./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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_byte_buf_secure_zero_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 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:15:12,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:15:12,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:15:12,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:15:12,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:15:12,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:15:12,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:15:12,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:15:12,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:15:12,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:15:12,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:15:12,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:15:12,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:15:12,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:15:12,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:15:12,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:15:12,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:15:12,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:15:12,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:15:12,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:15:12,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:15:12,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:15:12,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:15:12,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:15:12,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:15:12,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:15:12,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:15:12,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:15:12,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:15:12,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:15:12,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:15:12,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:15:12,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:15:12,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:15:12,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:15:12,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:15:12,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:15:12,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:15:12,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:15:12,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:15:12,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:15:12,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:15:12,992 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:15:12,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:15:12,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:15:12,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:15:12,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:15:12,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:15:12,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:15:12,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:15:12,996 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:15:12,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:15:12,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:15:12,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:15:12,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:15:12,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:15:12,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:15:12,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:15:12,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:15:12,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:15:12,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:15:12,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:15:12,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:15:12,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:15:12,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:15:12,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:15:13,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:15:13,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:15:13,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:15:13,005 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:15:13,005 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:15:13,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:15:13,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 [2021-12-28 03:15:13,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:15:13,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:15:13,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:15:13,363 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:15:13,363 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:15:13,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-12-28 03:15:13,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec70dbf52/e741edeb505249c0a336656fb28379df/FLAG2eaa1dd8f [2021-12-28 03:15:14,221 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:15:14,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-12-28 03:15:14,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec70dbf52/e741edeb505249c0a336656fb28379df/FLAG2eaa1dd8f [2021-12-28 03:15:14,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec70dbf52/e741edeb505249c0a336656fb28379df [2021-12-28 03:15:14,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:15:14,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:15:14,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:15:14,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:15:14,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:15:14,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:15:14" (1/1) ... [2021-12-28 03:15:14,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3ec69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:14, skipping insertion in model container [2021-12-28 03:15:14,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:15:14" (1/1) ... [2021-12-28 03:15:14,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:15:14,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:15:15,141 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_byte_buf_secure_zero_harness.i[4498,4511] [2021-12-28 03:15:15,149 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_byte_buf_secure_zero_harness.i[4558,4571] [2021-12-28 03:15:15,812 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:15,819 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:15,820 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:15,820 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:15,821 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:15,836 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:15,838 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:15,839 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:15,840 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,091 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:15:16,093 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:15:16,094 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:15:16,095 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:15:16,099 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:15:16,102 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:15:16,105 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:15:16,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:15:16,108 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:15:16,110 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:15:16,243 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:15:16,349 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,354 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:15:16,487 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:15:16,509 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_byte_buf_secure_zero_harness.i[4498,4511] [2021-12-28 03:15:16,510 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_byte_buf_secure_zero_harness.i[4558,4571] [2021-12-28 03:15:16,546 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,547 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,547 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,548 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,549 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,556 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,557 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,558 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,558 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,615 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-28 03:15:16,616 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-28 03:15:16,617 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-28 03:15:16,617 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-28 03:15:16,618 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-28 03:15:16,619 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-28 03:15:16,619 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-28 03:15:16,620 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-28 03:15:16,620 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-28 03:15:16,624 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-28 03:15:16,646 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-28 03:15:16,702 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,702 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-28 03:15:16,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:15:16,920 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:15:16,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16 WrapperNode [2021-12-28 03:15:16,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:15:16,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:15:16,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:15:16,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:15:16,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,174 INFO L137 Inliner]: procedures = 691, calls = 2614, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 796 [2021-12-28 03:15:17,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:15:17,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:15:17,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:15:17,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:15:17,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:15:17,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:15:17,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:15:17,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:15:17,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (1/1) ... [2021-12-28 03:15:17,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:15:17,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:17,337 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) [2021-12-28 03:15:17,361 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 [2021-12-28 03:15:17,377 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-28 03:15:17,378 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-28 03:15:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:15:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-28 03:15:17,378 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-28 03:15:17,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:15:17,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 03:15:17,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 03:15:17,379 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-12-28 03:15:17,379 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-12-28 03:15:17,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:15:17,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:15:17,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:15:17,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:15:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:15:17,381 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-28 03:15:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-28 03:15:17,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:15:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:15:17,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:15:17,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:15:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:15:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-28 03:15:17,382 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-28 03:15:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-28 03:15:17,382 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-28 03:15:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:15:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-28 03:15:17,383 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-28 03:15:17,383 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-28 03:15:17,383 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-28 03:15:17,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:15:17,573 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:15:17,585 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:15:18,563 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:15:18,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:15:18,571 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 03:15:18,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:15:18 BoogieIcfgContainer [2021-12-28 03:15:18,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:15:18,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:15:18,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:15:18,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:15:18,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:15:14" (1/3) ... [2021-12-28 03:15:18,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17436130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:15:18, skipping insertion in model container [2021-12-28 03:15:18,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:15:16" (2/3) ... [2021-12-28 03:15:18,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17436130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:15:18, skipping insertion in model container [2021-12-28 03:15:18,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:15:18" (3/3) ... [2021-12-28 03:15:18,581 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_secure_zero_harness.i [2021-12-28 03:15:18,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:15:18,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:15:18,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:15:18,653 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 [2021-12-28 03:15:18,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:15:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-28 03:15:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 03:15:18,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:18,684 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:18,685 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:18,693 INFO L85 PathProgramCache]: Analyzing trace with hash -70528239, now seen corresponding path program 1 times [2021-12-28 03:15:18,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:18,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445266358] [2021-12-28 03:15:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:18,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:15:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-28 03:15:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 03:15:19,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:19,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445266358] [2021-12-28 03:15:19,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445266358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:19,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:19,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:15:19,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373178181] [2021-12-28 03:15:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:19,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:15:19,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:15:19,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:15:19,388 INFO L87 Difference]: Start difference. First operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:19,539 INFO L93 Difference]: Finished difference Result 202 states and 265 transitions. [2021-12-28 03:15:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:15:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2021-12-28 03:15:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:19,552 INFO L225 Difference]: With dead ends: 202 [2021-12-28 03:15:19,553 INFO L226 Difference]: Without dead ends: 98 [2021-12-28 03:15:19,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:15:19,559 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:19,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 138 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-28 03:15:19,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-28 03:15:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.196969696969697) internal successors, (79), 67 states have internal predecessors, (79), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-28 03:15:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2021-12-28 03:15:19,600 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 65 [2021-12-28 03:15:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:19,600 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2021-12-28 03:15:19,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2021-12-28 03:15:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 03:15:19,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:19,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:19,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:15:19,605 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1061132297, now seen corresponding path program 1 times [2021-12-28 03:15:19,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:19,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274625973] [2021-12-28 03:15:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:19,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:15:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-28 03:15:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-28 03:15:19,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274625973] [2021-12-28 03:15:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274625973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388148566] [2021-12-28 03:15:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:19,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:19,958 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) [2021-12-28 03:15:20,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:15:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:20,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 03:15:20,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:15:20,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:20,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388148566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:20,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:20,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-28 03:15:20,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687005122] [2021-12-28 03:15:20,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:20,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:15:20,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:15:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:15:20,701 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 03:15:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:20,825 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2021-12-28 03:15:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:15:20,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2021-12-28 03:15:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:20,829 INFO L225 Difference]: With dead ends: 174 [2021-12-28 03:15:20,829 INFO L226 Difference]: Without dead ends: 101 [2021-12-28 03:15:20,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:15:20,831 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 140 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:20,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 276 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-28 03:15:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-28 03:15:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 21 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-12-28 03:15:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-12-28 03:15:20,860 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 65 [2021-12-28 03:15:20,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:20,861 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-12-28 03:15:20,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 03:15:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-12-28 03:15:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 03:15:20,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:20,869 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2021-12-28 03:15:20,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:21,092 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 [2021-12-28 03:15:21,092 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:21,093 INFO L85 PathProgramCache]: Analyzing trace with hash -883820620, now seen corresponding path program 1 times [2021-12-28 03:15:21,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:21,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333688714] [2021-12-28 03:15:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:21,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:15:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-28 03:15:21,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:21,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333688714] [2021-12-28 03:15:21,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333688714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:21,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131222944] [2021-12-28 03:15:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:21,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:21,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:21,611 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) [2021-12-28 03:15:21,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:15:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 03:15:22,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:15:22,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:22,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131222944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:22,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:22,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-12-28 03:15:22,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301725721] [2021-12-28 03:15:22,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:22,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:15:22,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:15:22,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-28 03:15:22,313 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-28 03:15:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:22,519 INFO L93 Difference]: Finished difference Result 172 states and 211 transitions. [2021-12-28 03:15:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:15:22,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2021-12-28 03:15:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:22,522 INFO L225 Difference]: With dead ends: 172 [2021-12-28 03:15:22,522 INFO L226 Difference]: Without dead ends: 98 [2021-12-28 03:15:22,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-12-28 03:15:22,524 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 150 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:22,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 428 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:15:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-28 03:15:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-28 03:15:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 67 states have internal predecessors, (78), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-28 03:15:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2021-12-28 03:15:22,540 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 71 [2021-12-28 03:15:22,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:22,541 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2021-12-28 03:15:22,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-28 03:15:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2021-12-28 03:15:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 03:15:22,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:22,546 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:22,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:22,762 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 [2021-12-28 03:15:22,762 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:22,763 INFO L85 PathProgramCache]: Analyzing trace with hash 81192906, now seen corresponding path program 1 times [2021-12-28 03:15:22,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:22,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006350496] [2021-12-28 03:15:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:22,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:22,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:15:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 03:15:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-28 03:15:23,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:23,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006350496] [2021-12-28 03:15:23,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006350496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:23,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:23,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:15:23,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916761789] [2021-12-28 03:15:23,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:23,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:15:23,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:15:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:15:23,088 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-28 03:15:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:23,598 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2021-12-28 03:15:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:15:23,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2021-12-28 03:15:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:23,601 INFO L225 Difference]: With dead ends: 110 [2021-12-28 03:15:23,601 INFO L226 Difference]: Without dead ends: 108 [2021-12-28 03:15:23,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:15:23,602 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 84 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:23,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 338 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:15:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-28 03:15:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-12-28 03:15:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-28 03:15:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2021-12-28 03:15:23,613 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 83 [2021-12-28 03:15:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:23,614 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2021-12-28 03:15:23,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-28 03:15:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2021-12-28 03:15:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-28 03:15:23,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:23,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-12-28 03:15:23,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:15:23,616 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1920648402, now seen corresponding path program 1 times [2021-12-28 03:15:23,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:23,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513896424] [2021-12-28 03:15:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:23,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:15:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:23,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 03:15:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 03:15:24,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:24,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513896424] [2021-12-28 03:15:24,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513896424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:24,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:24,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:15:24,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326047692] [2021-12-28 03:15:24,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:24,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:15:24,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:24,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:15:24,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:15:24,046 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:24,471 INFO L93 Difference]: Finished difference Result 214 states and 275 transitions. [2021-12-28 03:15:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:15:24,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-12-28 03:15:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:24,473 INFO L225 Difference]: With dead ends: 214 [2021-12-28 03:15:24,474 INFO L226 Difference]: Without dead ends: 132 [2021-12-28 03:15:24,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:15:24,475 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 126 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:24,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 245 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:15:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-28 03:15:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-12-28 03:15:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-28 03:15:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-12-28 03:15:24,490 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 87 [2021-12-28 03:15:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:24,491 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-12-28 03:15:24,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-12-28 03:15:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-28 03:15:24,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:24,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-12-28 03:15:24,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:15:24,497 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:24,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2116153456, now seen corresponding path program 1 times [2021-12-28 03:15:24,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:24,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77499206] [2021-12-28 03:15:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:24,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:24,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:15:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 03:15:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-28 03:15:25,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:25,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77499206] [2021-12-28 03:15:25,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77499206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266745433] [2021-12-28 03:15:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:25,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:25,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:25,086 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) [2021-12-28 03:15:25,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:15:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:25,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-28 03:15:25,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:25,683 INFO L387 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 11 treesize of output 7 [2021-12-28 03:15:25,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:15:26,004 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-28 03:15:26,004 INFO L387 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 24 treesize of output 1 [2021-12-28 03:15:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-28 03:15:26,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266745433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:26,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2021-12-28 03:15:26,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871784838] [2021-12-28 03:15:26,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:26,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:15:26,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:26,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:15:26,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:15:26,078 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-28 03:15:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:26,134 INFO L93 Difference]: Finished difference Result 222 states and 275 transitions. [2021-12-28 03:15:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:15:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 87 [2021-12-28 03:15:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:26,138 INFO L225 Difference]: With dead ends: 222 [2021-12-28 03:15:26,138 INFO L226 Difference]: Without dead ends: 131 [2021-12-28 03:15:26,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-28 03:15:26,141 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 25 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:26,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 824 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 99 Unchecked, 0.0s Time] [2021-12-28 03:15:26,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-28 03:15:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-28 03:15:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 95 states have (on average 1.2) internal successors, (114), 97 states have internal predecessors, (114), 22 states have call successors, (22), 12 states have call predecessors, (22), 13 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2021-12-28 03:15:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2021-12-28 03:15:26,159 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 87 [2021-12-28 03:15:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:26,159 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2021-12-28 03:15:26,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-28 03:15:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2021-12-28 03:15:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-28 03:15:26,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:26,161 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:15:26,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:26,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:26,376 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:26,376 INFO L85 PathProgramCache]: Analyzing trace with hash -729368046, now seen corresponding path program 1 times [2021-12-28 03:15:26,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:26,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354729694] [2021-12-28 03:15:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:26,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:15:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:15:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 03:15:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 03:15:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-28 03:15:26,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354729694] [2021-12-28 03:15:26,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354729694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706444006] [2021-12-28 03:15:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:26,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:26,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:26,578 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) [2021-12-28 03:15:26,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:15:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:26,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:15:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-28 03:15:27,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:27,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706444006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:27,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:27,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 03:15:27,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535248590] [2021-12-28 03:15:27,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:27,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:27,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:15:27,171 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:27,196 INFO L93 Difference]: Finished difference Result 231 states and 291 transitions. [2021-12-28 03:15:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-12-28 03:15:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:27,198 INFO L225 Difference]: With dead ends: 231 [2021-12-28 03:15:27,198 INFO L226 Difference]: Without dead ends: 140 [2021-12-28 03:15:27,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:15:27,199 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 20 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:27,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 349 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-28 03:15:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2021-12-28 03:15:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (24), 21 states have call predecessors, (24), 21 states have call successors, (24) [2021-12-28 03:15:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2021-12-28 03:15:27,209 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 87 [2021-12-28 03:15:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:27,209 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2021-12-28 03:15:27,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2021-12-28 03:15:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 03:15:27,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:27,211 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:27,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:27,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:27,428 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2043691690, now seen corresponding path program 2 times [2021-12-28 03:15:27,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:27,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278115404] [2021-12-28 03:15:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:27,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 03:15:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:15:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:15:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:15:27,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:27,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278115404] [2021-12-28 03:15:27,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278115404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:27,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576816202] [2021-12-28 03:15:27,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:15:27,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:27,734 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) [2021-12-28 03:15:27,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:15:28,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 03:15:28,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:15:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 2334 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-28 03:15:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:28,329 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-28 03:15:28,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-28 03:15:28,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 03:15:28,339 INFO L387 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 21 treesize of output 20 [2021-12-28 03:15:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-28 03:15:28,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:28,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576816202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:28,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:28,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2021-12-28 03:15:28,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611679691] [2021-12-28 03:15:28,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:28,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:15:28,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:28,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:15:28,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:15:28,789 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:29,032 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2021-12-28 03:15:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:15:29,033 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-28 03:15:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:29,034 INFO L225 Difference]: With dead ends: 226 [2021-12-28 03:15:29,034 INFO L226 Difference]: Without dead ends: 160 [2021-12-28 03:15:29,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-28 03:15:29,035 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 64 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:29,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 505 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 101 Unchecked, 0.0s Time] [2021-12-28 03:15:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-28 03:15:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-28 03:15:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 125 states have internal predecessors, (148), 23 states have call successors, (23), 13 states have call predecessors, (23), 14 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) [2021-12-28 03:15:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 197 transitions. [2021-12-28 03:15:29,044 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 197 transitions. Word has length 91 [2021-12-28 03:15:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:29,044 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 197 transitions. [2021-12-28 03:15:29,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 197 transitions. [2021-12-28 03:15:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 03:15:29,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:29,046 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 03:15:29,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:29,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:29,260 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash 971411928, now seen corresponding path program 2 times [2021-12-28 03:15:29,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:29,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171724517] [2021-12-28 03:15:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:29,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 03:15:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:15:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:15:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-28 03:15:29,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:29,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171724517] [2021-12-28 03:15:29,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171724517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:29,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:29,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:15:29,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166749869] [2021-12-28 03:15:29,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:29,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:15:29,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:29,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:15:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:15:29,527 INFO L87 Difference]: Start difference. First operand 160 states and 197 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:29,966 INFO L93 Difference]: Finished difference Result 259 states and 316 transitions. [2021-12-28 03:15:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:15:29,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-28 03:15:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:29,968 INFO L225 Difference]: With dead ends: 259 [2021-12-28 03:15:29,968 INFO L226 Difference]: Without dead ends: 187 [2021-12-28 03:15:29,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-28 03:15:29,969 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 136 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:29,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 272 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:15:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-28 03:15:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2021-12-28 03:15:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 134 states have internal predecessors, (157), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2021-12-28 03:15:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 209 transitions. [2021-12-28 03:15:29,978 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 209 transitions. Word has length 91 [2021-12-28 03:15:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:29,978 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 209 transitions. [2021-12-28 03:15:29,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 209 transitions. [2021-12-28 03:15:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 03:15:29,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:29,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-12-28 03:15:29,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 03:15:29,980 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -875101412, now seen corresponding path program 1 times [2021-12-28 03:15:29,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:29,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243827007] [2021-12-28 03:15:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:29,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 03:15:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 03:15:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:15:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 03:15:30,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:30,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243827007] [2021-12-28 03:15:30,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243827007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:30,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945388183] [2021-12-28 03:15:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:30,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:30,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:30,233 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) [2021-12-28 03:15:30,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:15:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:30,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 2531 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-28 03:15:30,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:30,971 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-28 03:15:30,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-28 03:15:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:15:31,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-28 03:15:31,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945388183] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:31,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:31,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2021-12-28 03:15:31,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975035898] [2021-12-28 03:15:31,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:31,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 03:15:31,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 03:15:31,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-12-28 03:15:31,794 INFO L87 Difference]: Start difference. First operand 169 states and 209 transitions. Second operand has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-28 03:15:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:33,230 INFO L93 Difference]: Finished difference Result 368 states and 465 transitions. [2021-12-28 03:15:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 03:15:33,230 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2021-12-28 03:15:33,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:33,234 INFO L225 Difference]: With dead ends: 368 [2021-12-28 03:15:33,235 INFO L226 Difference]: Without dead ends: 233 [2021-12-28 03:15:33,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 185 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1659, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 03:15:33,237 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 284 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:33,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 556 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1379 Invalid, 0 Unknown, 324 Unchecked, 0.9s Time] [2021-12-28 03:15:33,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-28 03:15:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 222. [2021-12-28 03:15:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 173 states have (on average 1.1734104046242775) internal successors, (203), 183 states have internal predecessors, (203), 25 states have call successors, (25), 15 states have call predecessors, (25), 23 states have return successors, (49), 23 states have call predecessors, (49), 24 states have call successors, (49) [2021-12-28 03:15:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 277 transitions. [2021-12-28 03:15:33,260 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 277 transitions. Word has length 91 [2021-12-28 03:15:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:33,260 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 277 transitions. [2021-12-28 03:15:33,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-28 03:15:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 277 transitions. [2021-12-28 03:15:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 03:15:33,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:33,262 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:33,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:33,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:33,472 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:33,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:33,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1597930877, now seen corresponding path program 1 times [2021-12-28 03:15:33,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:33,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732376073] [2021-12-28 03:15:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:33,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:15:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:15:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-28 03:15:33,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:33,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732376073] [2021-12-28 03:15:33,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732376073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:33,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269694749] [2021-12-28 03:15:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:33,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:33,676 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) [2021-12-28 03:15:33,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:15:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 2533 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:15:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 03:15:34,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:34,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269694749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:34,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:34,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 03:15:34,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511883002] [2021-12-28 03:15:34,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:34,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:34,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:34,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:15:34,238 INFO L87 Difference]: Start difference. First operand 222 states and 277 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:34,258 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2021-12-28 03:15:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-12-28 03:15:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:34,264 INFO L225 Difference]: With dead ends: 404 [2021-12-28 03:15:34,264 INFO L226 Difference]: Without dead ends: 207 [2021-12-28 03:15:34,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:15:34,265 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 9 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:34,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 342 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-28 03:15:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 198. [2021-12-28 03:15:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 152 states have (on average 1.144736842105263) internal successors, (174), 159 states have internal predecessors, (174), 25 states have call successors, (25), 15 states have call predecessors, (25), 20 states have return successors, (40), 23 states have call predecessors, (40), 24 states have call successors, (40) [2021-12-28 03:15:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2021-12-28 03:15:34,276 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 93 [2021-12-28 03:15:34,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:34,277 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2021-12-28 03:15:34,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2021-12-28 03:15:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 03:15:34,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:34,278 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:34,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:34,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:34,504 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:34,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1845910727, now seen corresponding path program 1 times [2021-12-28 03:15:34,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:34,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570596527] [2021-12-28 03:15:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:34,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:15:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:15:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 03:15:34,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570596527] [2021-12-28 03:15:34,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570596527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:34,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807523470] [2021-12-28 03:15:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:34,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:34,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:34,682 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) [2021-12-28 03:15:34,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:15:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:15:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-28 03:15:35,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:35,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807523470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:35,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:35,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 03:15:35,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967760523] [2021-12-28 03:15:35,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:35,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:15:35,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:35,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:15:35,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:15:35,248 INFO L87 Difference]: Start difference. First operand 198 states and 239 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:35,274 INFO L93 Difference]: Finished difference Result 350 states and 436 transitions. [2021-12-28 03:15:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:15:35,275 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-12-28 03:15:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:35,276 INFO L225 Difference]: With dead ends: 350 [2021-12-28 03:15:35,276 INFO L226 Difference]: Without dead ends: 182 [2021-12-28 03:15:35,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:15:35,278 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 34 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:35,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 340 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:15:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-28 03:15:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-12-28 03:15:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 136 states have (on average 1.125) internal successors, (153), 141 states have internal predecessors, (153), 25 states have call successors, (25), 15 states have call predecessors, (25), 18 states have return successors, (36), 23 states have call predecessors, (36), 24 states have call successors, (36) [2021-12-28 03:15:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2021-12-28 03:15:35,291 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 93 [2021-12-28 03:15:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:35,291 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2021-12-28 03:15:35,291 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 03:15:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2021-12-28 03:15:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-28 03:15:35,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:35,293 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-28 03:15:35,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:35,515 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,SelfDestructingSolverStorable11 [2021-12-28 03:15:35,515 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1337532371, now seen corresponding path program 1 times [2021-12-28 03:15:35,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:35,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370987113] [2021-12-28 03:15:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:35,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:15:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-28 03:15:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-28 03:15:35,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:35,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370987113] [2021-12-28 03:15:35,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370987113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:35,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12948989] [2021-12-28 03:15:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:35,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:35,809 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) [2021-12-28 03:15:35,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:15:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:36,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-28 03:15:36,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:36,376 INFO L387 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 13 treesize of output 9 [2021-12-28 03:15:36,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:15:36,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 03:15:36,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 11 [2021-12-28 03:15:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 03:15:36,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:36,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12948989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:36,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:36,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2021-12-28 03:15:36,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589690501] [2021-12-28 03:15:36,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:36,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:15:36,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:36,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:15:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:15:36,829 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-28 03:15:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:36,972 INFO L93 Difference]: Finished difference Result 367 states and 438 transitions. [2021-12-28 03:15:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 03:15:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 97 [2021-12-28 03:15:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:36,975 INFO L225 Difference]: With dead ends: 367 [2021-12-28 03:15:36,975 INFO L226 Difference]: Without dead ends: 248 [2021-12-28 03:15:36,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-12-28 03:15:36,976 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 22 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:36,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 909 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-12-28 03:15:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-28 03:15:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2021-12-28 03:15:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 179 states have (on average 1.1229050279329609) internal successors, (201), 185 states have internal predecessors, (201), 30 states have call successors, (30), 19 states have call predecessors, (30), 23 states have return successors, (47), 28 states have call predecessors, (47), 29 states have call successors, (47) [2021-12-28 03:15:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 278 transitions. [2021-12-28 03:15:36,987 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 278 transitions. Word has length 97 [2021-12-28 03:15:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:36,988 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 278 transitions. [2021-12-28 03:15:36,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-28 03:15:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 278 transitions. [2021-12-28 03:15:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-28 03:15:36,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:36,990 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-28 03:15:37,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:37,206 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,SelfDestructingSolverStorable12 [2021-12-28 03:15:37,206 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:37,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1898232149, now seen corresponding path program 1 times [2021-12-28 03:15:37,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:37,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135742715] [2021-12-28 03:15:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:37,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:15:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-28 03:15:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-28 03:15:37,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:37,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135742715] [2021-12-28 03:15:37,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135742715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:37,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113926020] [2021-12-28 03:15:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:37,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:37,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:37,515 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) [2021-12-28 03:15:37,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:15:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-28 03:15:37,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:38,036 INFO L387 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 13 treesize of output 9 [2021-12-28 03:15:38,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:15:38,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 03:15:38,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 11 [2021-12-28 03:15:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 03:15:38,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:38,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113926020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:38,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:38,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2021-12-28 03:15:38,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925280005] [2021-12-28 03:15:38,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:38,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:15:38,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:38,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:15:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:15:38,489 INFO L87 Difference]: Start difference. First operand 233 states and 278 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-28 03:15:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:38,591 INFO L93 Difference]: Finished difference Result 385 states and 441 transitions. [2021-12-28 03:15:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 03:15:38,592 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 97 [2021-12-28 03:15:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:38,594 INFO L225 Difference]: With dead ends: 385 [2021-12-28 03:15:38,594 INFO L226 Difference]: Without dead ends: 266 [2021-12-28 03:15:38,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-12-28 03:15:38,595 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 25 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:38,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 669 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-12-28 03:15:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-28 03:15:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 245. [2021-12-28 03:15:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 190 states have (on average 1.1157894736842104) internal successors, (212), 197 states have internal predecessors, (212), 29 states have call successors, (29), 20 states have call predecessors, (29), 25 states have return successors, (43), 27 states have call predecessors, (43), 28 states have call successors, (43) [2021-12-28 03:15:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 284 transitions. [2021-12-28 03:15:38,607 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 284 transitions. Word has length 97 [2021-12-28 03:15:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:38,608 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 284 transitions. [2021-12-28 03:15:38,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-28 03:15:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 284 transitions. [2021-12-28 03:15:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-28 03:15:38,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:38,610 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:38,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:38,830 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,SelfDestructingSolverStorable13 [2021-12-28 03:15:38,830 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:38,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2013780926, now seen corresponding path program 1 times [2021-12-28 03:15:38,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:38,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213341428] [2021-12-28 03:15:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:38,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:38,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:15:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:15:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:15:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-28 03:15:39,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:39,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213341428] [2021-12-28 03:15:39,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213341428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:39,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:39,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:15:39,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092669506] [2021-12-28 03:15:39,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:39,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:15:39,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:39,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:15:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:15:39,122 INFO L87 Difference]: Start difference. First operand 245 states and 284 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 03:15:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:39,659 INFO L93 Difference]: Finished difference Result 263 states and 303 transitions. [2021-12-28 03:15:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:15:39,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-12-28 03:15:39,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:39,661 INFO L225 Difference]: With dead ends: 263 [2021-12-28 03:15:39,661 INFO L226 Difference]: Without dead ends: 261 [2021-12-28 03:15:39,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:15:39,662 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 139 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:39,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 331 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:15:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-28 03:15:39,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 250. [2021-12-28 03:15:39,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 193 states have (on average 1.1139896373056994) internal successors, (215), 200 states have internal predecessors, (215), 30 states have call successors, (30), 21 states have call predecessors, (30), 26 states have return successors, (44), 28 states have call predecessors, (44), 29 states have call successors, (44) [2021-12-28 03:15:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 289 transitions. [2021-12-28 03:15:39,672 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 289 transitions. Word has length 109 [2021-12-28 03:15:39,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:39,672 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 289 transitions. [2021-12-28 03:15:39,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 03:15:39,673 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 289 transitions. [2021-12-28 03:15:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 03:15:39,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:39,674 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:39,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 03:15:39,674 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:39,675 INFO L85 PathProgramCache]: Analyzing trace with hash 920679761, now seen corresponding path program 1 times [2021-12-28 03:15:39,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:39,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574140035] [2021-12-28 03:15:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:39,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:39,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 03:15:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 03:15:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 03:15:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-28 03:15:40,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574140035] [2021-12-28 03:15:40,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574140035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018113607] [2021-12-28 03:15:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:40,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:40,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:40,221 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) [2021-12-28 03:15:40,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:15:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:40,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 2629 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-28 03:15:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:40,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:15:40,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 03:15:41,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-28 03:15:41,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-28 03:15:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 03:15:41,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:15:41,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018113607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:41,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:15:41,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2021-12-28 03:15:41,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441828985] [2021-12-28 03:15:41,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:41,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:15:41,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:15:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-12-28 03:15:41,151 INFO L87 Difference]: Start difference. First operand 250 states and 289 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 03:15:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:41,433 INFO L93 Difference]: Finished difference Result 367 states and 423 transitions. [2021-12-28 03:15:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:15:41,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 111 [2021-12-28 03:15:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:41,436 INFO L225 Difference]: With dead ends: 367 [2021-12-28 03:15:41,436 INFO L226 Difference]: Without dead ends: 257 [2021-12-28 03:15:41,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-12-28 03:15:41,437 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 51 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:41,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 686 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-12-28 03:15:41,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-28 03:15:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-12-28 03:15:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 198 states have (on average 1.1111111111111112) internal successors, (220), 204 states have internal predecessors, (220), 31 states have call successors, (31), 22 states have call predecessors, (31), 27 states have return successors, (44), 30 states have call predecessors, (44), 30 states have call successors, (44) [2021-12-28 03:15:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 295 transitions. [2021-12-28 03:15:41,451 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 295 transitions. Word has length 111 [2021-12-28 03:15:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:41,452 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 295 transitions. [2021-12-28 03:15:41,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 03:15:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 295 transitions. [2021-12-28 03:15:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 03:15:41,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:41,454 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:41,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:41,671 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,SelfDestructingSolverStorable15 [2021-12-28 03:15:41,671 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1859335804, now seen corresponding path program 1 times [2021-12-28 03:15:41,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:41,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117584558] [2021-12-28 03:15:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:41,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:41,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:41,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:41,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:41,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:41,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:41,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:41,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:15:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:15:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 03:15:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:15:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 03:15:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-28 03:15:42,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:42,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117584558] [2021-12-28 03:15:42,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117584558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:42,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475831512] [2021-12-28 03:15:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:42,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:42,218 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) [2021-12-28 03:15:42,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:15:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:42,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-28 03:15:42,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:42,777 INFO L387 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 13 treesize of output 9 [2021-12-28 03:15:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 03:15:43,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:43,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-28 03:15:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-28 03:15:43,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475831512] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:43,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:15:43,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14, 12] total 30 [2021-12-28 03:15:43,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371074533] [2021-12-28 03:15:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:43,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:15:43,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:15:43,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-12-28 03:15:43,639 INFO L87 Difference]: Start difference. First operand 257 states and 295 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-28 03:15:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:44,062 INFO L93 Difference]: Finished difference Result 341 states and 389 transitions. [2021-12-28 03:15:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:15:44,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 113 [2021-12-28 03:15:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:44,064 INFO L225 Difference]: With dead ends: 341 [2021-12-28 03:15:44,064 INFO L226 Difference]: Without dead ends: 241 [2021-12-28 03:15:44,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-12-28 03:15:44,065 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 70 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:44,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 324 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:15:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-28 03:15:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 184. [2021-12-28 03:15:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 139 states have (on average 1.1151079136690647) internal successors, (155), 144 states have internal predecessors, (155), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-28 03:15:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 210 transitions. [2021-12-28 03:15:44,076 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 210 transitions. Word has length 113 [2021-12-28 03:15:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:44,076 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 210 transitions. [2021-12-28 03:15:44,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-28 03:15:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 210 transitions. [2021-12-28 03:15:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-28 03:15:44,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:44,078 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:44,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 03:15:44,290 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,SelfDestructingSolverStorable16 [2021-12-28 03:15:44,291 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:44,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1216300311, now seen corresponding path program 1 times [2021-12-28 03:15:44,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:44,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941604354] [2021-12-28 03:15:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:44,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 03:15:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:15:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 03:15:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-28 03:15:44,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:44,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941604354] [2021-12-28 03:15:44,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941604354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:44,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173784825] [2021-12-28 03:15:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:44,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:44,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:44,572 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:15:44,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 03:15:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:45,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-28 03:15:45,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:45,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 03:15:45,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 03:15:45,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2021-12-28 03:15:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 03:15:45,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:15:46,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-28 03:15:46,356 INFO L353 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-28 03:15:46,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-28 03:15:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-28 03:15:46,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173784825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:15:46,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:15:46,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 13] total 32 [2021-12-28 03:15:46,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045732562] [2021-12-28 03:15:46,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:15:46,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-28 03:15:46,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:46,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-28 03:15:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2021-12-28 03:15:46,404 INFO L87 Difference]: Start difference. First operand 184 states and 210 transitions. Second operand has 32 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-28 03:15:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:48,956 INFO L93 Difference]: Finished difference Result 348 states and 401 transitions. [2021-12-28 03:15:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-28 03:15:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 115 [2021-12-28 03:15:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:48,958 INFO L225 Difference]: With dead ends: 348 [2021-12-28 03:15:48,958 INFO L226 Difference]: Without dead ends: 198 [2021-12-28 03:15:48,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 226 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=434, Invalid=4674, Unknown=4, NotChecked=0, Total=5112 [2021-12-28 03:15:48,960 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 278 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:48,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 1114 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2158 Invalid, 0 Unknown, 260 Unchecked, 1.3s Time] [2021-12-28 03:15:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-28 03:15:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2021-12-28 03:15:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 116 states have internal predecessors, (124), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2021-12-28 03:15:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2021-12-28 03:15:48,969 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 115 [2021-12-28 03:15:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:48,969 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2021-12-28 03:15:48,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 5.185185185185185) internal successors, (140), 27 states have internal predecessors, (140), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-28 03:15:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2021-12-28 03:15:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 03:15:48,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:48,971 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:48,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-28 03:15:49,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 03:15:49,183 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:49,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash -140184041, now seen corresponding path program 1 times [2021-12-28 03:15:49,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495324427] [2021-12-28 03:15:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:49,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:15:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 03:15:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 03:15:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-28 03:15:49,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:49,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495324427] [2021-12-28 03:15:49,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495324427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:15:49,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:15:49,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:15:49,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749612853] [2021-12-28 03:15:49,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:15:49,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:15:49,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:15:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:15:49,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:15:49,416 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:15:49,673 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2021-12-28 03:15:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:15:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2021-12-28 03:15:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:15:49,675 INFO L225 Difference]: With dead ends: 244 [2021-12-28 03:15:49,675 INFO L226 Difference]: Without dead ends: 156 [2021-12-28 03:15:49,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:15:49,676 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 99 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:15:49,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 158 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:15:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-28 03:15:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-12-28 03:15:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 117 states have internal predecessors, (125), 23 states have call successors, (23), 15 states have call predecessors, (23), 17 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2021-12-28 03:15:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2021-12-28 03:15:49,686 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 118 [2021-12-28 03:15:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:15:49,686 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2021-12-28 03:15:49,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 03:15:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2021-12-28 03:15:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-28 03:15:49,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:15:49,687 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:15:49,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 03:15:49,688 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:15:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:15:49,688 INFO L85 PathProgramCache]: Analyzing trace with hash 693312025, now seen corresponding path program 1 times [2021-12-28 03:15:49,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:15:49,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270903983] [2021-12-28 03:15:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:49,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:15:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:15:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:15:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:15:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 03:15:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:15:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:50,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:15:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:15:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 03:15:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:15:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 03:15:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-28 03:15:51,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:15:51,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270903983] [2021-12-28 03:15:51,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270903983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:15:51,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98987130] [2021-12-28 03:15:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:15:51,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:15:51,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:15:51,577 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:15:51,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 03:15:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:15:51,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-28 03:15:51,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:15:52,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 03:15:54,241 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_46| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_46|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_46|)) is different from true [2021-12-28 03:15:56,360 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_47| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_47|) 8) 1) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_47|)) is different from true [2021-12-28 03:15:58,491 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_21| Int)) (< (+ (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_21|) 8) 1) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_21|)) is different from true