./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_end_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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:06:10,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:06:10,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:06:10,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:06:10,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:06:10,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:06:10,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:06:10,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:06:10,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:06:10,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:06:10,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:06:10,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:06:10,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:06:10,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:06:10,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:06:10,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:06:10,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:06:10,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:06:10,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:06:10,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:06:10,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:06:10,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:06:10,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:06:10,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:06:10,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:06:10,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:06:10,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:06:10,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:06:10,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:06:10,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:06:10,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:06:10,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:06:10,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:06:10,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:06:10,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:06:10,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:06:10,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:06:10,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:06:10,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:06:10,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:06:10,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:06:10,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:06:10,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:06:10,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:06:10,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:06:10,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:06:10,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:06:10,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:06:10,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:06:10,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:06:10,935 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:06:10,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:06:10,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:06:10,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:06:10,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:06:10,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:06:10,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:06:10,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:06:10,937 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:06:10,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:06:10,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:06:10,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:06:10,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:06:10,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:06:10,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:06:10,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:06:10,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:06:10,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:06:10,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:06:10,939 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:06:10,940 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:06:10,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:06:10,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:06:10,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2021-12-14 17:06:11,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:06:11,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:06:11,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:06:11,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:06:11,196 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:06:11,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-12-14 17:06:11,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02ecd864c/39795d9d441f47ad954ebaff38b3149d/FLAG15eeb54ad [2021-12-14 17:06:11,950 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:06:11,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2021-12-14 17:06:11,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02ecd864c/39795d9d441f47ad954ebaff38b3149d/FLAG15eeb54ad [2021-12-14 17:06:12,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02ecd864c/39795d9d441f47ad954ebaff38b3149d [2021-12-14 17:06:12,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:06:12,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:06:12,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:06:12,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:06:12,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:06:12,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:06:12" (1/1) ... [2021-12-14 17:06:12,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7da24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:12, skipping insertion in model container [2021-12-14 17:06:12,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:06:12" (1/1) ... [2021-12-14 17:06:12,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:06:12,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:06:12,524 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_linked_list_end_harness.i[4493,4506] [2021-12-14 17:06:12,529 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_linked_list_end_harness.i[4553,4566] [2021-12-14 17:06:13,229 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,229 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,230 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,231 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,233 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,242 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,249 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,252 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,255 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,257 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,258 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,259 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,259 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,481 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:06:13,482 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:06:13,483 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:06:13,484 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:06:13,485 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:06:13,486 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:06:13,486 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:06:13,487 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:06:13,488 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:06:13,488 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:06:13,609 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:06:13,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:06:13,648 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:06:13,660 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_linked_list_end_harness.i[4493,4506] [2021-12-14 17:06:13,661 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_linked_list_end_harness.i[4553,4566] [2021-12-14 17:06:13,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,690 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,690 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,695 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,695 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,696 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,698 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,698 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,699 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:13,730 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:06:13,736 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:06:13,737 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:06:13,738 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:06:13,742 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:06:13,743 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:06:13,744 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:06:13,744 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:06:13,745 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:06:13,745 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:06:13,775 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:06:13,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:06:13,981 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:06:13,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13 WrapperNode [2021-12-14 17:06:13,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:06:13,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:06:13,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:06:13,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:06:13,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,111 INFO L137 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2021-12-14 17:06:14,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:06:14,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:06:14,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:06:14,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:06:14,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:06:14,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:06:14,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:06:14,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:06:14,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (1/1) ... [2021-12-14 17:06:14,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:06:14,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:14,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:06:14,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:06:14,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:06:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:06:14,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:06:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-14 17:06:14,270 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-14 17:06:14,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:06:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-14 17:06:14,271 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-14 17:06:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:06:14,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:06:14,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:06:14,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:06:14,273 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:06:14,273 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:06:14,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:06:14,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:06:14,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:06:14,274 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-14 17:06:14,274 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-14 17:06:14,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:06:14,542 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:06:14,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:06:14,755 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:06:14,760 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:06:14,761 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 17:06:14,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:06:14 BoogieIcfgContainer [2021-12-14 17:06:14,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:06:14,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:06:14,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:06:14,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:06:14,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:06:12" (1/3) ... [2021-12-14 17:06:14,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d52cdbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:06:14, skipping insertion in model container [2021-12-14 17:06:14,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:13" (2/3) ... [2021-12-14 17:06:14,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d52cdbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:06:14, skipping insertion in model container [2021-12-14 17:06:14,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:06:14" (3/3) ... [2021-12-14 17:06:14,770 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2021-12-14 17:06:14,775 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:06:14,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:06:14,825 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:06:14,840 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:06:14,844 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:06:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-14 17:06:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 17:06:14,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:14,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:06:14,871 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2021-12-14 17:06:14,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:14,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922673602] [2021-12-14 17:06:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:14,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:06:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:06:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:06:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:06:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 17:06:15,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:15,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922673602] [2021-12-14 17:06:15,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922673602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:15,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:06:15,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 17:06:15,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607345445] [2021-12-14 17:06:15,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:15,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 17:06:15,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 17:06:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 17:06:15,368 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:06:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:15,405 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2021-12-14 17:06:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 17:06:15,407 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-12-14 17:06:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:15,418 INFO L225 Difference]: With dead ends: 128 [2021-12-14 17:06:15,418 INFO L226 Difference]: Without dead ends: 63 [2021-12-14 17:06:15,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 17:06:15,426 INFO L933 BasicCegarLoop]: 87 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, 87 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 [2021-12-14 17:06:15,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:06:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-14 17:06:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-14 17:06:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-14 17:06:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2021-12-14 17:06:15,477 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2021-12-14 17:06:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:15,478 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2021-12-14 17:06:15,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:06:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2021-12-14 17:06:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 17:06:15,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:15,484 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:06:15,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:06:15,485 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:15,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:15,486 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2021-12-14 17:06:15,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:15,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986818805] [2021-12-14 17:06:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:15,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:06:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:06:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:06:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:06:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 17:06:15,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986818805] [2021-12-14 17:06:15,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986818805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926809069] [2021-12-14 17:06:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:15,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:15,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:15,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:15,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:06:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-14 17:06:16,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:16,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-14 17:06:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:16,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-14 17:06:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:16,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:16,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:16,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-14 17:06:16,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:16,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:16,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:16,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-14 17:06:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 17:06:16,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:16,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926809069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:16,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:16,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2021-12-14 17:06:16,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182821565] [2021-12-14 17:06:16,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:16,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:06:16,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:16,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:06:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:06:16,739 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 17:06:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:16,871 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2021-12-14 17:06:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:06:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-12-14 17:06:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:16,877 INFO L225 Difference]: With dead ends: 144 [2021-12-14 17:06:16,877 INFO L226 Difference]: Without dead ends: 93 [2021-12-14 17:06:16,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:06:16,881 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 32 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:16,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 282 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-12-14 17:06:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-14 17:06:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2021-12-14 17:06:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 60 states have internal predecessors, (77), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-14 17:06:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2021-12-14 17:06:16,908 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 68 [2021-12-14 17:06:16,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:16,908 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2021-12-14 17:06:16,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 17:06:16,908 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2021-12-14 17:06:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 17:06:16,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:16,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:16,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:17,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:17,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:17,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1148591220, now seen corresponding path program 1 times [2021-12-14 17:06:17,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:17,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831284689] [2021-12-14 17:06:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:17,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:17,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:17,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:17,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:17,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:06:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:17,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:06:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:17,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:06:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:17,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:06:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 17:06:17,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:17,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831284689] [2021-12-14 17:06:17,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831284689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:17,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574349920] [2021-12-14 17:06:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:17,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:17,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:17,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:06:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:17,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-14 17:06:17,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:17,565 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:06:17,566 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:06:17,579 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:06:17,580 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:06:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 17:06:18,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:06:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 17:06:19,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574349920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:06:19,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:06:19,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 12] total 28 [2021-12-14 17:06:19,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336651885] [2021-12-14 17:06:19,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:06:19,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 17:06:19,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:19,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 17:06:19,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-12-14 17:06:19,148 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-14 17:06:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:20,850 INFO L93 Difference]: Finished difference Result 246 states and 404 transitions. [2021-12-14 17:06:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-14 17:06:20,851 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 68 [2021-12-14 17:06:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:20,860 INFO L225 Difference]: With dead ends: 246 [2021-12-14 17:06:20,860 INFO L226 Difference]: Without dead ends: 192 [2021-12-14 17:06:20,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 127 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=439, Invalid=3221, Unknown=0, NotChecked=0, Total=3660 [2021-12-14 17:06:20,867 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 255 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:20,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1640 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1012 Invalid, 0 Unknown, 368 Unchecked, 0.9s Time] [2021-12-14 17:06:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-14 17:06:20,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 139. [2021-12-14 17:06:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 104 states have (on average 1.375) internal successors, (143), 110 states have internal predecessors, (143), 22 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (43), 20 states have call predecessors, (43), 21 states have call successors, (43) [2021-12-14 17:06:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 208 transitions. [2021-12-14 17:06:20,910 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 208 transitions. Word has length 68 [2021-12-14 17:06:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:20,911 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 208 transitions. [2021-12-14 17:06:20,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-12-14 17:06:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 208 transitions. [2021-12-14 17:06:20,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 17:06:20,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:20,921 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:20,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:21,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-14 17:06:21,134 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:21,134 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2021-12-14 17:06:21,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:21,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204029669] [2021-12-14 17:06:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:21,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:06:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 17:06:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:06:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:06:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 17:06:21,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:21,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204029669] [2021-12-14 17:06:21,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204029669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:21,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968970390] [2021-12-14 17:06:21,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:21,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:21,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:21,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:21,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:06:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 17:06:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 17:06:21,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:21,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968970390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:21,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:21,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-14 17:06:21,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111702962] [2021-12-14 17:06:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:21,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:06:21,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:21,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:06:21,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:06:21,576 INFO L87 Difference]: Start difference. First operand 139 states and 208 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:06:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:21,710 INFO L93 Difference]: Finished difference Result 259 states and 395 transitions. [2021-12-14 17:06:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:06:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-12-14 17:06:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:21,712 INFO L225 Difference]: With dead ends: 259 [2021-12-14 17:06:21,712 INFO L226 Difference]: Without dead ends: 150 [2021-12-14 17:06:21,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:06:21,714 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:21,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 245 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:06:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-14 17:06:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2021-12-14 17:06:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 116 states have internal predecessors, (147), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 21 states have call successors, (49) [2021-12-14 17:06:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 218 transitions. [2021-12-14 17:06:21,729 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 218 transitions. Word has length 70 [2021-12-14 17:06:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:21,730 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 218 transitions. [2021-12-14 17:06:21,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:06:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 218 transitions. [2021-12-14 17:06:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 17:06:21,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:21,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:21,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:21,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:21,944 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:21,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:21,944 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2021-12-14 17:06:21,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:21,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155711862] [2021-12-14 17:06:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:21,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:06:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:06:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:06:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:06:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 17:06:22,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:22,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155711862] [2021-12-14 17:06:22,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155711862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:22,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581677189] [2021-12-14 17:06:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:22,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:22,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:22,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:22,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:06:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:06:22,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 17:06:22,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:22,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581677189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:22,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:22,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-14 17:06:22,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133513646] [2021-12-14 17:06:22,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:22,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:06:22,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:22,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:06:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:06:22,399 INFO L87 Difference]: Start difference. First operand 145 states and 218 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:06:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:22,608 INFO L93 Difference]: Finished difference Result 299 states and 464 transitions. [2021-12-14 17:06:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:06:22,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-14 17:06:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:22,611 INFO L225 Difference]: With dead ends: 299 [2021-12-14 17:06:22,611 INFO L226 Difference]: Without dead ends: 184 [2021-12-14 17:06:22,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:06:22,612 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 142 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:22,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 291 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:06:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-14 17:06:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 149. [2021-12-14 17:06:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 112 states have (on average 1.3660714285714286) internal successors, (153), 120 states have internal predecessors, (153), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 21 states have call successors, (49) [2021-12-14 17:06:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 224 transitions. [2021-12-14 17:06:22,628 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 224 transitions. Word has length 72 [2021-12-14 17:06:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:22,628 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 224 transitions. [2021-12-14 17:06:22,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:06:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 224 transitions. [2021-12-14 17:06:22,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 17:06:22,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:22,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:22,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:22,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:22,850 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:22,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2021-12-14 17:06:22,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:22,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710090896] [2021-12-14 17:06:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:22,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 17:06:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 17:06:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:06:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:06:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 17:06:22,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710090896] [2021-12-14 17:06:22,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710090896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:22,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871104717] [2021-12-14 17:06:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:22,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:22,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:22,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:22,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:06:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 17:06:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-14 17:06:23,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:23,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871104717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:23,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:23,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-14 17:06:23,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543537713] [2021-12-14 17:06:23,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:23,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:06:23,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:23,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:06:23,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:06:23,224 INFO L87 Difference]: Start difference. First operand 149 states and 224 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:06:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:23,245 INFO L93 Difference]: Finished difference Result 294 states and 468 transitions. [2021-12-14 17:06:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:06:23,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-12-14 17:06:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:23,247 INFO L225 Difference]: With dead ends: 294 [2021-12-14 17:06:23,247 INFO L226 Difference]: Without dead ends: 175 [2021-12-14 17:06:23,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:06:23,249 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:23,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 161 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:06:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-14 17:06:23,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2021-12-14 17:06:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 114 states have (on average 1.3508771929824561) internal successors, (154), 122 states have internal predecessors, (154), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 21 states have call successors, (49) [2021-12-14 17:06:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 225 transitions. [2021-12-14 17:06:23,264 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 225 transitions. Word has length 73 [2021-12-14 17:06:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:23,264 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 225 transitions. [2021-12-14 17:06:23,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 17:06:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 225 transitions. [2021-12-14 17:06:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 17:06:23,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:23,266 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:23,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:23,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:23,480 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash -186702901, now seen corresponding path program 1 times [2021-12-14 17:06:23,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:23,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035040094] [2021-12-14 17:06:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:23,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:06:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:06:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:06:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:06:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:06:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:06:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-14 17:06:23,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:23,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035040094] [2021-12-14 17:06:23,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035040094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:23,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110444616] [2021-12-14 17:06:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:23,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:23,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:23,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:23,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:06:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 17:06:23,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:23,921 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:06:23,921 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:06:23,931 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:06:23,932 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:06:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 17:06:24,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:06:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:06:25,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110444616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:06:25,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:06:25,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 10] total 27 [2021-12-14 17:06:25,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806574779] [2021-12-14 17:06:25,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:06:25,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 17:06:25,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 17:06:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-12-14 17:06:25,497 INFO L87 Difference]: Start difference. First operand 151 states and 225 transitions. Second operand has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 24 states have internal predecessors, (121), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) [2021-12-14 17:06:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:26,281 INFO L93 Difference]: Finished difference Result 342 states and 517 transitions. [2021-12-14 17:06:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 17:06:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 24 states have internal predecessors, (121), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) Word has length 83 [2021-12-14 17:06:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:26,284 INFO L225 Difference]: With dead ends: 342 [2021-12-14 17:06:26,284 INFO L226 Difference]: Without dead ends: 221 [2021-12-14 17:06:26,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 17:06:26,286 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 100 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:26,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1388 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 557 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2021-12-14 17:06:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-14 17:06:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-12-14 17:06:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 144 states have internal predecessors, (181), 22 states have call successors, (22), 10 states have call predecessors, (22), 18 states have return successors, (54), 20 states have call predecessors, (54), 21 states have call successors, (54) [2021-12-14 17:06:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 257 transitions. [2021-12-14 17:06:26,310 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 257 transitions. Word has length 83 [2021-12-14 17:06:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:26,311 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 257 transitions. [2021-12-14 17:06:26,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 24 states have internal predecessors, (121), 10 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) [2021-12-14 17:06:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 257 transitions. [2021-12-14 17:06:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-14 17:06:26,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:26,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:26,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:26,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:26,536 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:26,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1220157194, now seen corresponding path program 1 times [2021-12-14 17:06:26,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:26,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059314988] [2021-12-14 17:06:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:26,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:06:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:06:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:06:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 17:06:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 17:06:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:06:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 17:06:26,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:26,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059314988] [2021-12-14 17:06:26,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059314988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:26,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806566417] [2021-12-14 17:06:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:26,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:26,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:26,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:26,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:06:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:26,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-14 17:06:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:26,974 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:06:26,975 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:06:26,985 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:06:26,985 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:06:27,972 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2021-12-14 17:06:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 17:06:28,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:06:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 17:06:28,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806566417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:06:28,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:06:28,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 18 [2021-12-14 17:06:28,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913437386] [2021-12-14 17:06:28,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:06:28,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 17:06:28,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:28,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 17:06:28,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2021-12-14 17:06:28,359 INFO L87 Difference]: Start difference. First operand 175 states and 257 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-14 17:06:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:28,877 INFO L93 Difference]: Finished difference Result 572 states and 935 transitions. [2021-12-14 17:06:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 17:06:28,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 85 [2021-12-14 17:06:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:28,881 INFO L225 Difference]: With dead ends: 572 [2021-12-14 17:06:28,881 INFO L226 Difference]: Without dead ends: 431 [2021-12-14 17:06:28,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=445, Unknown=1, NotChecked=44, Total=600 [2021-12-14 17:06:28,883 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 201 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:28,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 676 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 458 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2021-12-14 17:06:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-14 17:06:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 230. [2021-12-14 17:06:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 185 states have (on average 1.3837837837837839) internal successors, (256), 195 states have internal predecessors, (256), 25 states have call successors, (25), 11 states have call predecessors, (25), 19 states have return successors, (60), 23 states have call predecessors, (60), 24 states have call successors, (60) [2021-12-14 17:06:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 341 transitions. [2021-12-14 17:06:28,909 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 341 transitions. Word has length 85 [2021-12-14 17:06:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:28,909 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 341 transitions. [2021-12-14 17:06:28,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-14 17:06:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 341 transitions. [2021-12-14 17:06:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 17:06:28,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:28,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:28,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:29,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:29,128 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:29,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1281472374, now seen corresponding path program 1 times [2021-12-14 17:06:29,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:29,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415959389] [2021-12-14 17:06:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:29,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:06:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:06:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:06:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:06:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:06:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-14 17:06:29,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415959389] [2021-12-14 17:06:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415959389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895289491] [2021-12-14 17:06:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:29,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:29,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:29,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:29,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:06:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:06:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 17:06:29,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:29,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895289491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:29,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:29,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-14 17:06:29,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332646951] [2021-12-14 17:06:29,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:29,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:06:29,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:29,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:06:29,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:06:29,563 INFO L87 Difference]: Start difference. First operand 230 states and 341 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:06:29,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:29,597 INFO L93 Difference]: Finished difference Result 410 states and 647 transitions. [2021-12-14 17:06:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:06:29,597 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2021-12-14 17:06:29,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:29,599 INFO L225 Difference]: With dead ends: 410 [2021-12-14 17:06:29,599 INFO L226 Difference]: Without dead ends: 218 [2021-12-14 17:06:29,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:06:29,603 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:29,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 244 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:06:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-14 17:06:29,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2021-12-14 17:06:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 170 states have (on average 1.3470588235294119) internal successors, (229), 180 states have internal predecessors, (229), 25 states have call successors, (25), 11 states have call predecessors, (25), 19 states have return successors, (60), 23 states have call predecessors, (60), 24 states have call successors, (60) [2021-12-14 17:06:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 314 transitions. [2021-12-14 17:06:29,619 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 314 transitions. Word has length 83 [2021-12-14 17:06:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:29,619 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 314 transitions. [2021-12-14 17:06:29,620 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:06:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 314 transitions. [2021-12-14 17:06:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 17:06:29,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:29,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:29,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:29,846 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,SelfDestructingSolverStorable8 [2021-12-14 17:06:29,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1051920264, now seen corresponding path program 1 times [2021-12-14 17:06:29,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:29,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742184999] [2021-12-14 17:06:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:29,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:29,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:06:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:06:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 17:06:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 17:06:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:06:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-14 17:06:30,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:30,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742184999] [2021-12-14 17:06:30,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742184999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:30,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090704277] [2021-12-14 17:06:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:30,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:30,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:30,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:06:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:06:30,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 17:06:30,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:30,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090704277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:30,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:30,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-14 17:06:30,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032212359] [2021-12-14 17:06:30,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:30,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:06:30,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:06:30,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:06:30,330 INFO L87 Difference]: Start difference. First operand 215 states and 314 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:06:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:30,355 INFO L93 Difference]: Finished difference Result 323 states and 488 transitions. [2021-12-14 17:06:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:06:30,359 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2021-12-14 17:06:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:30,361 INFO L225 Difference]: With dead ends: 323 [2021-12-14 17:06:30,361 INFO L226 Difference]: Without dead ends: 136 [2021-12-14 17:06:30,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:06:30,362 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:30,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:06:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-14 17:06:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-12-14 17:06:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 104 states have internal predecessors, (121), 17 states have call successors, (17), 9 states have call predecessors, (17), 13 states have return successors, (29), 15 states have call predecessors, (29), 16 states have call successors, (29) [2021-12-14 17:06:30,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2021-12-14 17:06:30,380 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 83 [2021-12-14 17:06:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:30,380 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2021-12-14 17:06:30,381 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:06:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2021-12-14 17:06:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-14 17:06:30,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:30,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:30,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:30,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 17:06:30,592 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash 806524548, now seen corresponding path program 1 times [2021-12-14 17:06:30,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:30,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773370361] [2021-12-14 17:06:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:30,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:06:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:06:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:06:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:06:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 17:06:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:06:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-14 17:06:30,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:30,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773370361] [2021-12-14 17:06:30,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773370361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:30,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527526775] [2021-12-14 17:06:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:30,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:30,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:30,746 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:30,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:06:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:30,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-14 17:06:30,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:31,024 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-14 17:06:31,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:31,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 17:06:31,100 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-14 17:06:31,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 63 [2021-12-14 17:06:31,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:31,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-12-14 17:06:31,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-14 17:06:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:31,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-14 17:06:31,122 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 13 treesize of output 9 [2021-12-14 17:06:33,146 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_25| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_25|) 0) 1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_25|)) is different from true [2021-12-14 17:06:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 17:06:45,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:06:47,870 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_920 (Array Int Int)) (v_ArrVal_921 (Array Int Int)) (v_ArrVal_923 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_920) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_921) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_923)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|))) is different from false [2021-12-14 17:06:47,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:06:47,891 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-14 17:06:47,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:06:47,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 306 treesize of output 284 [2021-12-14 17:06:47,913 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 306 treesize of output 298 [2021-12-14 17:06:47,922 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 298 treesize of output 294 [2021-12-14 17:06:48,003 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 6 treesize of output 4 [2021-12-14 17:06:48,028 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 24 treesize of output 22 [2021-12-14 17:06:48,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:06:48,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 65 treesize of output 63 [2021-12-14 17:06:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 1 not checked. [2021-12-14 17:06:48,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527526775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:06:48,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:06:48,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 11] total 26 [2021-12-14 17:06:48,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357556502] [2021-12-14 17:06:48,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:06:48,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 17:06:48,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 17:06:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=488, Unknown=3, NotChecked=90, Total=650 [2021-12-14 17:06:48,228 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-14 17:06:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:57,297 INFO L93 Difference]: Finished difference Result 350 states and 516 transitions. [2021-12-14 17:06:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 17:06:57,298 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 86 [2021-12-14 17:06:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:57,299 INFO L225 Difference]: With dead ends: 350 [2021-12-14 17:06:57,299 INFO L226 Difference]: Without dead ends: 218 [2021-12-14 17:06:57,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=167, Invalid=1244, Unknown=3, NotChecked=146, Total=1560 [2021-12-14 17:06:57,301 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 146 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 814 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:57,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1379 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 904 Invalid, 0 Unknown, 814 Unchecked, 0.7s Time] [2021-12-14 17:06:57,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-14 17:06:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 180. [2021-12-14 17:06:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 138 states have (on average 1.2173913043478262) internal successors, (168), 144 states have internal predecessors, (168), 26 states have call successors, (26), 11 states have call predecessors, (26), 15 states have return successors, (48), 24 states have call predecessors, (48), 25 states have call successors, (48) [2021-12-14 17:06:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 242 transitions. [2021-12-14 17:06:57,319 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 242 transitions. Word has length 86 [2021-12-14 17:06:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:57,320 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 242 transitions. [2021-12-14 17:06:57,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-14 17:06:57,320 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 242 transitions. [2021-12-14 17:06:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 17:06:57,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:57,321 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 17:06:57,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:57,546 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,SelfDestructingSolverStorable10 [2021-12-14 17:06:57,547 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash -216003458, now seen corresponding path program 1 times [2021-12-14 17:06:57,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:57,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150059144] [2021-12-14 17:06:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:57,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:06:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:06:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:06:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:06:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:06:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:06:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-14 17:06:57,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150059144] [2021-12-14 17:06:57,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150059144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:57,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717058388] [2021-12-14 17:06:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:57,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:57,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:57,705 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:57,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:06:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 17:06:57,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 17:06:58,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:58,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717058388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:58,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:58,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-14 17:06:58,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895168402] [2021-12-14 17:06:58,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:58,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:06:58,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:06:58,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:06:58,078 INFO L87 Difference]: Start difference. First operand 180 states and 242 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 17:06:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:58,248 INFO L93 Difference]: Finished difference Result 282 states and 381 transitions. [2021-12-14 17:06:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:06:58,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 90 [2021-12-14 17:06:58,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:58,249 INFO L225 Difference]: With dead ends: 282 [2021-12-14 17:06:58,249 INFO L226 Difference]: Without dead ends: 177 [2021-12-14 17:06:58,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:06:58,250 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 107 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:58,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 295 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:06:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-14 17:06:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-12-14 17:06:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 136 states have (on average 1.213235294117647) internal successors, (165), 141 states have internal predecessors, (165), 26 states have call successors, (26), 11 states have call predecessors, (26), 14 states have return successors, (44), 24 states have call predecessors, (44), 25 states have call successors, (44) [2021-12-14 17:06:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 235 transitions. [2021-12-14 17:06:58,264 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 235 transitions. Word has length 90 [2021-12-14 17:06:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:58,264 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 235 transitions. [2021-12-14 17:06:58,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 17:06:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 235 transitions. [2021-12-14 17:06:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 17:06:58,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:58,267 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:06:58,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:58,481 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,SelfDestructingSolverStorable11 [2021-12-14 17:06:58,481 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:58,482 INFO L85 PathProgramCache]: Analyzing trace with hash -104570939, now seen corresponding path program 1 times [2021-12-14 17:06:58,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:58,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101735212] [2021-12-14 17:06:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:58,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:06:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:06:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:06:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:06:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:06:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:06:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:06:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-14 17:06:58,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101735212] [2021-12-14 17:06:58,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101735212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:58,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406530070] [2021-12-14 17:06:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:58,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:58,675 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:58,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:06:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-14 17:06:58,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:58,993 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-14 17:06:58,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:58,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 17:06:59,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:59,060 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:06:59,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 25 [2021-12-14 17:06:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:06:59,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-12-14 17:07:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 17:07:00,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:12,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:12,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-12-14 17:07:12,564 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_6 (Array Int Int)) (|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (v_ArrVal_1253 Int) (v_ArrVal_1247 (Array Int Int)) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13| Int)) (or (not (= (select v_arrayElimArr_6 |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13|) (not (= (+ 16 |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1247) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_13| v_arrayElimArr_6))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1253))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|))))) is different from false [2021-12-14 17:07:12,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:12,645 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2021-12-14 17:07:12,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:12,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4679 treesize of output 4613 [2021-12-14 17:07:12,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:12,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5071 treesize of output 4901 [2021-12-14 17:07:12,787 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 5846 treesize of output 5662 [2021-12-14 17:07:13,643 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 28 treesize of output 26 [2021-12-14 17:07:13,685 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 8 treesize of output 6 [2021-12-14 17:07:13,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:13,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 63 treesize of output 65 [2021-12-14 17:07:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 3 not checked. [2021-12-14 17:07:14,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406530070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:14,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:14,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 12] total 28 [2021-12-14 17:07:14,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005635706] [2021-12-14 17:07:14,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:14,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 17:07:14,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:14,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 17:07:14,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=614, Unknown=6, NotChecked=50, Total=756 [2021-12-14 17:07:14,013 INFO L87 Difference]: Start difference. First operand 177 states and 235 transitions. Second operand has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-14 17:07:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:15,628 INFO L93 Difference]: Finished difference Result 360 states and 511 transitions. [2021-12-14 17:07:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 17:07:15,629 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24) Word has length 101 [2021-12-14 17:07:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:15,631 INFO L225 Difference]: With dead ends: 360 [2021-12-14 17:07:15,631 INFO L226 Difference]: Without dead ends: 239 [2021-12-14 17:07:15,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=234, Invalid=1656, Unknown=6, NotChecked=84, Total=1980 [2021-12-14 17:07:15,632 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 143 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:15,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1180 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 606 Invalid, 0 Unknown, 288 Unchecked, 0.8s Time] [2021-12-14 17:07:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-14 17:07:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 202. [2021-12-14 17:07:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 158 states have (on average 1.2088607594936709) internal successors, (191), 163 states have internal predecessors, (191), 28 states have call successors, (28), 13 states have call predecessors, (28), 15 states have return successors, (42), 25 states have call predecessors, (42), 27 states have call successors, (42) [2021-12-14 17:07:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 261 transitions. [2021-12-14 17:07:15,649 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 261 transitions. Word has length 101 [2021-12-14 17:07:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:15,649 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 261 transitions. [2021-12-14 17:07:15,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 9 states have call successors, (25), 3 states have call predecessors, (25), 7 states have return successors, (24), 7 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-14 17:07:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 261 transitions. [2021-12-14 17:07:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-14 17:07:15,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:15,651 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:15,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:15,876 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,SelfDestructingSolverStorable12 [2021-12-14 17:07:15,876 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2047426688, now seen corresponding path program 1 times [2021-12-14 17:07:15,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:15,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4619476] [2021-12-14 17:07:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:15,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:07:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:07:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-14 17:07:16,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:16,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4619476] [2021-12-14 17:07:16,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4619476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:16,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:07:16,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:07:16,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203789225] [2021-12-14 17:07:16,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:16,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:07:16,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:07:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:07:16,295 INFO L87 Difference]: Start difference. First operand 202 states and 261 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8)