255] return __builtin_umull_overflow(a, b, &c); [L255] return __builtin_umull_overflow(a, b, &c); [L2496] RET __CPROVER_overflow_mult(a, b) [L2496] COND FALSE !(__CPROVER_overflow_mult(a, b)) [L2498] *r = a * b [L2499] return (0); [L2588] RET, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2588] return aws_mul_u64_checked(a, b, (uint64_t *)r); [L3272] RET, EXPR aws_mul_size_checked(list->length, list->item_size, &required_size) [L3270-L3272] _Bool required_size_is_valid = (aws_mul_size_checked(list->length, list->item_size, &required_size) == (0)); [L3275] EXPR list->current_size [L3275] EXPR \read(required_size) [L3274-L3275] _Bool current_size_is_valid = (list->current_size >= required_size); [L3279] EXPR list->current_size [L3279-L3280] EXPR list->current_size == 0 && list->data == ((void *)0) [L3279] EXPR list->data [L3279-L3280] EXPR list->current_size == 0 && list->data == ((void *)0) [L3279-L3281] EXPR (list->current_size == 0 && list->data == ((void *)0) ) || ((((list->current_size)) == 0) || ((list->data))) [L3277-L3281] _Bool data_is_valid = ((list->current_size == 0 && list->data == ((void *)0) ) || ((((list->current_size)) == 0) || ((list->data)))); [L3284] EXPR list->item_size [L3283-L3284] _Bool item_size_is_valid = (list->item_size != 0); [L3285] return required_size_is_valid && current_size_is_valid && data_is_valid && item_size_is_valid; [L3268] size_t required_size = 0; [L3285] return required_size_is_valid && current_size_is_valid && data_is_valid && item_size_is_valid; [L7740] RET, EXPR aws_array_list_is_valid(&list) [L7740] CALL assume_abort_if_not(aws_array_list_is_valid(&list)) [L211] COND FALSE !(!cond) [L7740] RET assume_abort_if_not(aws_array_list_is_valid(&list)) [L7743] CALL aws_array_list_clean_up(&list) [L3302] CALL, EXPR aws_is_mem_zeroed(&(*list), sizeof(*list)) [L2335] size_t i; [L2336] const uint8_t *buf_u8 = (const uint8_t *)buf; [L2337] i = 0 [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND TRUE buf_u8[i] [L2339-L2341] return 0 ; [L3302] RET, EXPR aws_is_mem_zeroed(&(*list), sizeof(*list)) [L3302] EXPR aws_is_mem_zeroed(&(*list), sizeof(*list)) || aws_array_list_is_valid(list) [L3302] CALL, EXPR aws_array_list_is_valid(list) [L3263] COND FALSE !(!list) [L3268] size_t required_size = 0; [L3272] EXPR list->length [L3272] EXPR list->item_size [L3272] CALL, EXPR aws_mul_size_checked(list->length, list->item_size, &required_size) [L2588] CALL, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2496] CALL __CPROVER_overflow_mult(a, b) [L254] unsigned long c; [L255] return __builtin_umull_overflow(a, b, &c); [L255] return __builtin_umull_overflow(a, b, &c); [L2496] RET __CPROVER_overflow_mult(a, b) [L2496] COND FALSE !(__CPROVER_overflow_mult(a, b)) [L2498] *r = a * b [L2499] return (0); [L2588] RET, EXPR aws_mul_u64_checked(a, b, (uint64_t *)r) [L2588] return aws_mul_u64_checked(a, b, (uint64_t *)r); [L3272] RET, EXPR aws_mul_size_checked(list->length, list->item_size, &required_size) [L3270-L3272] _Bool required_size_is_valid = (aws_mul_size_checked(list->length, list->item_size, &required_size) == (0)); [L3275] EXPR list->current_size [L3275] EXPR \read(required_size) [L3274-L3275] _Bool current_size_is_valid = (list->current_size >= required_size); [L3279] EXPR list->current_size [L3279-L3280] EXPR list->current_size == 0 && list->data == ((void *)0) [L3279] EXPR list->data [L3279-L3280] EXPR list->current_size == 0 && list->data == ((void *)0) [L3279-L3281] EXPR (list->current_size == 0 && list->data == ((void *)0) ) || ((((list->current_size)) == 0) || ((list->data))) [L3277-L3281] _Bool data_is_valid = ((list->current_size == 0 && list->data == ((void *)0) ) || ((((list->current_size)) == 0) || ((list->data)))); [L3284] EXPR list->item_size [L3283-L3284] _Bool item_size_is_valid = (list->item_size != 0); [L3285] return required_size_is_valid && current_size_is_valid && data_is_valid && item_size_is_valid; [L3268] size_t required_size = 0; [L3285] return required_size_is_valid && current_size_is_valid && data_is_valid && item_size_is_valid; [L3302] RET, EXPR aws_array_list_is_valid(list) [L3302] EXPR aws_is_mem_zeroed(&(*list), sizeof(*list)) || aws_array_list_is_valid(list) [L3302] CALL assume_abort_if_not((aws_is_mem_zeroed(&(*list), sizeof(*list)) || aws_array_list_is_valid(list))) [L211] COND FALSE !(!cond) [L3302] RET assume_abort_if_not((aws_is_mem_zeroed(&(*list), sizeof(*list)) || aws_array_list_is_valid(list))) [L3303] EXPR list->alloc [L3303] list->alloc && list->data [L3303] EXPR list->data [L3303] list->alloc && list->data [L3303] COND FALSE !(list->alloc && list->data) [L3307] FCALL memset(&(*list), 0, sizeof(*list)) [L7743] RET aws_array_list_clean_up(&list) [L7746] CALL, EXPR aws_is_mem_zeroed(&(list), sizeof(list)) [L2335] size_t i; [L2336] const uint8_t *buf_u8 = (const uint8_t *)buf; [L2337] i = 0 [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND FALSE !(buf_u8[i]) [L2337] ++i [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND FALSE !(buf_u8[i]) [L2337] ++i [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND FALSE !(buf_u8[i]) [L2337] ++i [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND FALSE !(buf_u8[i]) [L2337] ++i [L2337] COND TRUE i < bufsize [L2338] buf_u8[i] [L2338] COND TRUE buf_u8[i] [L2339-L2341] return 0 ; [L7746] RET, EXPR aws_is_mem_zeroed(&(list), sizeof(list)) [L7746] CALL __VERIFIER_assert(aws_is_mem_zeroed(&(list), sizeof(list))) [L223] COND TRUE !cond [L223] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 114 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 103.3s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 28.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 607 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 554 mSDsluCounter, 11456 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 715 IncrementalHoareTripleChecker+Unchecked, 9726 mSDsCounter, 196 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2113 IncrementalHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 196 mSolverCounterUnsat, 1730 mSDtfsCounter, 2113 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2067 GetRequests, 1854 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 42.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=14, InterpolantAutomatonStates: 162, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 57 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 22.7s SatisfiabilityAnalysisTime, 47.5s InterpolantComputationTime, 1475 NumberOfCodeBlocks, 1467 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 2221 ConstructedInterpolants, 49 QuantifiedInterpolants, 12323 SizeOfPredicates, 110 NumberOfNonLiveVariables, 29455 ConjunctsInSsa, 566 ConjunctsInUnsatCore, 22 InterpolantComputations, 8 PerfectInterpolantSequences, 1001/1199 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-17 23:30:54,935 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-12-17 23:30:54,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:30:56,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:30:56,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:30:56,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:30:56,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:30:56,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:30:56,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:30:56,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:30:56,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:30:56,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:30:56,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:30:56,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:30:56,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:30:56,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:30:56,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:30:56,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:30:56,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:30:56,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:30:56,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:30:56,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:30:56,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:30:56,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:30:56,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:30:56,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:30:56,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:30:56,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:30:56,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:30:56,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:30:56,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:30:56,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:30:56,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:30:56,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:30:56,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:30:56,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:30:56,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:30:56,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:30:56,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:30:56,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:30:56,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:30:56,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:30:56,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:30:56,606 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-12-17 23:30:56,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:30:56,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:30:56,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:30:56,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:30:56,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:30:56,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:30:56,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:30:56,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:30:56,641 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:30:56,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:30:56,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:30:56,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:30:56,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:30:56,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:30:56,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:30:56,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:30:56,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:30:56,649 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 23:30:56,649 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 23:30:56,649 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:30:56,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:30:56,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:30:56,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:30:56,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 23:30:56,655 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2021-12-17 23:30:56,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:30:56,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:30:56,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:30:56,926 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:30:56,933 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:30:56,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-12-17 23:30:56,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39e7db5a0/39b9b2f761ec48698ecf24334dde8627/FLAG11d7c6d7c [2021-12-17 23:30:57,571 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:30:57,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2021-12-17 23:30:57,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39e7db5a0/39b9b2f761ec48698ecf24334dde8627/FLAG11d7c6d7c [2021-12-17 23:30:58,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39e7db5a0/39b9b2f761ec48698ecf24334dde8627 [2021-12-17 23:30:58,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:30:58,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:30:58,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:30:58,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:30:58,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:30:58,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:30:58" (1/1) ... [2021-12-17 23:30:58,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e329cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:58, skipping insertion in model container [2021-12-17 23:30:58,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:30:58" (1/1) ... [2021-12-17 23:30:58,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:30:58,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:30:58,286 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-17 23:30:58,291 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-17 23:30:58,796 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:30:58,856 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,857 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,857 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,859 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,860 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,872 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,879 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,881 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,881 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,882 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,882 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,883 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:58,883 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,077 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:30:59,077 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:30:59,078 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:30:59,081 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:30:59,081 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:30:59,083 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:30:59,083 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:30:59,083 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:30:59,084 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:30:59,084 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:30:59,151 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,155 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:30:59,216 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-17 23:30:59,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:30:59,265 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-17 23:30:59,266 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-17 23:30:59,288 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:30:59,310 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,315 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,315 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,316 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,316 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,316 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,347 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:30:59,348 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:30:59,348 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:30:59,349 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:30:59,349 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:30:59,350 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:30:59,350 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:30:59,350 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:30:59,351 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:30:59,351 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:30:59,365 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,371 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:30:59,410 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:30:59,426 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2021-12-17 23:30:59,427 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2021-12-17 23:30:59,457 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-17 23:30:59,473 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,474 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,474 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,474 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,474 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,478 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,478 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,478 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,478 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,479 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,479 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,479 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,479 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,506 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-17 23:30:59,507 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-17 23:30:59,507 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-17 23:30:59,507 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-17 23:30:59,508 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-17 23:30:59,508 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-17 23:30:59,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-17 23:30:59,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-17 23:30:59,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-17 23:30:59,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-17 23:30:59,521 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,524 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-17 23:30:59,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:30:59,754 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:30:59,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59 WrapperNode [2021-12-17 23:30:59,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:30:59,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:30:59,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:30:59,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:30:59,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:30:59,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:30:59,910 INFO L137 Inliner]: procedures = 710, calls = 1553, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 576 [2021-12-17 23:30:59,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:30:59,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:30:59,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:30:59,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:30:59,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:30:59,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:30:59,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:30:59,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:30:59,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:30:59,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:30:59,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:30:59,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:30:59,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:30:59,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:30:59,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:30:59,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (1/1) ... [2021-12-17 23:31:00,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:31:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:31:00,043 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) [2021-12-17 23:31:00,096 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 [2021-12-17 23:31:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-17 23:31:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-17 23:31:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:31:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-17 23:31:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-17 23:31:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-17 23:31:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-17 23:31:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-17 23:31:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-17 23:31:00,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-17 23:31:00,135 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 23:31:00,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:31:00,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-17 23:31:00,135 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-17 23:31:00,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-17 23:31:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-17 23:31:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-17 23:31:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-17 23:31:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-17 23:31:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-17 23:31:00,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-17 23:31:00,137 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-17 23:31:00,138 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 23:31:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 23:31:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:31:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 23:31:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-17 23:31:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 23:31:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-17 23:31:00,139 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-17 23:31:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-17 23:31:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-17 23:31:00,377 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:31:00,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:31:01,073 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:31:01,078 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:31:01,078 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 23:31:01,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:31:01 BoogieIcfgContainer [2021-12-17 23:31:01,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:31:01,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:31:01,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:31:01,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:31:01,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:30:58" (1/3) ... [2021-12-17 23:31:01,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34788d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:31:01, skipping insertion in model container [2021-12-17 23:31:01,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:30:59" (2/3) ... [2021-12-17 23:31:01,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34788d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:31:01, skipping insertion in model container [2021-12-17 23:31:01,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:31:01" (3/3) ... [2021-12-17 23:31:01,083 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2021-12-17 23:31:01,086 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:31:01,086 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:31:01,114 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:31:01,117 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 [2021-12-17 23:31:01,117 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 23:31:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 23:31:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 23:31:01,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:01,138 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:31:01,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 213945854, now seen corresponding path program 1 times [2021-12-17 23:31:01,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:01,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894737900] [2021-12-17 23:31:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:01,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:01,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:01,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:01,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 23:31:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:01,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 23:31:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 23:31:01,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:31:01,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:01,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894737900] [2021-12-17 23:31:01,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894737900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:01,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:01,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 23:31:01,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76565756] [2021-12-17 23:31:01,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:01,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 23:31:01,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 23:31:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 23:31:01,800 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 23:31:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:01,820 INFO L93 Difference]: Finished difference Result 221 states and 288 transitions. [2021-12-17 23:31:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 23:31:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-12-17 23:31:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:01,827 INFO L225 Difference]: With dead ends: 221 [2021-12-17 23:31:01,827 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 23:31:01,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 23:31:01,831 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:31:01,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:31:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 23:31:01,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-17 23:31:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 23:31:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2021-12-17 23:31:01,860 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2021-12-17 23:31:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:01,860 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2021-12-17 23:31:01,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 23:31:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2021-12-17 23:31:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 23:31:01,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:01,863 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:31:01,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:31:02,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:02,084 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1475951998, now seen corresponding path program 1 times [2021-12-17 23:31:02,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:02,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933368042] [2021-12-17 23:31:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:02,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:02,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:02,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:02,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 23:31:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 23:31:02,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 23:31:02,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:31:02,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:02,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933368042] [2021-12-17 23:31:02,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933368042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:02,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:02,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:31:02,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976325139] [2021-12-17 23:31:02,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:02,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:31:02,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:02,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:31:02,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:31:02,765 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 23:31:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:02,897 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2021-12-17 23:31:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:31:02,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2021-12-17 23:31:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:02,900 INFO L225 Difference]: With dead ends: 182 [2021-12-17 23:31:02,900 INFO L226 Difference]: Without dead ends: 109 [2021-12-17 23:31:02,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:31:02,901 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 35 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:31:02,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 423 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:31:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-17 23:31:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-12-17 23:31:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-17 23:31:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-12-17 23:31:02,910 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2021-12-17 23:31:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:02,910 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-12-17 23:31:02,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 23:31:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-12-17 23:31:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 23:31:02,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:02,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:31:02,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 23:31:03,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:03,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:03,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1492369144, now seen corresponding path program 1 times [2021-12-17 23:31:03,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:03,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808733812] [2021-12-17 23:31:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:03,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:03,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:03,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:03,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 23:31:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:03,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:31:03,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 23:31:03,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:31:03,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:03,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808733812] [2021-12-17 23:31:03,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808733812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:03,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:03,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:31:03,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933906045] [2021-12-17 23:31:03,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:03,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:31:03,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:31:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:31:03,872 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:31:03,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:03,928 INFO L93 Difference]: Finished difference Result 189 states and 231 transitions. [2021-12-17 23:31:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:31:03,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-17 23:31:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:03,931 INFO L225 Difference]: With dead ends: 189 [2021-12-17 23:31:03,931 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 23:31:03,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:31:03,932 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 10 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 377 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 [2021-12-17 23:31:03,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 377 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:31:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 23:31:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-12-17 23:31:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.2) internal successors, (90), 76 states have internal predecessors, (90), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-17 23:31:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-12-17 23:31:03,939 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 86 [2021-12-17 23:31:03,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:03,939 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-12-17 23:31:03,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:31:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-12-17 23:31:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 23:31:03,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:03,941 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:31:03,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:31:04,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:04,160 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:04,160 INFO L85 PathProgramCache]: Analyzing trace with hash 874325450, now seen corresponding path program 1 times [2021-12-17 23:31:04,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:04,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338280242] [2021-12-17 23:31:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:04,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:04,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:04,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:04,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 23:31:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 23:31:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 23:31:04,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:31:04,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338280242] [2021-12-17 23:31:04,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338280242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:04,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:04,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:31:04,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124351772] [2021-12-17 23:31:04,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:04,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:31:04,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:04,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:31:04,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:31:04,935 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:31:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:04,990 INFO L93 Difference]: Finished difference Result 193 states and 233 transitions. [2021-12-17 23:31:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 23:31:04,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-17 23:31:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:04,991 INFO L225 Difference]: With dead ends: 193 [2021-12-17 23:31:04,991 INFO L226 Difference]: Without dead ends: 116 [2021-12-17 23:31:04,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:31:04,992 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:31:04,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:31:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-17 23:31:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-12-17 23:31:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-12-17 23:31:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2021-12-17 23:31:04,998 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 86 [2021-12-17 23:31:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:04,999 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2021-12-17 23:31:04,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:31:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2021-12-17 23:31:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 23:31:05,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:05,000 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:31:05,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 23:31:05,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:05,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:05,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:05,224 INFO L85 PathProgramCache]: Analyzing trace with hash 261547704, now seen corresponding path program 1 times [2021-12-17 23:31:05,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:05,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922997648] [2021-12-17 23:31:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:05,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:05,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:05,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:05,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 23:31:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:05,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 23:31:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 23:31:06,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:31:06,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:06,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922997648] [2021-12-17 23:31:06,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922997648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:06,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:06,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:31:06,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563888166] [2021-12-17 23:31:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:06,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:31:06,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:06,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:31:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:31:06,009 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:31:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:06,039 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2021-12-17 23:31:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:31:06,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-12-17 23:31:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:06,040 INFO L225 Difference]: With dead ends: 160 [2021-12-17 23:31:06,040 INFO L226 Difference]: Without dead ends: 120 [2021-12-17 23:31:06,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:31:06,041 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 4 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:31:06,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 515 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:31:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-17 23:31:06,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2021-12-17 23:31:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 80 states have internal predecessors, (94), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-12-17 23:31:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2021-12-17 23:31:06,052 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 86 [2021-12-17 23:31:06,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:06,053 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2021-12-17 23:31:06,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 23:31:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2021-12-17 23:31:06,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 23:31:06,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:06,059 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:31:06,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:31:06,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:06,263 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2061885074, now seen corresponding path program 1 times [2021-12-17 23:31:06,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:06,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681587519] [2021-12-17 23:31:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:06,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:06,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:06,267 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:06,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 23:31:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:06,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 23:31:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 23:31:07,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:31:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 23:31:07,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:07,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681587519] [2021-12-17 23:31:07,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681587519] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:31:07,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:31:07,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-17 23:31:07,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744246423] [2021-12-17 23:31:07,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:31:07,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:31:07,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:31:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:31:07,328 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 23:31:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:07,511 INFO L93 Difference]: Finished difference Result 214 states and 262 transitions. [2021-12-17 23:31:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:31:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-12-17 23:31:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:07,513 INFO L225 Difference]: With dead ends: 214 [2021-12-17 23:31:07,513 INFO L226 Difference]: Without dead ends: 131 [2021-12-17 23:31:07,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:31:07,514 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 28 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:31:07,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 743 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:31:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-17 23:31:07,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-12-17 23:31:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 89 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2021-12-17 23:31:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 152 transitions. [2021-12-17 23:31:07,521 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 152 transitions. Word has length 89 [2021-12-17 23:31:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:07,521 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 152 transitions. [2021-12-17 23:31:07,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 23:31:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 152 transitions. [2021-12-17 23:31:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 23:31:07,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:07,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:31:07,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-17 23:31:07,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:07,744 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:07,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:07,744 INFO L85 PathProgramCache]: Analyzing trace with hash -932359201, now seen corresponding path program 1 times [2021-12-17 23:31:07,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:07,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632939943] [2021-12-17 23:31:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:07,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:07,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:07,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 23:31:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:08,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1336 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 23:31:08,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 23:31:08,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:31:08,576 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:08,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632939943] [2021-12-17 23:31:08,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632939943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:08,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:08,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:31:08,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473773533] [2021-12-17 23:31:08,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:08,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:31:08,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:31:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:31:08,578 INFO L87 Difference]: Start difference. First operand 125 states and 152 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 23:31:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:08,742 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2021-12-17 23:31:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:31:08,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 92 [2021-12-17 23:31:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:08,744 INFO L225 Difference]: With dead ends: 177 [2021-12-17 23:31:08,744 INFO L226 Difference]: Without dead ends: 123 [2021-12-17 23:31:08,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:31:08,744 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 46 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:31:08,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 515 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:31:08,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-17 23:31:08,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-12-17 23:31:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 87 states have internal predecessors, (104), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:31:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2021-12-17 23:31:08,760 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 92 [2021-12-17 23:31:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:08,760 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2021-12-17 23:31:08,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-17 23:31:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2021-12-17 23:31:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 23:31:08,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:08,761 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:31:08,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 23:31:08,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:08,962 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash -778390853, now seen corresponding path program 1 times [2021-12-17 23:31:08,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:08,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278676147] [2021-12-17 23:31:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:08,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:08,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:08,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 23:31:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 23:31:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:31:09,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:31:09,960 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:09,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278676147] [2021-12-17 23:31:09,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278676147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:31:09,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:31:09,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:31:09,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529594878] [2021-12-17 23:31:09,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:31:09,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:31:09,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:09,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:31:09,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:31:09,962 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 23:31:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:09,992 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-12-17 23:31:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 23:31:09,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 107 [2021-12-17 23:31:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:09,994 INFO L225 Difference]: With dead ends: 154 [2021-12-17 23:31:09,994 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 23:31:09,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:31:09,996 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:31:09,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 379 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:31:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 23:31:10,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-17 23:31:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 88 states have internal predecessors, (105), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:31:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2021-12-17 23:31:10,012 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 107 [2021-12-17 23:31:10,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:10,012 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2021-12-17 23:31:10,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 23:31:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2021-12-17 23:31:10,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 23:31:10,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:10,013 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 23:31:10,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 23:31:10,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:10,231 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash 99295452, now seen corresponding path program 1 times [2021-12-17 23:31:10,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:10,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043039656] [2021-12-17 23:31:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:31:10,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:10,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:10,234 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:10,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 23:31:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:31:11,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 23:31:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:31:11,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:31:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 23:31:11,477 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:11,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043039656] [2021-12-17 23:31:11,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043039656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:31:11,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:31:11,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-17 23:31:11,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772935966] [2021-12-17 23:31:11,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:31:11,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:31:11,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:11,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:31:11,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:31:11,478 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:31:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:11,569 INFO L93 Difference]: Finished difference Result 159 states and 192 transitions. [2021-12-17 23:31:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:31:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2021-12-17 23:31:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:11,570 INFO L225 Difference]: With dead ends: 159 [2021-12-17 23:31:11,570 INFO L226 Difference]: Without dead ends: 127 [2021-12-17 23:31:11,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:31:11,571 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 9 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 23:31:11,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 382 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 23:31:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-17 23:31:11,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-17 23:31:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 91 states have internal predecessors, (108), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:31:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-12-17 23:31:11,575 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 108 [2021-12-17 23:31:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:11,575 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-12-17 23:31:11,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:31:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-12-17 23:31:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 23:31:11,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:11,576 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-12-17 23:31:11,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 23:31:11,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:11,777 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1722436869, now seen corresponding path program 2 times [2021-12-17 23:31:11,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:11,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166389843] [2021-12-17 23:31:11,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:31:11,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:11,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:11,779 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:11,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 23:31:14,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:31:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:31:14,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 23:31:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:31:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:31:15,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:31:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 23:31:15,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:31:15,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166389843] [2021-12-17 23:31:15,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166389843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:31:15,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:31:15,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-17 23:31:15,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211668256] [2021-12-17 23:31:15,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:31:15,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 23:31:15,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:31:15,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 23:31:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:31:15,498 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:31:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:31:15,933 INFO L93 Difference]: Finished difference Result 165 states and 201 transitions. [2021-12-17 23:31:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 23:31:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-12-17 23:31:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:31:15,935 INFO L225 Difference]: With dead ends: 165 [2021-12-17 23:31:15,935 INFO L226 Difference]: Without dead ends: 133 [2021-12-17 23:31:15,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:31:15,936 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 30 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 23:31:15,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 760 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 23:31:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-17 23:31:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-17 23:31:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:31:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2021-12-17 23:31:15,943 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 111 [2021-12-17 23:31:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:31:15,944 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2021-12-17 23:31:15,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:31:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2021-12-17 23:31:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 23:31:15,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:31:15,946 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 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] [2021-12-17 23:31:15,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 23:31:16,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:31:16,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:31:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:31:16,173 INFO L85 PathProgramCache]: Analyzing trace with hash 699283291, now seen corresponding path program 3 times [2021-12-17 23:31:16,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:31:16,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896621631] [2021-12-17 23:31:16,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:31:16,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:31:16,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:31:16,176 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:31:16,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 23:34:42,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 23:34:42,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:34:43,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 23:34:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:34:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:34:44,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:34:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 23:34:45,121 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:34:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896621631] [2021-12-17 23:34:45,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896621631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:34:45,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:34:45,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-17 23:34:45,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257070382] [2021-12-17 23:34:45,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:34:45,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 23:34:45,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:34:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 23:34:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-12-17 23:34:45,123 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:34:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:34:49,269 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2021-12-17 23:34:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 23:34:49,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 117 [2021-12-17 23:34:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:34:49,272 INFO L225 Difference]: With dead ends: 177 [2021-12-17 23:34:49,272 INFO L226 Difference]: Without dead ends: 145 [2021-12-17 23:34:49,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=506, Invalid=900, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 23:34:49,273 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 111 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 23:34:49,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1495 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 23:34:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-17 23:34:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-17 23:34:49,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:34:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2021-12-17 23:34:49,289 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 117 [2021-12-17 23:34:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:34:49,289 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2021-12-17 23:34:49,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:34:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2021-12-17 23:34:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 23:34:49,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:34:49,291 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 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] [2021-12-17 23:34:49,511 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forcibly destroying the process [2021-12-17 23:34:49,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 23:34:49,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:34:49,550 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:34:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:34:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1908336667, now seen corresponding path program 4 times [2021-12-17 23:34:49,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:34:49,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879715066] [2021-12-17 23:34:49,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:34:49,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:34:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:34:49,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:34:49,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 23:34:50,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:34:50,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:34:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 23:34:50,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:34:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 5 proven. 253 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 23:34:51,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:34:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 23:34:53,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 23:34:53,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879715066] [2021-12-17 23:34:53,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879715066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:34:53,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:34:53,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-17 23:34:53,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205757880] [2021-12-17 23:34:53,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 23:34:53,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 23:34:53,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 23:34:53,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 23:34:53,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=1792, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 23:34:53,496 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:35:01,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 23:35:01,975 INFO L93 Difference]: Finished difference Result 195 states and 243 transitions. [2021-12-17 23:35:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 23:35:01,976 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-12-17 23:35:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 23:35:01,977 INFO L225 Difference]: With dead ends: 195 [2021-12-17 23:35:01,977 INFO L226 Difference]: Without dead ends: 163 [2021-12-17 23:35:01,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1406, Invalid=3016, Unknown=0, NotChecked=0, Total=4422 [2021-12-17 23:35:01,978 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 193 mSDsluCounter, 2901 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 23:35:01,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 3028 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 23:35:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-17 23:35:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-12-17 23:35:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 127 states have internal predecessors, (144), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-17 23:35:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2021-12-17 23:35:01,983 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 129 [2021-12-17 23:35:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 23:35:01,984 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2021-12-17 23:35:01,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 23:35:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2021-12-17 23:35:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 23:35:01,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 23:35:01,985 INFO L514 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 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] [2021-12-17 23:35:02,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-17 23:35:02,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 23:35:02,197 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 23:35:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:35:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1567692091, now seen corresponding path program 5 times [2021-12-17 23:35:02,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 23:35:02,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897119610] [2021-12-17 23:35:02,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 23:35:02,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 23:35:02,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 23:35:02,200 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 23:35:02,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process Killed by 15