./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c36dfa3b 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_cursor_read_be32_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 065f95e1f01b1c2bb5cc332c26e118823e72d0e75cb3966f20aacf6dc1740b4a --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-03 22:52:42,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 22:52:42,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 22:52:42,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 22:52:42,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 22:52:42,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 22:52:42,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 22:52:42,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 22:52:42,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 22:52:42,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 22:52:42,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 22:52:42,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 22:52:42,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 22:52:42,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 22:52:42,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 22:52:42,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 22:52:42,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 22:52:42,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 22:52:42,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 22:52:42,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 22:52:42,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 22:52:42,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 22:52:42,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 22:52:42,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 22:52:42,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 22:52:42,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 22:52:42,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 22:52:42,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 22:52:42,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 22:52:42,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 22:52:42,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 22:52:42,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 22:52:42,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 22:52:42,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 22:52:42,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 22:52:42,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 22:52:42,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 22:52:42,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 22:52:42,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 22:52:42,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 22:52:42,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 22:52:42,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-03 22:52:43,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 22:52:43,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 22:52:43,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-03 22:52:43,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-03 22:52:43,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 22:52:43,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 22:52:43,029 INFO L138 SettingsManager]: * Use SBE=true [2021-11-03 22:52:43,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 22:52:43,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 22:52:43,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 22:52:43,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 22:52:43,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 22:52:43,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 22:52:43,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 22:52:43,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 22:52:43,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 22:52:43,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 22:52:43,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 22:52:43,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 22:52:43,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 22:52:43,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 22:52:43,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 22:52:43,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 22:52:43,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-03 22:52:43,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 22:52:43,033 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-03 22:52:43,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-03 22:52:43,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 22:52:43,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 22:52:43,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 065f95e1f01b1c2bb5cc332c26e118823e72d0e75cb3966f20aacf6dc1740b4a [2021-11-03 22:52:43,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 22:52:43,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 22:52:43,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 22:52:43,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 22:52:43,241 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 22:52:43,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i [2021-11-03 22:52:43,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57edf9f65/c98353b061f949e18fbdc19fb301a04c/FLAGd84d482c6 [2021-11-03 22:52:43,856 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 22:52:43,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i [2021-11-03 22:52:43,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57edf9f65/c98353b061f949e18fbdc19fb301a04c/FLAGd84d482c6 [2021-11-03 22:52:44,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57edf9f65/c98353b061f949e18fbdc19fb301a04c [2021-11-03 22:52:44,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 22:52:44,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 22:52:44,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 22:52:44,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 22:52:44,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 22:52:44,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 10:52:44" (1/1) ... [2021-11-03 22:52:44,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f350e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:44, skipping insertion in model container [2021-11-03 22:52:44,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 10:52:44" (1/1) ... [2021-11-03 22:52:44,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 22:52:44,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 22:52:44,626 WARN L228 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_cursor_read_be32_harness.i[4499,4512] [2021-11-03 22:52:44,635 WARN L228 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_cursor_read_be32_harness.i[4559,4572] [2021-11-03 22:52:44,654 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 22:52:44,659 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 22:52:45,291 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,291 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,291 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,293 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,293 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,303 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,310 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,313 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,314 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,553 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 22:52:45,553 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 22:52:45,555 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 22:52:45,556 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 22:52:45,558 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 22:52:45,558 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 22:52:45,559 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 22:52:45,559 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 22:52:45,560 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 22:52:45,560 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 22:52:45,662 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 22:52:45,743 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,744 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 22:52:45,889 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 22:52:45,898 WARN L228 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_cursor_read_be32_harness.i[4499,4512] [2021-11-03 22:52:45,899 WARN L228 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_cursor_read_be32_harness.i[4559,4572] [2021-11-03 22:52:45,900 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 22:52:45,900 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 22:52:45,916 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,917 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,917 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,917 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,918 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,920 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,922 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,922 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,923 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:45,949 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 22:52:45,949 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 22:52:45,950 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 22:52:45,952 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 22:52:45,952 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 22:52:45,953 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 22:52:45,953 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 22:52:45,953 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 22:52:45,953 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 22:52:45,955 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 22:52:45,977 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 22:52:46,008 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:46,011 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:52:46,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 22:52:46,213 INFO L208 MainTranslator]: Completed translation [2021-11-03 22:52:46,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46 WrapperNode [2021-11-03 22:52:46,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 22:52:46,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 22:52:46,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 22:52:46,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 22:52:46,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 22:52:46,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 22:52:46,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 22:52:46,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 22:52:46,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 22:52:46,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 22:52:46,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 22:52:46,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 22:52:46,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (1/1) ... [2021-11-03 22:52:46,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 22:52:46,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 22:52:46,524 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) [2021-11-03 22:52:46,547 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 [2021-11-03 22:52:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure ntohl [2021-11-03 22:52:46,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 22:52:46,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-03 22:52:46,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-03 22:52:46,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-03 22:52:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 22:52:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 22:52:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 22:52:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 22:52:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 22:52:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 22:52:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 22:52:46,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 22:52:46,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 22:52:46,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 22:52:46,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 22:52:46,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-03 22:52:46,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 22:52:51,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 22:52:51,483 INFO L299 CfgBuilder]: Removed 120 assume(true) statements. [2021-11-03 22:52:51,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 10:52:51 BoogieIcfgContainer [2021-11-03 22:52:51,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 22:52:51,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 22:52:51,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 22:52:51,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 22:52:51,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 10:52:44" (1/3) ... [2021-11-03 22:52:51,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78de4b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 10:52:51, skipping insertion in model container [2021-11-03 22:52:51,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:52:46" (2/3) ... [2021-11-03 22:52:51,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78de4b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 10:52:51, skipping insertion in model container [2021-11-03 22:52:51,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 10:52:51" (3/3) ... [2021-11-03 22:52:51,497 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_read_be32_harness.i [2021-11-03 22:52:51,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 22:52:51,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-03 22:52:51,555 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 22:52:51,561 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 [2021-11-03 22:52:51,561 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-03 22:52:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 223 states have (on average 1.4798206278026906) internal successors, (330), 237 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:52:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 22:52:51,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:52:51,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:52:51,589 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:52:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:52:51,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1601055385, now seen corresponding path program 1 times [2021-11-03 22:52:51,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:52:51,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523117333] [2021-11-03 22:52:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:52:51,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:52:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:52:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:52:52,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:52:52,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523117333] [2021-11-03 22:52:52,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523117333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:52:52,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:52:52,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 22:52:52,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556320215] [2021-11-03 22:52:52,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:52:52,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 22:52:52,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:52:52,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 22:52:52,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 22:52:52,257 INFO L87 Difference]: Start difference. First operand has 238 states, 223 states have (on average 1.4798206278026906) internal successors, (330), 237 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:52:54,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:52:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:52:55,954 INFO L93 Difference]: Finished difference Result 471 states and 653 transitions. [2021-11-03 22:52:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 22:52:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 22:52:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:52:55,965 INFO L225 Difference]: With dead ends: 471 [2021-11-03 22:52:55,966 INFO L226 Difference]: Without dead ends: 233 [2021-11-03 22:52:55,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 22:52:55,971 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3271.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3616.66ms IncrementalHoareTripleChecker+Time [2021-11-03 22:52:55,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 303 Unknown, 0 Unchecked, 5.29ms Time], IncrementalHoareTripleChecker [0 Valid, 302 Invalid, 1 Unknown, 0 Unchecked, 3616.66ms Time] [2021-11-03 22:52:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-03 22:52:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-03 22:52:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 219 states have (on average 1.360730593607306) internal successors, (298), 232 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:52:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 298 transitions. [2021-11-03 22:52:56,004 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 298 transitions. Word has length 54 [2021-11-03 22:52:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:52:56,005 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 298 transitions. [2021-11-03 22:52:56,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:52:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 298 transitions. [2021-11-03 22:52:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 22:52:56,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:52:56,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:52:56,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 22:52:56,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:52:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:52:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1113430879, now seen corresponding path program 1 times [2021-11-03 22:52:56,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:52:56,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996761302] [2021-11-03 22:52:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:52:56,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:52:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:52:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:52:56,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:52:56,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996761302] [2021-11-03 22:52:56,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996761302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:52:56,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:52:56,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 22:52:56,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870400009] [2021-11-03 22:52:56,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:52:56,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 22:52:56,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:52:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 22:52:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:52:56,313 INFO L87 Difference]: Start difference. First operand 233 states and 298 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:52:58,394 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:53:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:53:00,466 INFO L93 Difference]: Finished difference Result 441 states and 564 transitions. [2021-11-03 22:53:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 22:53:00,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 22:53:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:53:00,468 INFO L225 Difference]: With dead ends: 441 [2021-11-03 22:53:00,468 INFO L226 Difference]: Without dead ends: 233 [2021-11-03 22:53:00,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.00ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:53:00,470 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 399 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3818.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.78ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4083.71ms IncrementalHoareTripleChecker+Time [2021-11-03 22:53:00,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 0 Invalid, 477 Unknown, 0 Unchecked, 15.78ms Time], IncrementalHoareTripleChecker [11 Valid, 465 Invalid, 1 Unknown, 0 Unchecked, 4083.71ms Time] [2021-11-03 22:53:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-03 22:53:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-03 22:53:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 219 states have (on average 1.3470319634703196) internal successors, (295), 232 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 295 transitions. [2021-11-03 22:53:00,482 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 295 transitions. Word has length 54 [2021-11-03 22:53:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:53:00,483 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 295 transitions. [2021-11-03 22:53:00,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 295 transitions. [2021-11-03 22:53:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 22:53:00,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:53:00,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:53:00,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 22:53:00,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:53:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:53:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1476329313, now seen corresponding path program 1 times [2021-11-03 22:53:00,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:53:00,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630004796] [2021-11-03 22:53:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:00,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:53:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:53:00,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:53:00,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630004796] [2021-11-03 22:53:00,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630004796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:53:00,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:53:00,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 22:53:00,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411266074] [2021-11-03 22:53:00,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:53:00,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 22:53:00,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:53:00,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 22:53:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 22:53:00,785 INFO L87 Difference]: Start difference. First operand 233 states and 295 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:02,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:53:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:53:05,030 INFO L93 Difference]: Finished difference Result 426 states and 543 transitions. [2021-11-03 22:53:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 22:53:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 22:53:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:53:05,032 INFO L225 Difference]: With dead ends: 426 [2021-11-03 22:53:05,032 INFO L226 Difference]: Without dead ends: 234 [2021-11-03 22:53:05,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.79ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 22:53:05,035 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3891.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.85ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4196.77ms IncrementalHoareTripleChecker+Time [2021-11-03 22:53:05,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 588 Unknown, 0 Unchecked, 6.85ms Time], IncrementalHoareTripleChecker [0 Valid, 587 Invalid, 1 Unknown, 0 Unchecked, 4196.77ms Time] [2021-11-03 22:53:05,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-03 22:53:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-11-03 22:53:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 220 states have (on average 1.3454545454545455) internal successors, (296), 233 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 296 transitions. [2021-11-03 22:53:05,045 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 296 transitions. Word has length 58 [2021-11-03 22:53:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:53:05,046 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 296 transitions. [2021-11-03 22:53:05,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 296 transitions. [2021-11-03 22:53:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 22:53:05,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:53:05,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:53:05,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 22:53:05,048 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:53:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:53:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -781844374, now seen corresponding path program 1 times [2021-11-03 22:53:05,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:53:05,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228156414] [2021-11-03 22:53:05,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:05,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:53:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 22:53:05,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:53:05,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228156414] [2021-11-03 22:53:05,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228156414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:53:05,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:53:05,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 22:53:05,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934998285] [2021-11-03 22:53:05,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:53:05,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 22:53:05,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:53:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 22:53:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:53:05,288 INFO L87 Difference]: Start difference. First operand 234 states and 296 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:07,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:53:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:53:10,120 INFO L93 Difference]: Finished difference Result 499 states and 629 transitions. [2021-11-03 22:53:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 22:53:10,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 22:53:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:53:10,121 INFO L225 Difference]: With dead ends: 499 [2021-11-03 22:53:10,121 INFO L226 Difference]: Without dead ends: 308 [2021-11-03 22:53:10,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.49ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:53:10,122 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 217 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4493.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4758.55ms IncrementalHoareTripleChecker+Time [2021-11-03 22:53:10,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 0 Invalid, 751 Unknown, 0 Unchecked, 14.62ms Time], IncrementalHoareTripleChecker [1 Valid, 749 Invalid, 1 Unknown, 0 Unchecked, 4758.55ms Time] [2021-11-03 22:53:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-03 22:53:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-11-03 22:53:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 221 states have (on average 1.3438914027149322) internal successors, (297), 234 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 297 transitions. [2021-11-03 22:53:10,130 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 297 transitions. Word has length 59 [2021-11-03 22:53:10,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:53:10,131 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 297 transitions. [2021-11-03 22:53:10,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 297 transitions. [2021-11-03 22:53:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 22:53:10,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:53:10,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:53:10,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 22:53:10,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:53:10,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:53:10,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1178563137, now seen corresponding path program 1 times [2021-11-03 22:53:10,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:53:10,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4165226] [2021-11-03 22:53:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:10,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:53:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 22:53:10,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:53:10,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4165226] [2021-11-03 22:53:10,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4165226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:53:10,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:53:10,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 22:53:10,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060826741] [2021-11-03 22:53:10,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:53:10,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 22:53:10,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:53:10,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 22:53:10,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:53:10,465 INFO L87 Difference]: Start difference. First operand 235 states and 297 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:12,507 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:53:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:53:14,651 INFO L93 Difference]: Finished difference Result 400 states and 506 transitions. [2021-11-03 22:53:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 22:53:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 22:53:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:53:14,653 INFO L225 Difference]: With dead ends: 400 [2021-11-03 22:53:14,653 INFO L226 Difference]: Without dead ends: 235 [2021-11-03 22:53:14,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 119.38ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:53:14,654 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 610 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3759.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.09ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4058.50ms IncrementalHoareTripleChecker+Time [2021-11-03 22:53:14,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 0 Invalid, 521 Unknown, 0 Unchecked, 11.09ms Time], IncrementalHoareTripleChecker [10 Valid, 510 Invalid, 1 Unknown, 0 Unchecked, 4058.50ms Time] [2021-11-03 22:53:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-03 22:53:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-11-03 22:53:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 221 states have (on average 1.334841628959276) internal successors, (295), 234 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 295 transitions. [2021-11-03 22:53:14,660 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 295 transitions. Word has length 60 [2021-11-03 22:53:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:53:14,661 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 295 transitions. [2021-11-03 22:53:14,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 295 transitions. [2021-11-03 22:53:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 22:53:14,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:53:14,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:53:14,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 22:53:14,662 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:53:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:53:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash -424057434, now seen corresponding path program 1 times [2021-11-03 22:53:14,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:53:14,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080068941] [2021-11-03 22:53:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:14,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:53:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 22:53:14,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:53:14,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080068941] [2021-11-03 22:53:14,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080068941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:53:14,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:53:14,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 22:53:14,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592959365] [2021-11-03 22:53:14,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:53:14,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 22:53:14,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:53:14,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 22:53:14,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 22:53:14,960 INFO L87 Difference]: Start difference. First operand 235 states and 295 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:17,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:53:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:53:19,652 INFO L93 Difference]: Finished difference Result 385 states and 483 transitions. [2021-11-03 22:53:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 22:53:19,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 22:53:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:53:19,654 INFO L225 Difference]: With dead ends: 385 [2021-11-03 22:53:19,654 INFO L226 Difference]: Without dead ends: 235 [2021-11-03 22:53:19,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 239.86ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 22:53:19,655 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 817 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4149.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.18ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4474.06ms IncrementalHoareTripleChecker+Time [2021-11-03 22:53:19,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 0 Invalid, 583 Unknown, 0 Unchecked, 11.18ms Time], IncrementalHoareTripleChecker [11 Valid, 571 Invalid, 1 Unknown, 0 Unchecked, 4474.06ms Time] [2021-11-03 22:53:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-03 22:53:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-11-03 22:53:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 221 states have (on average 1.3212669683257918) internal successors, (292), 234 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2021-11-03 22:53:19,660 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 62 [2021-11-03 22:53:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:53:19,661 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2021-11-03 22:53:19,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2021-11-03 22:53:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 22:53:19,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:53:19,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:53:19,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 22:53:19,663 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:53:19,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:53:19,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2114750081, now seen corresponding path program 1 times [2021-11-03 22:53:19,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:53:19,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094834761] [2021-11-03 22:53:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:19,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:53:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 22:53:20,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:53:20,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094834761] [2021-11-03 22:53:20,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094834761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:53:20,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:53:20,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 22:53:20,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892927672] [2021-11-03 22:53:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:53:20,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 22:53:20,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:53:20,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 22:53:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 22:53:20,087 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:22,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:53:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:53:25,038 INFO L93 Difference]: Finished difference Result 368 states and 454 transitions. [2021-11-03 22:53:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 22:53:25,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 22:53:25,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:53:25,040 INFO L225 Difference]: With dead ends: 368 [2021-11-03 22:53:25,040 INFO L226 Difference]: Without dead ends: 235 [2021-11-03 22:53:25,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 377.12ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-03 22:53:25,041 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1004 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4315.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.78ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4636.51ms IncrementalHoareTripleChecker+Time [2021-11-03 22:53:25,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 0 Invalid, 667 Unknown, 0 Unchecked, 9.78ms Time], IncrementalHoareTripleChecker [9 Valid, 657 Invalid, 1 Unknown, 0 Unchecked, 4636.51ms Time] [2021-11-03 22:53:25,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-03 22:53:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-11-03 22:53:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 221 states have (on average 1.3167420814479638) internal successors, (291), 234 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 291 transitions. [2021-11-03 22:53:25,047 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 291 transitions. Word has length 64 [2021-11-03 22:53:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:53:25,048 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 291 transitions. [2021-11-03 22:53:25,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 291 transitions. [2021-11-03 22:53:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 22:53:25,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:53:25,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:53:25,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 22:53:25,049 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:53:25,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:53:25,050 INFO L85 PathProgramCache]: Analyzing trace with hash -935938244, now seen corresponding path program 1 times [2021-11-03 22:53:25,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:53:25,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122634328] [2021-11-03 22:53:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:25,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:53:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 22:53:25,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:53:25,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122634328] [2021-11-03 22:53:25,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122634328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:53:25,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:53:25,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 22:53:25,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570018390] [2021-11-03 22:53:25,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:53:25,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 22:53:25,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:53:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 22:53:25,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-03 22:53:25,457 INFO L87 Difference]: Start difference. First operand 235 states and 291 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:27,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:53:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:53:32,856 INFO L93 Difference]: Finished difference Result 538 states and 664 transitions. [2021-11-03 22:53:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 22:53:32,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 22:53:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:53:32,858 INFO L225 Difference]: With dead ends: 538 [2021-11-03 22:53:32,858 INFO L226 Difference]: Without dead ends: 393 [2021-11-03 22:53:32,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 424.45ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 22:53:32,859 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 630 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6586.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.82ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7037.12ms IncrementalHoareTripleChecker+Time [2021-11-03 22:53:32,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 0 Invalid, 1489 Unknown, 0 Unchecked, 15.82ms Time], IncrementalHoareTripleChecker [13 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 7037.12ms Time] [2021-11-03 22:53:32,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-03 22:53:32,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 242. [2021-11-03 22:53:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 228 states have (on average 1.3070175438596492) internal successors, (298), 241 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 298 transitions. [2021-11-03 22:53:32,865 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 298 transitions. Word has length 66 [2021-11-03 22:53:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:53:32,865 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 298 transitions. [2021-11-03 22:53:32,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 298 transitions. [2021-11-03 22:53:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 22:53:32,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:53:32,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:53:32,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 22:53:32,867 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:53:32,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:53:32,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1328965254, now seen corresponding path program 1 times [2021-11-03 22:53:32,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:53:32,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992466321] [2021-11-03 22:53:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:32,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:53:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 22:53:33,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:53:33,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992466321] [2021-11-03 22:53:33,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992466321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 22:53:33,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924471691] [2021-11-03 22:53:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:33,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 22:53:33,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 22:53:33,228 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) [2021-11-03 22:53:33,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 22:53:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:33,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 3030 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 22:53:33,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:53:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 22:53:34,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:53:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 22:53:34,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924471691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 22:53:34,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 22:53:34,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-03 22:53:34,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453180431] [2021-11-03 22:53:34,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-03 22:53:34,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 22:53:34,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:53:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 22:53:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:53:34,506 INFO L87 Difference]: Start difference. First operand 242 states and 298 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:36,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:53:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:53:40,519 INFO L93 Difference]: Finished difference Result 445 states and 552 transitions. [2021-11-03 22:53:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 22:53:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 22:53:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:53:40,520 INFO L225 Difference]: With dead ends: 445 [2021-11-03 22:53:40,520 INFO L226 Difference]: Without dead ends: 245 [2021-11-03 22:53:40,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 168.95ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:53:40,521 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5545.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.12ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5948.12ms IncrementalHoareTripleChecker+Time [2021-11-03 22:53:40,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 869 Unknown, 0 Unchecked, 7.12ms Time], IncrementalHoareTripleChecker [4 Valid, 864 Invalid, 1 Unknown, 0 Unchecked, 5948.12ms Time] [2021-11-03 22:53:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-03 22:53:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-11-03 22:53:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 231 states have (on average 1.303030303030303) internal successors, (301), 244 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 301 transitions. [2021-11-03 22:53:40,527 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 301 transitions. Word has length 66 [2021-11-03 22:53:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:53:40,528 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 301 transitions. [2021-11-03 22:53:40,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 301 transitions. [2021-11-03 22:53:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 22:53:40,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:53:40,529 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:53:40,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-03 22:53:40,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 22:53:40,742 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:53:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:53:40,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1814679323, now seen corresponding path program 2 times [2021-11-03 22:53:40,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:53:40,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142385236] [2021-11-03 22:53:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:40,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:53:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:53:41,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:53:41,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142385236] [2021-11-03 22:53:41,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142385236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:53:41,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:53:41,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 22:53:41,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706269983] [2021-11-03 22:53:41,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:53:41,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 22:53:41,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:53:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 22:53:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 22:53:41,360 INFO L87 Difference]: Start difference. First operand 245 states and 301 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:43,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:53:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:53:49,190 INFO L93 Difference]: Finished difference Result 440 states and 525 transitions. [2021-11-03 22:53:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 22:53:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 22:53:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:53:49,192 INFO L225 Difference]: With dead ends: 440 [2021-11-03 22:53:49,192 INFO L226 Difference]: Without dead ends: 424 [2021-11-03 22:53:49,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 290.15ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 22:53:49,193 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 322 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7090.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.61ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7585.31ms IncrementalHoareTripleChecker+Time [2021-11-03 22:53:49,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 0 Invalid, 1529 Unknown, 0 Unchecked, 11.61ms Time], IncrementalHoareTripleChecker [78 Valid, 1450 Invalid, 1 Unknown, 0 Unchecked, 7585.31ms Time] [2021-11-03 22:53:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-03 22:53:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 265. [2021-11-03 22:53:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 251 states have (on average 1.2749003984063745) internal successors, (320), 264 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 320 transitions. [2021-11-03 22:53:49,200 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 320 transitions. Word has length 69 [2021-11-03 22:53:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:53:49,200 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 320 transitions. [2021-11-03 22:53:49,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 320 transitions. [2021-11-03 22:53:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 22:53:49,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:53:49,202 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:53:49,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 22:53:49,202 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:53:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:53:49,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2076755101, now seen corresponding path program 1 times [2021-11-03 22:53:49,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:53:49,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637159878] [2021-11-03 22:53:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:53:49,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:53:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:53:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:53:50,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:53:50,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637159878] [2021-11-03 22:53:50,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637159878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:53:50,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:53:50,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-03 22:53:50,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292637809] [2021-11-03 22:53:50,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:53:50,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 22:53:50,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:53:50,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 22:53:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-03 22:53:50,147 INFO L87 Difference]: Start difference. First operand 265 states and 320 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:53:52,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:54:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:54:02,937 INFO L93 Difference]: Finished difference Result 672 states and 805 transitions. [2021-11-03 22:54:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 22:54:02,937 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 22:54:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:54:02,940 INFO L225 Difference]: With dead ends: 672 [2021-11-03 22:54:02,940 INFO L226 Difference]: Without dead ends: 473 [2021-11-03 22:54:02,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2333.61ms TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 22:54:02,941 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 975 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 2735 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10187.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.29ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2735 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10777.69ms IncrementalHoareTripleChecker+Time [2021-11-03 22:54:02,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 0 Invalid, 2796 Unknown, 0 Unchecked, 24.29ms Time], IncrementalHoareTripleChecker [60 Valid, 2735 Invalid, 1 Unknown, 0 Unchecked, 10777.69ms Time] [2021-11-03 22:54:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-03 22:54:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 293. [2021-11-03 22:54:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 279 states have (on average 1.2473118279569892) internal successors, (348), 292 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 348 transitions. [2021-11-03 22:54:02,951 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 348 transitions. Word has length 73 [2021-11-03 22:54:02,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:54:02,951 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 348 transitions. [2021-11-03 22:54:02,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 348 transitions. [2021-11-03 22:54:02,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 22:54:02,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:54:02,952 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:54:02,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 22:54:02,953 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:54:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:54:02,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1023505992, now seen corresponding path program 1 times [2021-11-03 22:54:02,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:54:02,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411639122] [2021-11-03 22:54:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:54:02,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:54:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:54:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:54:03,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:54:03,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411639122] [2021-11-03 22:54:03,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411639122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:54:03,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:54:03,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 22:54:03,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636479839] [2021-11-03 22:54:03,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:54:03,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 22:54:03,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:54:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 22:54:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:54:03,187 INFO L87 Difference]: Start difference. First operand 293 states and 348 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:05,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:54:07,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:54:07,814 INFO L93 Difference]: Finished difference Result 423 states and 501 transitions. [2021-11-03 22:54:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 22:54:07,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 22:54:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:54:07,815 INFO L225 Difference]: With dead ends: 423 [2021-11-03 22:54:07,815 INFO L226 Difference]: Without dead ends: 293 [2021-11-03 22:54:07,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.56ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:54:07,816 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4274.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.82ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4562.46ms IncrementalHoareTripleChecker+Time [2021-11-03 22:54:07,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 704 Unknown, 0 Unchecked, 4.82ms Time], IncrementalHoareTripleChecker [9 Valid, 694 Invalid, 1 Unknown, 0 Unchecked, 4562.46ms Time] [2021-11-03 22:54:07,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-03 22:54:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-11-03 22:54:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 279 states have (on average 1.2437275985663083) internal successors, (347), 292 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 347 transitions. [2021-11-03 22:54:07,823 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 347 transitions. Word has length 74 [2021-11-03 22:54:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:54:07,824 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 347 transitions. [2021-11-03 22:54:07,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 347 transitions. [2021-11-03 22:54:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 22:54:07,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:54:07,825 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:54:07,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 22:54:07,825 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:54:07,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:54:07,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1523912085, now seen corresponding path program 1 times [2021-11-03 22:54:07,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:54:07,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598580058] [2021-11-03 22:54:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:54:07,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:54:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:54:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:54:08,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:54:08,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598580058] [2021-11-03 22:54:08,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598580058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:54:08,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:54:08,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 22:54:08,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490393422] [2021-11-03 22:54:08,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:54:08,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 22:54:08,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:54:08,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 22:54:08,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:54:08,221 INFO L87 Difference]: Start difference. First operand 293 states and 347 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:10,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:54:15,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:54:15,861 INFO L93 Difference]: Finished difference Result 543 states and 641 transitions. [2021-11-03 22:54:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 22:54:15,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 22:54:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:54:15,862 INFO L225 Difference]: With dead ends: 543 [2021-11-03 22:54:15,862 INFO L226 Difference]: Without dead ends: 350 [2021-11-03 22:54:15,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 404.87ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-03 22:54:15,863 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 585 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6895.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.63ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7340.21ms IncrementalHoareTripleChecker+Time [2021-11-03 22:54:15,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 0 Invalid, 1682 Unknown, 0 Unchecked, 11.63ms Time], IncrementalHoareTripleChecker [30 Valid, 1651 Invalid, 1 Unknown, 0 Unchecked, 7340.21ms Time] [2021-11-03 22:54:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-03 22:54:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 293. [2021-11-03 22:54:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 279 states have (on average 1.2401433691756272) internal successors, (346), 292 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 346 transitions. [2021-11-03 22:54:15,875 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 346 transitions. Word has length 77 [2021-11-03 22:54:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:54:15,875 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 346 transitions. [2021-11-03 22:54:15,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 346 transitions. [2021-11-03 22:54:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 22:54:15,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:54:15,876 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:54:15,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 22:54:15,876 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:54:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:54:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1913157973, now seen corresponding path program 1 times [2021-11-03 22:54:15,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:54:15,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051354987] [2021-11-03 22:54:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:54:15,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:54:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:54:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:54:16,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:54:16,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051354987] [2021-11-03 22:54:16,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051354987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:54:16,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:54:16,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 22:54:16,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172171773] [2021-11-03 22:54:16,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:54:16,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 22:54:16,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:54:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 22:54:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:54:16,132 INFO L87 Difference]: Start difference. First operand 293 states and 346 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:18,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:54:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:54:22,052 INFO L93 Difference]: Finished difference Result 464 states and 551 transitions. [2021-11-03 22:54:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 22:54:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-03 22:54:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:54:22,054 INFO L225 Difference]: With dead ends: 464 [2021-11-03 22:54:22,054 INFO L226 Difference]: Without dead ends: 327 [2021-11-03 22:54:22,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 124.58ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:54:22,055 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5440.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.60ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5801.88ms IncrementalHoareTripleChecker+Time [2021-11-03 22:54:22,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 1146 Unknown, 0 Unchecked, 6.60ms Time], IncrementalHoareTripleChecker [11 Valid, 1134 Invalid, 1 Unknown, 0 Unchecked, 5801.88ms Time] [2021-11-03 22:54:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-03 22:54:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 313. [2021-11-03 22:54:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 299 states have (on average 1.2408026755852843) internal successors, (371), 312 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 371 transitions. [2021-11-03 22:54:22,062 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 371 transitions. Word has length 80 [2021-11-03 22:54:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:54:22,062 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 371 transitions. [2021-11-03 22:54:22,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 371 transitions. [2021-11-03 22:54:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 22:54:22,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:54:22,063 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:54:22,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 22:54:22,064 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:54:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:54:22,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2116380707, now seen corresponding path program 1 times [2021-11-03 22:54:22,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:54:22,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904590424] [2021-11-03 22:54:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:54:22,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:54:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:54:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:54:22,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:54:22,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904590424] [2021-11-03 22:54:22,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904590424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:54:22,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:54:22,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 22:54:22,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770057294] [2021-11-03 22:54:22,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:54:22,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 22:54:22,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:54:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 22:54:22,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:54:22,474 INFO L87 Difference]: Start difference. First operand 313 states and 371 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:24,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:54:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:54:30,805 INFO L93 Difference]: Finished difference Result 550 states and 647 transitions. [2021-11-03 22:54:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 22:54:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-03 22:54:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:54:30,807 INFO L225 Difference]: With dead ends: 550 [2021-11-03 22:54:30,807 INFO L226 Difference]: Without dead ends: 392 [2021-11-03 22:54:30,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 444.05ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-03 22:54:30,808 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 538 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7491.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.15ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7996.61ms IncrementalHoareTripleChecker+Time [2021-11-03 22:54:30,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 0 Invalid, 1875 Unknown, 0 Unchecked, 13.15ms Time], IncrementalHoareTripleChecker [36 Valid, 1838 Invalid, 1 Unknown, 0 Unchecked, 7996.61ms Time] [2021-11-03 22:54:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-03 22:54:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 307. [2021-11-03 22:54:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 293 states have (on average 1.242320819112628) internal successors, (364), 306 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 364 transitions. [2021-11-03 22:54:30,815 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 364 transitions. Word has length 81 [2021-11-03 22:54:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:54:30,815 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 364 transitions. [2021-11-03 22:54:30,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 364 transitions. [2021-11-03 22:54:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 22:54:30,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:54:30,816 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:54:30,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 22:54:30,817 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:54:30,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:54:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash -220302441, now seen corresponding path program 1 times [2021-11-03 22:54:30,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:54:30,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115865601] [2021-11-03 22:54:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:54:30,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:54:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:54:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 22:54:32,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:54:32,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115865601] [2021-11-03 22:54:32,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115865601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 22:54:32,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748096211] [2021-11-03 22:54:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:54:32,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 22:54:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 22:54:32,423 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) [2021-11-03 22:54:32,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 22:54:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:54:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 3228 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 22:54:33,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:54:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:54:33,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-03 22:54:33,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748096211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:54:33,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-03 22:54:33,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 20 [2021-11-03 22:54:33,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215732466] [2021-11-03 22:54:33,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:54:33,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 22:54:33,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:54:33,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 22:54:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-03 22:54:33,856 INFO L87 Difference]: Start difference. First operand 307 states and 364 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:36,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:54:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:54:43,353 INFO L93 Difference]: Finished difference Result 712 states and 829 transitions. [2021-11-03 22:54:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 22:54:43,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 22:54:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:54:43,355 INFO L225 Difference]: With dead ends: 712 [2021-11-03 22:54:43,355 INFO L226 Difference]: Without dead ends: 413 [2021-11-03 22:54:43,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1221.79ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-11-03 22:54:43,356 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 189 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8682.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.35ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9230.44ms IncrementalHoareTripleChecker+Time [2021-11-03 22:54:43,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 0 Invalid, 2157 Unknown, 0 Unchecked, 14.35ms Time], IncrementalHoareTripleChecker [62 Valid, 2094 Invalid, 1 Unknown, 0 Unchecked, 9230.44ms Time] [2021-11-03 22:54:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-03 22:54:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 307. [2021-11-03 22:54:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 293 states have (on average 1.2286689419795223) internal successors, (360), 306 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 360 transitions. [2021-11-03 22:54:43,364 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 360 transitions. Word has length 85 [2021-11-03 22:54:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:54:43,365 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 360 transitions. [2021-11-03 22:54:43,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 360 transitions. [2021-11-03 22:54:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 22:54:43,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:54:43,366 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:54:43,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 22:54:43,588 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,SelfDestructingSolverStorable15 [2021-11-03 22:54:43,588 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:54:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:54:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2092884017, now seen corresponding path program 1 times [2021-11-03 22:54:43,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:54:43,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979181126] [2021-11-03 22:54:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:54:43,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:54:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:54:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:54:44,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:54:44,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979181126] [2021-11-03 22:54:44,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979181126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:54:44,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:54:44,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 22:54:44,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698279730] [2021-11-03 22:54:44,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:54:44,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 22:54:44,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:54:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 22:54:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:54:44,080 INFO L87 Difference]: Start difference. First operand 307 states and 360 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:46,438 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:54:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:54:52,381 INFO L93 Difference]: Finished difference Result 531 states and 623 transitions. [2021-11-03 22:54:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 22:54:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-03 22:54:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:54:52,383 INFO L225 Difference]: With dead ends: 531 [2021-11-03 22:54:52,383 INFO L226 Difference]: Without dead ends: 424 [2021-11-03 22:54:52,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 862.87ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-03 22:54:52,384 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 879 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7080.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.80ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7560.95ms IncrementalHoareTripleChecker+Time [2021-11-03 22:54:52,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 0 Invalid, 1426 Unknown, 0 Unchecked, 14.80ms Time], IncrementalHoareTripleChecker [55 Valid, 1370 Invalid, 1 Unknown, 0 Unchecked, 7560.95ms Time] [2021-11-03 22:54:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-03 22:54:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 337. [2021-11-03 22:54:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 323 states have (on average 1.2321981424148607) internal successors, (398), 336 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 398 transitions. [2021-11-03 22:54:52,394 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 398 transitions. Word has length 89 [2021-11-03 22:54:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:54:52,394 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 398 transitions. [2021-11-03 22:54:52,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 398 transitions. [2021-11-03 22:54:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-03 22:54:52,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:54:52,395 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:54:52,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 22:54:52,395 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:54:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:54:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1755794914, now seen corresponding path program 1 times [2021-11-03 22:54:52,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:54:52,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689045052] [2021-11-03 22:54:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:54:52,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:54:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:54:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:54:52,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:54:52,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689045052] [2021-11-03 22:54:52,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689045052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:54:52,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:54:52,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 22:54:52,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215652919] [2021-11-03 22:54:52,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:54:52,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 22:54:52,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:54:52,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 22:54:52,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:54:52,669 INFO L87 Difference]: Start difference. First operand 337 states and 398 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:55,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:54:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:54:57,876 INFO L93 Difference]: Finished difference Result 440 states and 519 transitions. [2021-11-03 22:54:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 22:54:57,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-03 22:54:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:54:57,878 INFO L225 Difference]: With dead ends: 440 [2021-11-03 22:54:57,878 INFO L226 Difference]: Without dead ends: 334 [2021-11-03 22:54:57,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.52ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:54:57,879 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 179 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4834.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5131.67ms IncrementalHoareTripleChecker+Time [2021-11-03 22:54:57,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 0 Invalid, 633 Unknown, 0 Unchecked, 4.65ms Time], IncrementalHoareTripleChecker [2 Valid, 630 Invalid, 1 Unknown, 0 Unchecked, 5131.67ms Time] [2021-11-03 22:54:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-03 22:54:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2021-11-03 22:54:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 319 states have (on average 1.2288401253918495) internal successors, (392), 332 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 392 transitions. [2021-11-03 22:54:57,886 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 392 transitions. Word has length 90 [2021-11-03 22:54:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:54:57,887 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 392 transitions. [2021-11-03 22:54:57,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:54:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 392 transitions. [2021-11-03 22:54:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 22:54:57,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:54:57,888 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:54:57,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 22:54:57,888 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:54:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:54:57,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2001270879, now seen corresponding path program 1 times [2021-11-03 22:54:57,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:54:57,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440948845] [2021-11-03 22:54:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:54:57,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:54:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:54:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 22:54:58,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:54:58,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440948845] [2021-11-03 22:54:58,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440948845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:54:58,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:54:58,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 22:54:58,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222137540] [2021-11-03 22:54:58,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:54:58,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 22:54:58,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:54:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 22:54:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:54:58,156 INFO L87 Difference]: Start difference. First operand 333 states and 392 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:55:00,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:55:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:55:02,843 INFO L93 Difference]: Finished difference Result 435 states and 511 transitions. [2021-11-03 22:55:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 22:55:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-03 22:55:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:55:02,845 INFO L225 Difference]: With dead ends: 435 [2021-11-03 22:55:02,845 INFO L226 Difference]: Without dead ends: 334 [2021-11-03 22:55:02,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.85ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 22:55:02,846 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 412 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4342.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4590.03ms IncrementalHoareTripleChecker+Time [2021-11-03 22:55:02,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 0 Invalid, 681 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [6 Valid, 674 Invalid, 1 Unknown, 0 Unchecked, 4590.03ms Time] [2021-11-03 22:55:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-03 22:55:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2021-11-03 22:55:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 320 states have (on average 1.228125) internal successors, (393), 333 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:55:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 393 transitions. [2021-11-03 22:55:02,854 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 393 transitions. Word has length 91 [2021-11-03 22:55:02,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:55:02,855 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 393 transitions. [2021-11-03 22:55:02,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:55:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 393 transitions. [2021-11-03 22:55:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 22:55:02,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:55:02,856 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:55:02,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 22:55:02,856 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:55:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:55:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1495044718, now seen corresponding path program 1 times [2021-11-03 22:55:02,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:55:02,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772799309] [2021-11-03 22:55:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:55:02,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:55:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:55:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 22:55:03,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:55:03,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772799309] [2021-11-03 22:55:03,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772799309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:55:03,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:55:03,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 22:55:03,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488650740] [2021-11-03 22:55:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:55:03,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 22:55:03,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:55:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 22:55:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:55:03,098 INFO L87 Difference]: Start difference. First operand 334 states and 393 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:55:05,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:55:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:55:09,884 INFO L93 Difference]: Finished difference Result 719 states and 841 transitions. [2021-11-03 22:55:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 22:55:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-03 22:55:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:55:09,886 INFO L225 Difference]: With dead ends: 719 [2021-11-03 22:55:09,886 INFO L226 Difference]: Without dead ends: 407 [2021-11-03 22:55:09,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 83.14ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 22:55:09,887 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 211 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6329.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.38ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6694.38ms IncrementalHoareTripleChecker+Time [2021-11-03 22:55:09,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 0 Invalid, 1153 Unknown, 0 Unchecked, 8.38ms Time], IncrementalHoareTripleChecker [46 Valid, 1106 Invalid, 1 Unknown, 0 Unchecked, 6694.38ms Time] [2021-11-03 22:55:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-03 22:55:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 334. [2021-11-03 22:55:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 320 states have (on average 1.190625) internal successors, (381), 333 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:55:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 381 transitions. [2021-11-03 22:55:09,896 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 381 transitions. Word has length 91 [2021-11-03 22:55:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:55:09,896 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 381 transitions. [2021-11-03 22:55:09,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:55:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 381 transitions. [2021-11-03 22:55:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 22:55:09,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:55:09,897 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:55:09,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 22:55:09,897 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-03 22:55:09,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:55:09,898 INFO L85 PathProgramCache]: Analyzing trace with hash 921681552, now seen corresponding path program 1 times [2021-11-03 22:55:09,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:55:09,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094739154] [2021-11-03 22:55:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:55:09,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:55:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:55:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 22:55:11,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:55:11,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094739154] [2021-11-03 22:55:11,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094739154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 22:55:11,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218855557] [2021-11-03 22:55:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:55:11,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 22:55:11,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 22:55:11,046 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) [2021-11-03 22:55:11,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 22:55:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:55:11,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 3258 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-03 22:55:11,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:55:11,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 22:55:12,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-03 22:55:12,934 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-03 22:55:12,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-11-03 22:55:13,348 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-03 22:55:13,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 37 [2021-11-03 22:55:13,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-03 22:55:13,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-03 22:55:13,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-03 22:55:13,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-03 22:55:13,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-03 22:55:13,916 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-03 22:55:13,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-03 22:55:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 22:55:14,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:55:57,199 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_aws_ntoh32_#res| Int) (v_DerPreprocessor_9 Int) (|ULTIMATE.start_#Ultimate.C_memcpy_#t~loopctr1440| Int) (|ULTIMATE.start_#Ultimate.C_memcpy_#t~loopctr1430| Int) (|v_ULTIMATE.start_#Ultimate.C_memcpy_#t~mem1439_7| Int) (|v_ULTIMATE.start_#Ultimate.C_memcpy_#t~mem1439_8| Int) (|v_ULTIMATE.start_#Ultimate.C_memcpy_#t~loopctr1430_20| Int) (|ULTIMATE.start_aws_byte_cursor_read_common_harness_~#dest_copy~0.offset| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_#Ultimate.C_memcpy_dest.base| (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_#Ultimate.C_memcpy_dest.base|) (+ |ULTIMATE.start_#Ultimate.C_memcpy_#t~loopctr1430| |c_ULTIMATE.start_#Ultimate.C_memcpy_dest.offset|) |v_ULTIMATE.start_#Ultimate.C_memcpy_#t~mem1439_8|) (+ |v_ULTIMATE.start_#Ultimate.C_memcpy_#t~loopctr1430_20| |c_ULTIMATE.start_#Ultimate.C_memcpy_dest.offset|) |v_ULTIMATE.start_#Ultimate.C_memcpy_#t~mem1439_7|) (+ |ULTIMATE.start_#Ultimate.C_memcpy_#t~loopctr1440| |c_ULTIMATE.start_#Ultimate.C_memcpy_dest.offset|) v_DerPreprocessor_9)))) (store .cse0 |c_ULTIMATE.start_aws_byte_cursor_read_common_harness_~#dest_copy~0.base| (store (select .cse0 |c_ULTIMATE.start_aws_byte_cursor_read_common_harness_~#dest_copy~0.base|) |ULTIMATE.start_aws_byte_cursor_read_common_harness_~#dest_copy~0.offset| |ULTIMATE.start_aws_ntoh32_#res|))) |c_ULTIMATE.start_aws_byte_cursor_read_common_harness_~#cur~3.base|) |c_ULTIMATE.start_aws_byte_cursor_read_common_harness_~#cur~3.offset|) 0)) is different from false [2021-11-03 22:56:53,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53525396775 treesize of output 53458287907 Killed by 15