./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_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 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:15:46,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:15:46,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:15:46,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:15:46,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:15:46,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:15:46,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:15:46,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:15:46,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:15:46,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:15:46,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:15:46,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:15:46,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:15:46,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:15:46,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:15:46,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:15:46,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:15:46,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:15:46,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:15:46,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:15:46,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:15:46,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:15:46,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:15:46,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:15:46,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:15:46,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:15:46,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:15:46,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:15:46,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:15:46,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:15:46,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:15:46,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:15:46,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:15:46,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:15:46,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:15:46,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:15:46,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:15:46,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:15:46,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:15:46,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:15:46,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:15:46,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:15:46,747 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:15:46,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:15:46,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:15:46,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:15:46,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:15:46,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:15:46,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:15:46,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:15:46,750 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:15:46,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:15:46,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:15:46,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:15:46,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:15:46,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:15:46,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:15:46,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:15:46,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:15:46,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:15:46,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:15:46,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:15:46,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:15:46,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:15:46,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:15:46,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:15:46,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:15:46,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:15:46,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:15:46,754 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:15:46,755 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:15:46,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:15:46,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:15:46,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd [2021-12-16 03:15:46,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:15:46,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:15:46,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:15:46,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:15:46,992 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:15:46,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2021-12-16 03:15:47,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8093cdf/ff183b989edd48668cf416623dd3c176/FLAG97f6747ae [2021-12-16 03:15:47,613 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:15:47,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2021-12-16 03:15:47,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8093cdf/ff183b989edd48668cf416623dd3c176/FLAG97f6747ae [2021-12-16 03:15:47,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8093cdf/ff183b989edd48668cf416623dd3c176 [2021-12-16 03:15:47,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:15:47,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:15:47,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:15:47,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:15:47,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:15:47,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:15:47" (1/1) ... [2021-12-16 03:15:47,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@533eb042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:47, skipping insertion in model container [2021-12-16 03:15:47,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:15:47" (1/1) ... [2021-12-16 03:15:47,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:15:47,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:15:48,086 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2021-12-16 03:15:48,092 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2021-12-16 03:15:48,686 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:48,692 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:48,693 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:48,694 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:48,696 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:48,705 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:48,706 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:48,708 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:48,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:48,980 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:15:48,981 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:15:48,982 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:15:48,983 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:15:48,984 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:15:48,984 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:15:48,985 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:15:48,985 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:15:48,985 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:15:48,986 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:15:49,078 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:15:49,157 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,157 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:15:49,240 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:15:49,258 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2021-12-16 03:15:49,260 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2021-12-16 03:15:49,296 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,296 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,297 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,297 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,298 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,307 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,309 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,310 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,310 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:15:49,344 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:15:49,345 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:15:49,345 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:15:49,346 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:15:49,346 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:15:49,346 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:15:49,347 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:15:49,347 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:15:49,347 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:15:49,372 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:15:49,450 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,450 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:15:49,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:15:49,616 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:15:49,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49 WrapperNode [2021-12-16 03:15:49,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:15:49,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:15:49,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:15:49,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:15:49,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,777 INFO L137 Inliner]: procedures = 691, calls = 2631, calls flagged for inlining = 59, calls inlined = 7, statements flattened = 816 [2021-12-16 03:15:49,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:15:49,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:15:49,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:15:49,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:15:49,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:15:49,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:15:49,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:15:49,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:15:49,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (1/1) ... [2021-12-16 03:15:49,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:15:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:49,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 03:15:49,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 03:15:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-16 03:15:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-16 03:15:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:15:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-16 03:15:49,913 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-16 03:15:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:15:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 03:15:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 03:15:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-12-16 03:15:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-12-16 03:15:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:15:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:15:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:15:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:15:49,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:15:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-16 03:15:49,916 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-16 03:15:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:15:49,916 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:15:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:15:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:15:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:15:49,916 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-16 03:15:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-16 03:15:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2021-12-16 03:15:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2021-12-16 03:15:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-16 03:15:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-16 03:15:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:15:49,918 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-16 03:15:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-16 03:15:49,918 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-16 03:15:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-16 03:15:49,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:15:50,206 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:15:50,209 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:15:50,693 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:15:50,701 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:15:50,701 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 03:15:50,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:15:50 BoogieIcfgContainer [2021-12-16 03:15:50,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:15:50,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:15:50,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:15:50,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:15:50,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:15:47" (1/3) ... [2021-12-16 03:15:50,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79219128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:15:50, skipping insertion in model container [2021-12-16 03:15:50,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:15:49" (2/3) ... [2021-12-16 03:15:50,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79219128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:15:50, skipping insertion in model container [2021-12-16 03:15:50,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:15:50" (3/3) ... [2021-12-16 03:15:50,711 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reset_harness.i [2021-12-16 03:15:50,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:15:50,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:15:50,761 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:15:50,770 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:15:50,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:15:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 80 states have internal predecessors, (96), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-16 03:15:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 03:15:50,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:50,789 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:50,789 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1110276302, now seen corresponding path program 1 times [2021-12-16 03:15:50,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:50,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247855533] [2021-12-16 03:15:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:50,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:15:51,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:51,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247855533] [2021-12-16 03:15:51,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247855533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:51,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:15:51,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 03:15:51,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364479849] [2021-12-16 03:15:51,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:51,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:15:51,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:51,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:15:51,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:15:51,401 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 80 states have internal predecessors, (96), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 03:15:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:51,622 INFO L93 Difference]: Finished difference Result 224 states and 296 transitions. [2021-12-16 03:15:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:15:51,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2021-12-16 03:15:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:51,637 INFO L225 Difference]: With dead ends: 224 [2021-12-16 03:15:51,637 INFO L226 Difference]: Without dead ends: 105 [2021-12-16 03:15:51,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:15:51,650 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 65 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:51,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 151 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:15:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-16 03:15:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-16 03:15:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-16 03:15:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2021-12-16 03:15:51,725 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 46 [2021-12-16 03:15:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:51,726 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2021-12-16 03:15:51,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 03:15:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2021-12-16 03:15:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-16 03:15:51,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:51,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:51,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:15:51,731 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1937663032, now seen corresponding path program 1 times [2021-12-16 03:15:51,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:51,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487080143] [2021-12-16 03:15:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:51,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:15:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:15:51,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487080143] [2021-12-16 03:15:51,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487080143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:51,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:15:51,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:15:51,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24899313] [2021-12-16 03:15:51,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:51,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:15:51,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:15:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:15:51,994 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 03:15:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:52,268 INFO L93 Difference]: Finished difference Result 188 states and 232 transitions. [2021-12-16 03:15:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:15:52,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2021-12-16 03:15:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:52,271 INFO L225 Difference]: With dead ends: 188 [2021-12-16 03:15:52,271 INFO L226 Difference]: Without dead ends: 108 [2021-12-16 03:15:52,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:15:52,272 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 97 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:52,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 239 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:15:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-16 03:15:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-16 03:15:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.178082191780822) internal successors, (86), 76 states have internal predecessors, (86), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-16 03:15:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2021-12-16 03:15:52,298 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 46 [2021-12-16 03:15:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:52,298 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2021-12-16 03:15:52,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 03:15:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2021-12-16 03:15:52,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 03:15:52,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:52,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:52,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:15:52,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1805915411, now seen corresponding path program 1 times [2021-12-16 03:15:52,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:52,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234050079] [2021-12-16 03:15:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:52,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:15:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:15:52,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:52,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234050079] [2021-12-16 03:15:52,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234050079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:52,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:15:52,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:15:52,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398561331] [2021-12-16 03:15:52,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:52,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:15:52,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:15:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:15:52,548 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 03:15:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:52,934 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2021-12-16 03:15:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:15:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2021-12-16 03:15:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:52,936 INFO L225 Difference]: With dead ends: 114 [2021-12-16 03:15:52,936 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 03:15:52,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:15:52,937 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 82 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:52,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 333 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:15:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 03:15:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-16 03:15:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 79 states have internal predecessors, (89), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2021-12-16 03:15:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2021-12-16 03:15:52,945 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 52 [2021-12-16 03:15:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:52,945 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2021-12-16 03:15:52,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 03:15:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2021-12-16 03:15:52,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 03:15:52,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:52,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:52,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:15:52,947 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:52,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1287993371, now seen corresponding path program 1 times [2021-12-16 03:15:52,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:52,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979078364] [2021-12-16 03:15:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:52,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:15:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:15:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 03:15:53,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:53,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979078364] [2021-12-16 03:15:53,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979078364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:53,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:15:53,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 03:15:53,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652690685] [2021-12-16 03:15:53,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:53,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:15:53,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:53,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:15:53,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:15:53,331 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 03:15:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:53,927 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2021-12-16 03:15:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:15:53,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2021-12-16 03:15:53,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:53,929 INFO L225 Difference]: With dead ends: 130 [2021-12-16 03:15:53,929 INFO L226 Difference]: Without dead ends: 128 [2021-12-16 03:15:53,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:15:53,930 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 151 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:53,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 277 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 03:15:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-16 03:15:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2021-12-16 03:15:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 85 states have internal predecessors, (95), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (25), 22 states have call predecessors, (25), 23 states have call successors, (25) [2021-12-16 03:15:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2021-12-16 03:15:53,949 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 58 [2021-12-16 03:15:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:53,950 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2021-12-16 03:15:53,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 03:15:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2021-12-16 03:15:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 03:15:53,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:53,951 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:53,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:15:53,951 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash 388379591, now seen corresponding path program 1 times [2021-12-16 03:15:53,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:53,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279782653] [2021-12-16 03:15:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:53,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:54,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:54,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:54,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:54,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:15:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:54,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:15:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:54,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:15:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 03:15:54,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:54,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279782653] [2021-12-16 03:15:54,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279782653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:54,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:15:54,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:15:54,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992462609] [2021-12-16 03:15:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:54,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:15:54,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:15:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:15:54,317 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:15:54,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:54,765 INFO L93 Difference]: Finished difference Result 134 states and 159 transitions. [2021-12-16 03:15:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:15:54,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-12-16 03:15:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:54,767 INFO L225 Difference]: With dead ends: 134 [2021-12-16 03:15:54,767 INFO L226 Difference]: Without dead ends: 132 [2021-12-16 03:15:54,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:15:54,768 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 91 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:54,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 347 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 03:15:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-16 03:15:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2021-12-16 03:15:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 89 states have internal predecessors, (99), 26 states have call successors, (26), 14 states have call predecessors, (26), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2021-12-16 03:15:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 151 transitions. [2021-12-16 03:15:54,775 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 151 transitions. Word has length 64 [2021-12-16 03:15:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:54,776 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 151 transitions. [2021-12-16 03:15:54,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 03:15:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 151 transitions. [2021-12-16 03:15:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 03:15:54,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:54,777 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:54,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:15:54,778 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:54,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:54,778 INFO L85 PathProgramCache]: Analyzing trace with hash -472545423, now seen corresponding path program 1 times [2021-12-16 03:15:54,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:54,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666017430] [2021-12-16 03:15:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:54,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:15:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:15:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:15:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:15:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 03:15:55,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:55,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666017430] [2021-12-16 03:15:55,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666017430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:55,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:15:55,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 03:15:55,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635875286] [2021-12-16 03:15:55,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:55,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:15:55,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:15:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:15:55,274 INFO L87 Difference]: Start difference. First operand 127 states and 151 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:15:55,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:55,763 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2021-12-16 03:15:55,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:15:55,763 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 70 [2021-12-16 03:15:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:55,765 INFO L225 Difference]: With dead ends: 138 [2021-12-16 03:15:55,765 INFO L226 Difference]: Without dead ends: 136 [2021-12-16 03:15:55,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:15:55,768 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 157 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:55,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 251 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 03:15:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-16 03:15:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-12-16 03:15:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 93 states have internal predecessors, (103), 27 states have call successors, (27), 15 states have call predecessors, (27), 15 states have return successors, (27), 24 states have call predecessors, (27), 25 states have call successors, (27) [2021-12-16 03:15:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2021-12-16 03:15:55,793 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 70 [2021-12-16 03:15:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:55,793 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2021-12-16 03:15:55,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:15:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2021-12-16 03:15:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 03:15:55,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:55,795 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:55,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:15:55,796 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash -918234075, now seen corresponding path program 1 times [2021-12-16 03:15:55,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:55,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599344165] [2021-12-16 03:15:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:55,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:15:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:15:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:15:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 03:15:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:15:55,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599344165] [2021-12-16 03:15:55,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599344165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510997650] [2021-12-16 03:15:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:55,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:56,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:15:56,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:15:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 03:15:56,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 03:15:56,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:56,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510997650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:56,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:56,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-12-16 03:15:56,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758578140] [2021-12-16 03:15:56,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:56,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:15:56,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:15:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:15:56,713 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-16 03:15:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:56,864 INFO L93 Difference]: Finished difference Result 214 states and 253 transitions. [2021-12-16 03:15:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:15:56,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-12-16 03:15:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:56,867 INFO L225 Difference]: With dead ends: 214 [2021-12-16 03:15:56,867 INFO L226 Difference]: Without dead ends: 130 [2021-12-16 03:15:56,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-12-16 03:15:56,869 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 169 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:56,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 546 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:15:56,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-16 03:15:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-16 03:15:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 90 states have internal predecessors, (100), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 03:15:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2021-12-16 03:15:56,880 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 72 [2021-12-16 03:15:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:56,880 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2021-12-16 03:15:56,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-16 03:15:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2021-12-16 03:15:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-16 03:15:56,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:56,881 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:56,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:15:57,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:57,084 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -54561733, now seen corresponding path program 1 times [2021-12-16 03:15:57,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:57,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980831069] [2021-12-16 03:15:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:57,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:15:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:15:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:15:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:15:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-16 03:15:57,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:57,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980831069] [2021-12-16 03:15:57,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980831069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:57,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:15:57,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:15:57,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380729776] [2021-12-16 03:15:57,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:57,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:15:57,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:57,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:15:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:15:57,299 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-16 03:15:57,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:57,643 INFO L93 Difference]: Finished difference Result 142 states and 166 transitions. [2021-12-16 03:15:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:15:57,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 84 [2021-12-16 03:15:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:57,644 INFO L225 Difference]: With dead ends: 142 [2021-12-16 03:15:57,644 INFO L226 Difference]: Without dead ends: 140 [2021-12-16 03:15:57,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:15:57,645 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 85 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:57,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 464 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:15:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-16 03:15:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-12-16 03:15:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 94 states have (on average 1.127659574468085) internal successors, (106), 97 states have internal predecessors, (106), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2021-12-16 03:15:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2021-12-16 03:15:57,653 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 84 [2021-12-16 03:15:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:57,653 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2021-12-16 03:15:57,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-16 03:15:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2021-12-16 03:15:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 03:15:57,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:57,654 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:57,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:15:57,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:57,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:57,655 INFO L85 PathProgramCache]: Analyzing trace with hash 300350147, now seen corresponding path program 1 times [2021-12-16 03:15:57,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:57,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757192060] [2021-12-16 03:15:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:57,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:15:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:15:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:15:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:15:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 03:15:57,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:57,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757192060] [2021-12-16 03:15:57,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757192060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:57,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:15:57,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:15:57,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692675694] [2021-12-16 03:15:57,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:57,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:15:57,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:57,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:15:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:15:57,895 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:15:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:58,213 INFO L93 Difference]: Finished difference Result 278 states and 336 transitions. [2021-12-16 03:15:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:15:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2021-12-16 03:15:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:58,215 INFO L225 Difference]: With dead ends: 278 [2021-12-16 03:15:58,215 INFO L226 Difference]: Without dead ends: 164 [2021-12-16 03:15:58,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:15:58,216 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 130 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:58,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 313 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:15:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-16 03:15:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2021-12-16 03:15:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 102 states have internal predecessors, (113), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2021-12-16 03:15:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2021-12-16 03:15:58,224 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 88 [2021-12-16 03:15:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:58,224 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2021-12-16 03:15:58,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:15:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2021-12-16 03:15:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 03:15:58,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:58,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:58,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:15:58,226 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:58,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash 558515585, now seen corresponding path program 1 times [2021-12-16 03:15:58,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:58,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362189480] [2021-12-16 03:15:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:58,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:15:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:15:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:15:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:15:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:15:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:15:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:15:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:15:58,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:15:58,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362189480] [2021-12-16 03:15:58,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362189480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:15:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825792145] [2021-12-16 03:15:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:58,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:15:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:15:58,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:15:58,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:15:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:59,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 03:15:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:15:59,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 03:15:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 03:15:59,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:15:59,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825792145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:15:59,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:15:59,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2021-12-16 03:15:59,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176069613] [2021-12-16 03:15:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:15:59,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 03:15:59,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:15:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 03:15:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:15:59,570 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-16 03:15:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:15:59,654 INFO L93 Difference]: Finished difference Result 286 states and 339 transitions. [2021-12-16 03:15:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:15:59,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 88 [2021-12-16 03:15:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:15:59,656 INFO L225 Difference]: With dead ends: 286 [2021-12-16 03:15:59,656 INFO L226 Difference]: Without dead ends: 163 [2021-12-16 03:15:59,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:15:59,658 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 25 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:15:59,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 869 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2021-12-16 03:15:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-16 03:15:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-12-16 03:15:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 117 states have (on average 1.1623931623931625) internal successors, (136), 120 states have internal predecessors, (136), 28 states have call successors, (28), 17 states have call predecessors, (28), 17 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2021-12-16 03:15:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 193 transitions. [2021-12-16 03:15:59,667 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 193 transitions. Word has length 88 [2021-12-16 03:15:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:15:59,667 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 193 transitions. [2021-12-16 03:15:59,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-16 03:15:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 193 transitions. [2021-12-16 03:15:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 03:15:59,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:15:59,669 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:15:59,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:15:59,895 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,SelfDestructingSolverStorable9 [2021-12-16 03:15:59,895 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:15:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:15:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash 599190335, now seen corresponding path program 1 times [2021-12-16 03:15:59,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:15:59,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049472910] [2021-12-16 03:15:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:15:59,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:15:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:59,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:15:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:15:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:15:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:00,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:00,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 03:16:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:00,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 03:16:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:00,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:16:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:00,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:16:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 03:16:00,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049472910] [2021-12-16 03:16:00,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049472910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573652916] [2021-12-16 03:16:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:00,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:16:00,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:16:00,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:16:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:00,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:16:00,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:16:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 03:16:00,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:16:00,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573652916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:00,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:16:00,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-16 03:16:00,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885746884] [2021-12-16 03:16:00,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:00,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:16:00,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:00,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:16:00,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:16:00,622 INFO L87 Difference]: Start difference. First operand 163 states and 193 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:00,642 INFO L93 Difference]: Finished difference Result 295 states and 354 transitions. [2021-12-16 03:16:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:16:00,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2021-12-16 03:16:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:00,643 INFO L225 Difference]: With dead ends: 295 [2021-12-16 03:16:00,643 INFO L226 Difference]: Without dead ends: 172 [2021-12-16 03:16:00,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:16:00,644 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 20 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:00,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 373 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:16:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-16 03:16:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 155. [2021-12-16 03:16:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 112 states have internal predecessors, (127), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (28), 25 states have call predecessors, (28), 26 states have call successors, (28) [2021-12-16 03:16:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2021-12-16 03:16:00,650 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 88 [2021-12-16 03:16:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:00,651 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2021-12-16 03:16:00,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2021-12-16 03:16:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-16 03:16:00,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:00,651 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:00,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:16:00,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:00,888 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1357155461, now seen corresponding path program 2 times [2021-12-16 03:16:00,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:00,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103580673] [2021-12-16 03:16:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:00,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 03:16:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:16:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 03:16:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:16:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-16 03:16:01,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:01,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103580673] [2021-12-16 03:16:01,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103580673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:01,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904004656] [2021-12-16 03:16:01,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:16:01,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:01,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:16:01,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:16:01,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:16:01,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 03:16:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:16:01,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 2334 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 03:16:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:16:01,643 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-16 03:16:01,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 03:16:01,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:16:01,650 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 [2021-12-16 03:16:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 03:16:02,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:16:02,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904004656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:02,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:16:02,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2021-12-16 03:16:02,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282167606] [2021-12-16 03:16:02,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:02,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:16:02,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:16:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:16:02,143 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:02,230 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2021-12-16 03:16:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:16:02,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 92 [2021-12-16 03:16:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:02,232 INFO L225 Difference]: With dead ends: 224 [2021-12-16 03:16:02,232 INFO L226 Difference]: Without dead ends: 178 [2021-12-16 03:16:02,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:16:02,233 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 14 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:02,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 732 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2021-12-16 03:16:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-16 03:16:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2021-12-16 03:16:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.1811023622047243) internal successors, (150), 129 states have internal predecessors, (150), 29 states have call successors, (29), 18 states have call predecessors, (29), 16 states have return successors, (30), 25 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-16 03:16:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2021-12-16 03:16:02,242 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 92 [2021-12-16 03:16:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:02,243 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2021-12-16 03:16:02,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:02,243 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2021-12-16 03:16:02,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-16 03:16:02,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:02,244 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:02,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:16:02,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:02,465 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:02,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:02,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1657948157, now seen corresponding path program 2 times [2021-12-16 03:16:02,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:02,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084860731] [2021-12-16 03:16:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:02,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 03:16:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:16:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 03:16:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:16:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:16:02,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:02,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084860731] [2021-12-16 03:16:02,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084860731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:02,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:02,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:16:02,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68719991] [2021-12-16 03:16:02,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:02,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:16:02,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:02,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:16:02,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:16:02,682 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:03,058 INFO L93 Difference]: Finished difference Result 237 states and 283 transitions. [2021-12-16 03:16:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:16:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 92 [2021-12-16 03:16:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:03,060 INFO L225 Difference]: With dead ends: 237 [2021-12-16 03:16:03,060 INFO L226 Difference]: Without dead ends: 197 [2021-12-16 03:16:03,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:16:03,061 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 144 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:03,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 353 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:16:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-16 03:16:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2021-12-16 03:16:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 138 states have (on average 1.181159420289855) internal successors, (163), 141 states have internal predecessors, (163), 29 states have call successors, (29), 18 states have call predecessors, (29), 17 states have return successors, (32), 25 states have call predecessors, (32), 27 states have call successors, (32) [2021-12-16 03:16:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2021-12-16 03:16:03,069 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 92 [2021-12-16 03:16:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:03,069 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2021-12-16 03:16:03,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2021-12-16 03:16:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-16 03:16:03,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:03,071 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:03,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 03:16:03,071 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash -188565183, now seen corresponding path program 1 times [2021-12-16 03:16:03,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:03,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752376521] [2021-12-16 03:16:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:03,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 03:16:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:16:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 03:16:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:16:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-16 03:16:03,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:03,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752376521] [2021-12-16 03:16:03,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752376521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:03,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132168299] [2021-12-16 03:16:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:03,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:03,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:16:03,305 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:16:03,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:16:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 2567 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 03:16:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:16:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 03:16:03,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:16:03,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132168299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:03,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:16:03,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-16 03:16:03,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747034792] [2021-12-16 03:16:03,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:03,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:16:03,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:16:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:16:03,850 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:16:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:03,944 INFO L93 Difference]: Finished difference Result 346 states and 420 transitions. [2021-12-16 03:16:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:16:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 92 [2021-12-16 03:16:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:03,946 INFO L225 Difference]: With dead ends: 346 [2021-12-16 03:16:03,946 INFO L226 Difference]: Without dead ends: 195 [2021-12-16 03:16:03,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:16:03,947 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 12 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:03,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 918 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:16:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-16 03:16:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-16 03:16:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 146 states have (on average 1.1712328767123288) internal successors, (171), 151 states have internal predecessors, (171), 29 states have call successors, (29), 18 states have call predecessors, (29), 19 states have return successors, (36), 25 states have call predecessors, (36), 27 states have call successors, (36) [2021-12-16 03:16:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2021-12-16 03:16:03,955 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 92 [2021-12-16 03:16:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:03,955 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2021-12-16 03:16:03,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 03:16:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2021-12-16 03:16:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 03:16:03,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:03,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:04,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:16:04,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 03:16:04,170 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:04,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:04,171 INFO L85 PathProgramCache]: Analyzing trace with hash 498200316, now seen corresponding path program 1 times [2021-12-16 03:16:04,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:04,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839070871] [2021-12-16 03:16:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:04,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:16:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:16:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-16 03:16:04,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:04,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839070871] [2021-12-16 03:16:04,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839070871] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154636200] [2021-12-16 03:16:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:04,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:04,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:16:04,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:16:04,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:16:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:04,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:16:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:16:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 03:16:04,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:16:04,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154636200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:04,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:16:04,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-16 03:16:04,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521253249] [2021-12-16 03:16:04,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:04,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:16:04,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:16:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:16:04,798 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:04,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:04,818 INFO L93 Difference]: Finished difference Result 356 states and 436 transitions. [2021-12-16 03:16:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:16:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2021-12-16 03:16:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:04,819 INFO L225 Difference]: With dead ends: 356 [2021-12-16 03:16:04,819 INFO L226 Difference]: Without dead ends: 188 [2021-12-16 03:16:04,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:16:04,821 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 9 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:04,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 366 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:16:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-16 03:16:04,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2021-12-16 03:16:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 137 states have (on average 1.1386861313868613) internal successors, (156), 141 states have internal predecessors, (156), 29 states have call successors, (29), 18 states have call predecessors, (29), 18 states have return successors, (34), 25 states have call predecessors, (34), 27 states have call successors, (34) [2021-12-16 03:16:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 219 transitions. [2021-12-16 03:16:04,832 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 219 transitions. Word has length 94 [2021-12-16 03:16:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:04,832 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 219 transitions. [2021-12-16 03:16:04,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 219 transitions. [2021-12-16 03:16:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 03:16:04,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:04,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:04,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 03:16:05,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 03:16:05,048 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -116892360, now seen corresponding path program 1 times [2021-12-16 03:16:05,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:05,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87753257] [2021-12-16 03:16:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:05,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:16:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:16:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-16 03:16:05,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87753257] [2021-12-16 03:16:05,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87753257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283596851] [2021-12-16 03:16:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:05,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:05,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:16:05,200 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:16:05,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:16:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:05,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 2574 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:16:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:16:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 03:16:05,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:16:05,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283596851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:05,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:16:05,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-16 03:16:05,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173526764] [2021-12-16 03:16:05,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:05,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:16:05,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:05,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:16:05,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:16:05,686 INFO L87 Difference]: Start difference. First operand 185 states and 219 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:05,708 INFO L93 Difference]: Finished difference Result 337 states and 408 transitions. [2021-12-16 03:16:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:16:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2021-12-16 03:16:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:05,710 INFO L225 Difference]: With dead ends: 337 [2021-12-16 03:16:05,710 INFO L226 Difference]: Without dead ends: 182 [2021-12-16 03:16:05,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:16:05,711 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 34 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:05,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 364 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:16:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-16 03:16:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-12-16 03:16:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 125 states have (on average 1.112) internal successors, (139), 129 states have internal predecessors, (139), 29 states have call successors, (29), 18 states have call predecessors, (29), 18 states have return successors, (34), 25 states have call predecessors, (34), 27 states have call successors, (34) [2021-12-16 03:16:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 202 transitions. [2021-12-16 03:16:05,721 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 202 transitions. Word has length 94 [2021-12-16 03:16:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:05,722 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 202 transitions. [2021-12-16 03:16:05,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 202 transitions. [2021-12-16 03:16:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 03:16:05,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:05,724 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:05,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 03:16:05,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:05,946 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash 562379894, now seen corresponding path program 2 times [2021-12-16 03:16:05,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:05,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583259384] [2021-12-16 03:16:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:05,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:16:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:16:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:16:06,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:06,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583259384] [2021-12-16 03:16:06,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583259384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:06,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:06,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:16:06,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271342918] [2021-12-16 03:16:06,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:06,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:16:06,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:06,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:16:06,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:16:06,179 INFO L87 Difference]: Start difference. First operand 173 states and 202 transitions. Second operand has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:06,488 INFO L93 Difference]: Finished difference Result 218 states and 252 transitions. [2021-12-16 03:16:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:16:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2021-12-16 03:16:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:06,490 INFO L225 Difference]: With dead ends: 218 [2021-12-16 03:16:06,490 INFO L226 Difference]: Without dead ends: 178 [2021-12-16 03:16:06,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:16:06,491 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 110 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:06,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 302 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:16:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-16 03:16:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2021-12-16 03:16:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 125 states have (on average 1.112) internal successors, (139), 129 states have internal predecessors, (139), 29 states have call successors, (29), 18 states have call predecessors, (29), 18 states have return successors, (34), 25 states have call predecessors, (34), 27 states have call successors, (34) [2021-12-16 03:16:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 202 transitions. [2021-12-16 03:16:06,498 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 202 transitions. Word has length 94 [2021-12-16 03:16:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:06,498 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 202 transitions. [2021-12-16 03:16:06,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 202 transitions. [2021-12-16 03:16:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 03:16:06,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:06,500 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:06,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 03:16:06,500 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:06,501 INFO L85 PathProgramCache]: Analyzing trace with hash 820545332, now seen corresponding path program 2 times [2021-12-16 03:16:06,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:06,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187958681] [2021-12-16 03:16:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:06,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:16:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:16:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 03:16:06,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:06,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187958681] [2021-12-16 03:16:06,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187958681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:06,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:06,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:16:06,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843366044] [2021-12-16 03:16:06,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:06,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:16:06,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:06,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:16:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:16:06,712 INFO L87 Difference]: Start difference. First operand 173 states and 202 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-16 03:16:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:06,969 INFO L93 Difference]: Finished difference Result 296 states and 345 transitions. [2021-12-16 03:16:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:16:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 94 [2021-12-16 03:16:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:06,971 INFO L225 Difference]: With dead ends: 296 [2021-12-16 03:16:06,971 INFO L226 Difference]: Without dead ends: 178 [2021-12-16 03:16:06,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:16:06,973 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 95 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:06,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 231 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:16:06,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-16 03:16:06,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2021-12-16 03:16:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 125 states have (on average 1.104) internal successors, (138), 129 states have internal predecessors, (138), 29 states have call successors, (29), 18 states have call predecessors, (29), 18 states have return successors, (33), 25 states have call predecessors, (33), 27 states have call successors, (33) [2021-12-16 03:16:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 200 transitions. [2021-12-16 03:16:06,980 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 200 transitions. Word has length 94 [2021-12-16 03:16:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:06,981 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 200 transitions. [2021-12-16 03:16:06,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-16 03:16:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 200 transitions. [2021-12-16 03:16:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 03:16:06,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:06,984 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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] [2021-12-16 03:16:06,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 03:16:06,986 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:06,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:06,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1730782770, now seen corresponding path program 1 times [2021-12-16 03:16:06,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:06,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142372334] [2021-12-16 03:16:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:06,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:16:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:16:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:16:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-16 03:16:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:16:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 03:16:07,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:07,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142372334] [2021-12-16 03:16:07,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142372334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:07,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:07,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:16:07,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394659439] [2021-12-16 03:16:07,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:07,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:16:07,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:07,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:16:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:16:07,209 INFO L87 Difference]: Start difference. First operand 173 states and 200 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 03:16:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:07,388 INFO L93 Difference]: Finished difference Result 196 states and 222 transitions. [2021-12-16 03:16:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:16:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 97 [2021-12-16 03:16:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:07,389 INFO L225 Difference]: With dead ends: 196 [2021-12-16 03:16:07,389 INFO L226 Difference]: Without dead ends: 152 [2021-12-16 03:16:07,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:16:07,390 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 76 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:07,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 219 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:16:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-16 03:16:07,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-12-16 03:16:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 111 states have (on average 1.1081081081081081) internal successors, (123), 114 states have internal predecessors, (123), 25 states have call successors, (25), 15 states have call predecessors, (25), 15 states have return successors, (29), 22 states have call predecessors, (29), 23 states have call successors, (29) [2021-12-16 03:16:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 177 transitions. [2021-12-16 03:16:07,397 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 177 transitions. Word has length 97 [2021-12-16 03:16:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:07,397 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 177 transitions. [2021-12-16 03:16:07,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 03:16:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 177 transitions. [2021-12-16 03:16:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 03:16:07,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:07,399 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:07,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 03:16:07,399 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:07,400 INFO L85 PathProgramCache]: Analyzing trace with hash 444792923, now seen corresponding path program 1 times [2021-12-16 03:16:07,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:07,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651795690] [2021-12-16 03:16:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:07,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:16:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:16:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-16 03:16:07,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:07,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651795690] [2021-12-16 03:16:07,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651795690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:07,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:07,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 03:16:07,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68607526] [2021-12-16 03:16:07,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:07,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:16:07,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:07,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:16:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:16:07,625 INFO L87 Difference]: Start difference. First operand 152 states and 177 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-16 03:16:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:08,081 INFO L93 Difference]: Finished difference Result 166 states and 194 transitions. [2021-12-16 03:16:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:16:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 96 [2021-12-16 03:16:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:08,083 INFO L225 Difference]: With dead ends: 166 [2021-12-16 03:16:08,083 INFO L226 Difference]: Without dead ends: 164 [2021-12-16 03:16:08,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:16:08,084 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 91 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:08,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 565 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:16:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-16 03:16:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2021-12-16 03:16:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 116 states have (on average 1.103448275862069) internal successors, (128), 120 states have internal predecessors, (128), 25 states have call successors, (25), 15 states have call predecessors, (25), 16 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2021-12-16 03:16:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2021-12-16 03:16:08,090 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 96 [2021-12-16 03:16:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:08,091 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2021-12-16 03:16:08,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-16 03:16:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2021-12-16 03:16:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 03:16:08,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:08,092 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:08,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 03:16:08,092 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:08,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1145857501, now seen corresponding path program 1 times [2021-12-16 03:16:08,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:08,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632289357] [2021-12-16 03:16:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:08,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:16:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:16:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 03:16:08,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:08,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632289357] [2021-12-16 03:16:08,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632289357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:08,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:08,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:16:08,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284837278] [2021-12-16 03:16:08,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:08,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:16:08,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:16:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:16:08,292 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:08,609 INFO L93 Difference]: Finished difference Result 198 states and 229 transitions. [2021-12-16 03:16:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:16:08,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 96 [2021-12-16 03:16:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:08,610 INFO L225 Difference]: With dead ends: 198 [2021-12-16 03:16:08,610 INFO L226 Difference]: Without dead ends: 158 [2021-12-16 03:16:08,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:16:08,611 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 88 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:08,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 344 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:16:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-16 03:16:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-12-16 03:16:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 116 states have (on average 1.103448275862069) internal successors, (128), 120 states have internal predecessors, (128), 25 states have call successors, (25), 15 states have call predecessors, (25), 16 states have return successors, (31), 22 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-16 03:16:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 184 transitions. [2021-12-16 03:16:08,616 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 184 transitions. Word has length 96 [2021-12-16 03:16:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:08,618 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 184 transitions. [2021-12-16 03:16:08,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 03:16:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 184 transitions. [2021-12-16 03:16:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 03:16:08,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:08,619 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:08,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 03:16:08,619 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:08,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:08,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2080738469, now seen corresponding path program 1 times [2021-12-16 03:16:08,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:08,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938574740] [2021-12-16 03:16:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:08,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:08,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:16:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:09,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:09,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 03:16:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:09,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 03:16:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:09,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:16:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:09,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 03:16:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-16 03:16:09,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:09,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938574740] [2021-12-16 03:16:09,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938574740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:09,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:09,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:16:09,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676632217] [2021-12-16 03:16:09,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:09,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:16:09,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:09,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:16:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:16:09,265 INFO L87 Difference]: Start difference. First operand 158 states and 184 transitions. Second operand has 14 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 8 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-16 03:16:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:09,975 INFO L93 Difference]: Finished difference Result 192 states and 227 transitions. [2021-12-16 03:16:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:16:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 8 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 106 [2021-12-16 03:16:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:09,978 INFO L225 Difference]: With dead ends: 192 [2021-12-16 03:16:09,979 INFO L226 Difference]: Without dead ends: 190 [2021-12-16 03:16:09,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:16:09,979 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 220 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:09,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 282 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:16:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-16 03:16:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 183. [2021-12-16 03:16:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 132 states have (on average 1.0984848484848484) internal successors, (145), 137 states have internal predecessors, (145), 30 states have call successors, (30), 16 states have call predecessors, (30), 20 states have return successors, (41), 29 states have call predecessors, (41), 28 states have call successors, (41) [2021-12-16 03:16:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 216 transitions. [2021-12-16 03:16:09,988 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 216 transitions. Word has length 106 [2021-12-16 03:16:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:09,989 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 216 transitions. [2021-12-16 03:16:09,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 8 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-16 03:16:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 216 transitions. [2021-12-16 03:16:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 03:16:09,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:09,990 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:09,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-16 03:16:09,990 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:09,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1476515312, now seen corresponding path program 1 times [2021-12-16 03:16:09,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:09,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949420362] [2021-12-16 03:16:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:09,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:16:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 03:16:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 03:16:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-16 03:16:10,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949420362] [2021-12-16 03:16:10,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949420362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091747118] [2021-12-16 03:16:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:10,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:10,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:16:10,449 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:16:10,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:16:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2665 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 03:16:10,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:16:10,896 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 6 treesize of output 5 [2021-12-16 03:16:10,898 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 6 treesize of output 5 [2021-12-16 03:16:11,256 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 19 treesize of output 7 [2021-12-16 03:16:11,260 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 19 treesize of output 7 [2021-12-16 03:16:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 03:16:11,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:16:11,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091747118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:11,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:16:11,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 25 [2021-12-16 03:16:11,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184250493] [2021-12-16 03:16:11,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:11,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:16:11,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:16:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-12-16 03:16:11,328 INFO L87 Difference]: Start difference. First operand 183 states and 216 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-16 03:16:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:11,597 INFO L93 Difference]: Finished difference Result 327 states and 377 transitions. [2021-12-16 03:16:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:16:11,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 112 [2021-12-16 03:16:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:11,598 INFO L225 Difference]: With dead ends: 327 [2021-12-16 03:16:11,598 INFO L226 Difference]: Without dead ends: 190 [2021-12-16 03:16:11,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-12-16 03:16:11,599 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 52 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:11,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 814 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2021-12-16 03:16:11,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-16 03:16:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-12-16 03:16:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 137 states have (on average 1.094890510948905) internal successors, (150), 141 states have internal predecessors, (150), 31 states have call successors, (31), 17 states have call predecessors, (31), 21 states have return successors, (42), 31 states have call predecessors, (42), 29 states have call successors, (42) [2021-12-16 03:16:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 223 transitions. [2021-12-16 03:16:11,606 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 223 transitions. Word has length 112 [2021-12-16 03:16:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:11,606 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 223 transitions. [2021-12-16 03:16:11,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-16 03:16:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 223 transitions. [2021-12-16 03:16:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 03:16:11,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:11,608 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:11,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 03:16:11,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-16 03:16:11,823 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1680736505, now seen corresponding path program 1 times [2021-12-16 03:16:11,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:11,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044616335] [2021-12-16 03:16:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:11,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:16:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 03:16:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 03:16:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:16:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 03:16:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 03:16:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-16 03:16:12,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:12,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044616335] [2021-12-16 03:16:12,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044616335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:12,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:12,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 03:16:12,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335449847] [2021-12-16 03:16:12,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:12,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:16:12,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:12,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:16:12,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:16:12,361 INFO L87 Difference]: Start difference. First operand 190 states and 223 transitions. Second operand has 14 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 8 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-16 03:16:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:13,085 INFO L93 Difference]: Finished difference Result 203 states and 237 transitions. [2021-12-16 03:16:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:16:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 8 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) Word has length 112 [2021-12-16 03:16:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:13,087 INFO L225 Difference]: With dead ends: 203 [2021-12-16 03:16:13,087 INFO L226 Difference]: Without dead ends: 201 [2021-12-16 03:16:13,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:16:13,088 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 168 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:13,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 289 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:16:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-16 03:16:13,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2021-12-16 03:16:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 145 states have internal predecessors, (154), 32 states have call successors, (32), 18 states have call predecessors, (32), 22 states have return successors, (43), 32 states have call predecessors, (43), 30 states have call successors, (43) [2021-12-16 03:16:13,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 229 transitions. [2021-12-16 03:16:13,098 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 229 transitions. Word has length 112 [2021-12-16 03:16:13,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:13,099 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 229 transitions. [2021-12-16 03:16:13,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 8 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2021-12-16 03:16:13,099 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 229 transitions. [2021-12-16 03:16:13,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-16 03:16:13,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:13,105 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:13,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-16 03:16:13,105 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:13,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1114984106, now seen corresponding path program 1 times [2021-12-16 03:16:13,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:13,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251152636] [2021-12-16 03:16:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:13,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 03:16:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 03:16:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 03:16:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 03:16:13,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:13,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251152636] [2021-12-16 03:16:13,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251152636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:13,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064425208] [2021-12-16 03:16:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:13,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:13,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:16:13,383 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:16:13,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 03:16:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:13,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 03:16:13,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:16:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 03:16:13,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:16:13,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064425208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:13,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:16:13,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-12-16 03:16:13,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64805808] [2021-12-16 03:16:13,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:13,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:16:13,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:16:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:16:13,965 INFO L87 Difference]: Start difference. First operand 196 states and 229 transitions. Second operand has 9 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 03:16:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:14,070 INFO L93 Difference]: Finished difference Result 351 states and 406 transitions. [2021-12-16 03:16:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:16:14,071 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 116 [2021-12-16 03:16:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:14,072 INFO L225 Difference]: With dead ends: 351 [2021-12-16 03:16:14,072 INFO L226 Difference]: Without dead ends: 186 [2021-12-16 03:16:14,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:16:14,073 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 12 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:14,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 916 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:16:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-16 03:16:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-12-16 03:16:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 132 states have (on average 1.0757575757575757) internal successors, (142), 135 states have internal predecessors, (142), 32 states have call successors, (32), 18 states have call predecessors, (32), 21 states have return successors, (41), 32 states have call predecessors, (41), 30 states have call successors, (41) [2021-12-16 03:16:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 215 transitions. [2021-12-16 03:16:14,084 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 215 transitions. Word has length 116 [2021-12-16 03:16:14,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:14,085 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 215 transitions. [2021-12-16 03:16:14,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 03:16:14,085 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 215 transitions. [2021-12-16 03:16:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-16 03:16:14,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:14,087 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:14,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-16 03:16:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-16 03:16:14,296 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash -959716687, now seen corresponding path program 1 times [2021-12-16 03:16:14,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:14,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905548765] [2021-12-16 03:16:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:14,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 03:16:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 03:16:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 03:16:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 03:16:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 03:16:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 03:16:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-16 03:16:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-16 03:16:14,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905548765] [2021-12-16 03:16:14,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905548765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:14,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:14,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-16 03:16:14,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71165654] [2021-12-16 03:16:14,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:14,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 03:16:14,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 03:16:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:16:14,786 INFO L87 Difference]: Start difference. First operand 186 states and 215 transitions. Second operand has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-16 03:16:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:15,724 INFO L93 Difference]: Finished difference Result 197 states and 226 transitions. [2021-12-16 03:16:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:16:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 118 [2021-12-16 03:16:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:15,726 INFO L225 Difference]: With dead ends: 197 [2021-12-16 03:16:15,726 INFO L226 Difference]: Without dead ends: 195 [2021-12-16 03:16:15,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-12-16 03:16:15,727 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 162 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:15,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 270 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 03:16:15,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-16 03:16:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2021-12-16 03:16:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 136 states have (on average 1.0735294117647058) internal successors, (146), 139 states have internal predecessors, (146), 33 states have call successors, (33), 19 states have call predecessors, (33), 22 states have return successors, (42), 33 states have call predecessors, (42), 31 states have call successors, (42) [2021-12-16 03:16:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 221 transitions. [2021-12-16 03:16:15,735 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 221 transitions. Word has length 118 [2021-12-16 03:16:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:15,736 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 221 transitions. [2021-12-16 03:16:15,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-16 03:16:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 221 transitions. [2021-12-16 03:16:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-16 03:16:15,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:15,737 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:15,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-16 03:16:15,737 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:15,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1792910273, now seen corresponding path program 2 times [2021-12-16 03:16:15,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:15,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932696664] [2021-12-16 03:16:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:15,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:16:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 03:16:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 03:16:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-16 03:16:16,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:16,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932696664] [2021-12-16 03:16:16,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932696664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:16,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440328241] [2021-12-16 03:16:16,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:16:16,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:16,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:16:16,423 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:16:16,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 03:16:17,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:16:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:16:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 2674 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-16 03:16:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:16:17,758 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 27 treesize of output 15 [2021-12-16 03:16:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 47 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 03:16:17,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:16:18,386 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 35 treesize of output 17 [2021-12-16 03:16:18,482 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-16 03:16:18,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-16 03:16:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-16 03:16:18,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440328241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:16:18,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:16:18,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 14] total 30 [2021-12-16 03:16:18,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917141644] [2021-12-16 03:16:18,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:16:18,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 03:16:18,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 03:16:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-12-16 03:16:18,532 INFO L87 Difference]: Start difference. First operand 192 states and 221 transitions. Second operand has 30 states, 26 states have (on average 5.384615384615385) internal successors, (140), 24 states have internal predecessors, (140), 15 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2021-12-16 03:16:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:20,714 INFO L93 Difference]: Finished difference Result 328 states and 361 transitions. [2021-12-16 03:16:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 03:16:20,714 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 5.384615384615385) internal successors, (140), 24 states have internal predecessors, (140), 15 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) Word has length 118 [2021-12-16 03:16:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:20,715 INFO L225 Difference]: With dead ends: 328 [2021-12-16 03:16:20,716 INFO L226 Difference]: Without dead ends: 222 [2021-12-16 03:16:20,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 229 SyntacticMatches, 17 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=322, Invalid=2540, Unknown=0, NotChecked=0, Total=2862 [2021-12-16 03:16:20,717 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 253 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:20,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 714 Invalid, 2504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2097 Invalid, 0 Unknown, 300 Unchecked, 1.3s Time] [2021-12-16 03:16:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-16 03:16:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2021-12-16 03:16:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 155 states have (on average 1.070967741935484) internal successors, (166), 158 states have internal predecessors, (166), 33 states have call successors, (33), 21 states have call predecessors, (33), 24 states have return successors, (42), 33 states have call predecessors, (42), 31 states have call successors, (42) [2021-12-16 03:16:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 241 transitions. [2021-12-16 03:16:20,731 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 241 transitions. Word has length 118 [2021-12-16 03:16:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:20,731 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 241 transitions. [2021-12-16 03:16:20,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 5.384615384615385) internal successors, (140), 24 states have internal predecessors, (140), 15 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2021-12-16 03:16:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 241 transitions. [2021-12-16 03:16:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-16 03:16:20,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:20,732 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:20,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-16 03:16:20,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-16 03:16:20,950 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:20,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1201655876, now seen corresponding path program 1 times [2021-12-16 03:16:20,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:20,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153071575] [2021-12-16 03:16:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:20,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:16:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 03:16:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 03:16:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-16 03:16:21,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:21,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153071575] [2021-12-16 03:16:21,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153071575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:16:21,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:16:21,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:16:21,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171460060] [2021-12-16 03:16:21,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:16:21,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:16:21,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:16:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:16:21,146 INFO L87 Difference]: Start difference. First operand 213 states and 241 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-16 03:16:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:16:21,361 INFO L93 Difference]: Finished difference Result 309 states and 335 transitions. [2021-12-16 03:16:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:16:21,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-12-16 03:16:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:16:21,363 INFO L225 Difference]: With dead ends: 309 [2021-12-16 03:16:21,363 INFO L226 Difference]: Without dead ends: 203 [2021-12-16 03:16:21,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:16:21,363 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 109 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:16:21,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 180 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:16:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-16 03:16:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-12-16 03:16:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 148 states have (on average 1.0675675675675675) internal successors, (158), 150 states have internal predecessors, (158), 31 states have call successors, (31), 21 states have call predecessors, (31), 22 states have return successors, (36), 30 states have call predecessors, (36), 29 states have call successors, (36) [2021-12-16 03:16:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 225 transitions. [2021-12-16 03:16:21,374 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 225 transitions. Word has length 119 [2021-12-16 03:16:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:16:21,375 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 225 transitions. [2021-12-16 03:16:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-16 03:16:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 225 transitions. [2021-12-16 03:16:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 03:16:21,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:16:21,376 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:16:21,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-16 03:16:21,377 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:16:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:16:21,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1430669570, now seen corresponding path program 1 times [2021-12-16 03:16:21,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:16:21,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441550187] [2021-12-16 03:16:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:21,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:16:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:21,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:16:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:16:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 03:16:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 03:16:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 03:16:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 03:16:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 03:16:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 03:16:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:16:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 03:16:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 03:16:22,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:16:22,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441550187] [2021-12-16 03:16:22,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441550187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:22,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034759440] [2021-12-16 03:16:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:16:22,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:16:22,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:16:22,732 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:16:22,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 03:16:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:16:23,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-16 03:16:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:16:23,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 03:16:23,477 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 03:16:23,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 03:16:23,492 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 6 treesize of output 5 [2021-12-16 03:16:23,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 03:16:25,524 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_reset_harness_~#buf~3#1.base_BEFORE_CALL_17| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_reset_harness_~#buf~3#1.base_BEFORE_CALL_17| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_reset_harness_~#buf~3#1.base_BEFORE_CALL_17|) 8)))) is different from true [2021-12-16 03:16:27,575 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_reset_harness_~#buf~3#1.base_BEFORE_CALL_18| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_reset_harness_~#buf~3#1.base_BEFORE_CALL_18| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_reset_harness_~#buf~3#1.base_BEFORE_CALL_18|) 8)))) is different from true [2021-12-16 03:16:29,699 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_8| Int)) (not (= |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_8| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_8|) 8)))) is different from true [2021-12-16 03:16:36,211 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 20 treesize of output 8 [2021-12-16 03:16:36,409 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1351 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memset_impl_#in~s.base| v_ArrVal_1351))) is different from true [2021-12-16 03:16:36,423 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1351 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memset_#in~s.base| v_ArrVal_1351))) is different from true [2021-12-16 03:16:36,447 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 26 treesize of output 26 [2021-12-16 03:16:36,467 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 31 treesize of output 26 [2021-12-16 03:16:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 28 refuted. 6 times theorem prover too weak. 4 trivial. 42 not checked. [2021-12-16 03:16:40,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:16:41,265 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1359 (Array Int Int))) (not (= 0 (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_ArrVal_1359) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ |c_aws_byte_buf_secure_zero_~buf#1.offset| 16)) 18446744073709551616)))) is different from false [2021-12-16 03:16:41,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034759440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:16:41,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:16:41,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 55 [2021-12-16 03:16:41,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261340658] [2021-12-16 03:16:41,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 03:16:41,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-16 03:16:41,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:16:41,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-16 03:16:41,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2681, Unknown=8, NotChecked=654, Total=3540 [2021-12-16 03:16:41,269 INFO L87 Difference]: Start difference. First operand 202 states and 225 transitions. Second operand has 55 states, 49 states have (on average 3.306122448979592) internal successors, (162), 45 states have internal predecessors, (162), 18 states have call successors, (25), 14 states have call predecessors, (25), 15 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22)