./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_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_hash_byte_cursor_ptr_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 ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:27:48,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:27:48,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:27:48,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:27:48,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:27:48,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:27:48,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:27:48,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:27:48,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:27:48,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:27:48,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:27:48,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:27:48,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:27:48,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:27:48,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:27:48,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:27:48,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:27:48,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:27:48,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:27:48,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:27:48,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:27:48,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:27:49,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:27:49,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:27:49,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:27:49,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:27:49,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:27:49,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:27:49,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:27:49,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:27:49,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:27:49,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:27:49,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:27:49,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:27:49,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:27:49,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:27:49,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:27:49,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:27:49,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:27:49,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:27:49,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:27:49,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-18 00:27:49,024 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:27:49,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:27:49,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:27:49,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:27:49,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:27:49,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:27:49,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:27:49,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:27:49,026 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:27:49,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:27:49,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 00:27:49,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:27:49,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:27:49,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:27:49,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:27:49,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:27:49,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:27:49,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:27:49,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:27:49,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:27:49,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:27:49,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:27:49,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:27:49,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:27:49,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:27:49,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 00:27:49,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 00:27:49,029 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:27:49,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:27:49,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:27:49,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:27:49,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 [2021-12-18 00:27:49,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:27:49,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:27:49,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:27:49,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:27:49,245 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:27:49,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-18 00:27:49,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2389466cd/0a2987726fef4bc8a856d695e0f473bd/FLAG4f51a2746 [2021-12-18 00:27:49,859 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:27:49,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-18 00:27:49,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2389466cd/0a2987726fef4bc8a856d695e0f473bd/FLAG4f51a2746 [2021-12-18 00:27:50,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2389466cd/0a2987726fef4bc8a856d695e0f473bd [2021-12-18 00:27:50,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:27:50,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:27:50,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:27:50,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:27:50,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:27:50,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:27:50" (1/1) ... [2021-12-18 00:27:50,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee62979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:50, skipping insertion in model container [2021-12-18 00:27:50,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:27:50" (1/1) ... [2021-12-18 00:27:50,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:27:50,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:27:50,376 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_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-18 00:27:50,383 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_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-18 00:27:50,994 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:50,995 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:50,995 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:50,997 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:50,997 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,011 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,015 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,016 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,017 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,329 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:27:51,330 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:27:51,331 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:27:51,333 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:27:51,338 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:27:51,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:27:51,342 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:27:51,342 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:27:51,344 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:27:51,345 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:27:51,460 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:27:51,530 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,531 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,752 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,752 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,774 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,776 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,785 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,786 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,799 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,802 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,802 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,803 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,803 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:27:51,870 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:27:51,887 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_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-18 00:27:51,887 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_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-18 00:27:51,914 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,915 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,915 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,915 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,916 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,919 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,920 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,921 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,921 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:51,966 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:27:51,967 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:27:51,968 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:27:51,969 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:27:51,969 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:27:51,969 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:27:51,970 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:27:51,970 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:27:51,970 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:27:51,970 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:27:51,988 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:27:52,019 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,021 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,078 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,078 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,082 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,083 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,085 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,086 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,090 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,093 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:27:52,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:27:52,283 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:27:52,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52 WrapperNode [2021-12-18 00:27:52,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:27:52,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:27:52,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:27:52,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:27:52,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,432 INFO L137 Inliner]: procedures = 776, calls = 3576, calls flagged for inlining = 77, calls inlined = 6, statements flattened = 787 [2021-12-18 00:27:52,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:27:52,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:27:52,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:27:52,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:27:52,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:27:52,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:27:52,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:27:52,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:27:52,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (1/1) ... [2021-12-18 00:27:52,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:27:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:27:52,570 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) [2021-12-18 00:27:52,576 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 [2021-12-18 00:27:52,597 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-18 00:27:52,598 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-18 00:27:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 00:27:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:27:52,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:27:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 00:27:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:27:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:27:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:27:52,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:27:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-18 00:27:52,599 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-18 00:27:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:27:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:27:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure hashlittle2 [2021-12-18 00:27:52,600 INFO L138 BoogieDeclarations]: Found implementation of procedure hashlittle2 [2021-12-18 00:27:52,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 00:27:52,600 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-18 00:27:52,600 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-18 00:27:52,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:27:52,600 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:27:52,601 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:27:52,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:27:52,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 00:27:52,793 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:27:52,794 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:27:53,342 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2021-12-18 00:27:53,347 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:27:53,354 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:27:53,355 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-18 00:27:53,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:27:53 BoogieIcfgContainer [2021-12-18 00:27:53,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:27:53,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:27:53,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:27:53,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:27:53,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:27:50" (1/3) ... [2021-12-18 00:27:53,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab39d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:27:53, skipping insertion in model container [2021-12-18 00:27:53,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:27:52" (2/3) ... [2021-12-18 00:27:53,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab39d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:27:53, skipping insertion in model container [2021-12-18 00:27:53,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:27:53" (3/3) ... [2021-12-18 00:27:53,362 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_byte_cursor_ptr_harness.i [2021-12-18 00:27:53,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:27:53,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:27:53,404 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:27:53,408 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 [2021-12-18 00:27:53,408 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:27:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 00:27:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 00:27:53,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:27:53,434 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:27:53,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:27:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:27:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1196197405, now seen corresponding path program 1 times [2021-12-18 00:27:53,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:27:53,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276622842] [2021-12-18 00:27:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:53,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:27:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:53,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:27:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:53,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:27:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:53,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:27:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:53,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:27:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:53,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:27:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:53,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:27:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:53,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-18 00:27:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:53,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:27:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-18 00:27:53,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:27:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276622842] [2021-12-18 00:27:53,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276622842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:27:53,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:27:53,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 00:27:53,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915015565] [2021-12-18 00:27:53,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:27:53,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 00:27:53,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:27:54,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 00:27:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 00:27:54,021 INFO L87 Difference]: Start difference. First operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:27:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:27:54,225 INFO L93 Difference]: Finished difference Result 263 states and 398 transitions. [2021-12-18 00:27:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 00:27:54,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-18 00:27:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:27:54,234 INFO L225 Difference]: With dead ends: 263 [2021-12-18 00:27:54,234 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 00:27:54,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 00:27:54,239 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 28 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:27:54,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 273 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:27:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 00:27:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-18 00:27:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 109 states have internal predecessors, (161), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-18 00:27:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2021-12-18 00:27:54,287 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 62 [2021-12-18 00:27:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:27:54,287 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2021-12-18 00:27:54,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:27:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2021-12-18 00:27:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 00:27:54,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:27:54,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:27:54,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 00:27:54,294 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:27:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:27:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash -902599839, now seen corresponding path program 1 times [2021-12-18 00:27:54,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:27:54,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229559278] [2021-12-18 00:27:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:54,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:27:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:27:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:27:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:27:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:27:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:27:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:27:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-18 00:27:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:27:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-18 00:27:54,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:27:54,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229559278] [2021-12-18 00:27:54,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229559278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:27:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818338366] [2021-12-18 00:27:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:54,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:27:54,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:27:54,562 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) [2021-12-18 00:27:54,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 00:27:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 00:27:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:27:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 00:27:55,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:27:55,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818338366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:27:55,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:27:55,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-18 00:27:55,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767487600] [2021-12-18 00:27:55,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:27:55,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 00:27:55,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:27:55,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 00:27:55,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-18 00:27:55,195 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:27:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:27:55,314 INFO L93 Difference]: Finished difference Result 239 states and 354 transitions. [2021-12-18 00:27:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:27:55,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-18 00:27:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:27:55,320 INFO L225 Difference]: With dead ends: 239 [2021-12-18 00:27:55,320 INFO L226 Difference]: Without dead ends: 131 [2021-12-18 00:27:55,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:27:55,327 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 197 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:27:55,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 636 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:27:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-18 00:27:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-18 00:27:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-18 00:27:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2021-12-18 00:27:55,351 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 62 [2021-12-18 00:27:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:27:55,353 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2021-12-18 00:27:55,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:27:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2021-12-18 00:27:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 00:27:55,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:27:55,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:27:55,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 00:27:55,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:27:55,577 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:27:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:27:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash 90546502, now seen corresponding path program 1 times [2021-12-18 00:27:55,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:27:55,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84961270] [2021-12-18 00:27:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:55,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:27:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:55,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:27:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:55,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:27:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:55,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:27:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:55,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:27:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:55,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:27:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:55,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:27:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:55,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:27:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:55,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:27:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-18 00:27:55,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:27:55,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84961270] [2021-12-18 00:27:55,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84961270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:27:55,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268540360] [2021-12-18 00:27:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:55,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:27:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:27:55,875 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) [2021-12-18 00:27:55,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 00:27:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 00:27:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:27:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 00:27:56,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:27:56,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268540360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:27:56,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:27:56,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-18 00:27:56,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749034608] [2021-12-18 00:27:56,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:27:56,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:27:56,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:27:56,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:27:56,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-18 00:27:56,375 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:27:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:27:56,462 INFO L93 Difference]: Finished difference Result 239 states and 350 transitions. [2021-12-18 00:27:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:27:56,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-12-18 00:27:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:27:56,465 INFO L225 Difference]: With dead ends: 239 [2021-12-18 00:27:56,465 INFO L226 Difference]: Without dead ends: 131 [2021-12-18 00:27:56,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:27:56,469 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 201 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:27:56,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 649 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:27:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-18 00:27:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-18 00:27:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-18 00:27:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2021-12-18 00:27:56,485 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 64 [2021-12-18 00:27:56,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:27:56,486 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2021-12-18 00:27:56,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:27:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2021-12-18 00:27:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 00:27:56,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:27:56,489 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:27:56,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 00:27:56,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-18 00:27:56,703 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:27:56,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:27:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash -249804501, now seen corresponding path program 2 times [2021-12-18 00:27:56,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:27:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847199698] [2021-12-18 00:27:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:56,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:27:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:27:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:27:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:27:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:27:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:27:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:27:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:27:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-18 00:27:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:27:56,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:27:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847199698] [2021-12-18 00:27:56,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847199698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:27:56,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:27:56,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 00:27:56,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715032354] [2021-12-18 00:27:56,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:27:56,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:27:56,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:27:56,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:27:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 00:27:56,908 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:27:57,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:27:57,118 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2021-12-18 00:27:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:27:57,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 66 [2021-12-18 00:27:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:27:57,119 INFO L225 Difference]: With dead ends: 158 [2021-12-18 00:27:57,119 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 00:27:57,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-18 00:27:57,120 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 58 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:27:57,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 826 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:27:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 00:27:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-18 00:27:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 109 states have internal predecessors, (160), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-18 00:27:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2021-12-18 00:27:57,125 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 66 [2021-12-18 00:27:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:27:57,125 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2021-12-18 00:27:57,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:27:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2021-12-18 00:27:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:27:57,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:27:57,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:27:57,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 00:27:57,126 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:27:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:27:57,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1967970000, now seen corresponding path program 1 times [2021-12-18 00:27:57,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:27:57,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474399194] [2021-12-18 00:27:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:57,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:27:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:27:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:27:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:27:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:27:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:27:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:27:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:27:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-18 00:27:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:27:57,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:27:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474399194] [2021-12-18 00:27:57,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474399194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:27:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316396995] [2021-12-18 00:27:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:57,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:27:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:27:57,461 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) [2021-12-18 00:27:57,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 00:27:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:57,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 00:27:57,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:27:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-18 00:27:58,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:27:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 00:27:58,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316396995] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-18 00:27:58,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:27:58,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 25 [2021-12-18 00:27:58,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903883164] [2021-12-18 00:27:58,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:27:58,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:27:58,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:27:58,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:27:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-12-18 00:27:58,291 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-18 00:27:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:27:58,356 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2021-12-18 00:27:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:27:58,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2021-12-18 00:27:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:27:58,357 INFO L225 Difference]: With dead ends: 140 [2021-12-18 00:27:58,357 INFO L226 Difference]: Without dead ends: 138 [2021-12-18 00:27:58,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-12-18 00:27:58,358 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 17 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:27:58,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1245 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:27:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-18 00:27:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-18 00:27:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 114 states have (on average 1.456140350877193) internal successors, (166), 116 states have internal predecessors, (166), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2021-12-18 00:27:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 197 transitions. [2021-12-18 00:27:58,365 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 197 transitions. Word has length 68 [2021-12-18 00:27:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:27:58,367 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 197 transitions. [2021-12-18 00:27:58,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-18 00:27:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 197 transitions. [2021-12-18 00:27:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 00:27:58,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:27:58,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:27:58,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 00:27:58,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:27:58,590 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:27:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:27:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash -278658024, now seen corresponding path program 1 times [2021-12-18 00:27:58,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:27:58,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046607569] [2021-12-18 00:27:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:58,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:27:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:58,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:27:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:58,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:27:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:58,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:27:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:58,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:27:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:58,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:27:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:58,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:27:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:58,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:27:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:58,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-18 00:27:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:27:58,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:27:58,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046607569] [2021-12-18 00:27:58,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046607569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:27:58,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825435536] [2021-12-18 00:27:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:27:58,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:27:58,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:27:58,961 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) [2021-12-18 00:27:58,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 00:27:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:27:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 00:27:59,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:27:59,353 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 [2021-12-18 00:28:00,047 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:00,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:00,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:00,460 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:28:00,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 38 [2021-12-18 00:28:00,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:00,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:00,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825435536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:00,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:00,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:00,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820747750] [2021-12-18 00:28:00,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:00,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:00,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:00,760 INFO L87 Difference]: Start difference. First operand 137 states and 197 transitions. Second operand has 26 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 22 states have internal predecessors, (91), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:01,757 INFO L93 Difference]: Finished difference Result 235 states and 330 transitions. [2021-12-18 00:28:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 00:28:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 22 states have internal predecessors, (91), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 72 [2021-12-18 00:28:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:01,759 INFO L225 Difference]: With dead ends: 235 [2021-12-18 00:28:01,759 INFO L226 Difference]: Without dead ends: 200 [2021-12-18 00:28:01,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=2021, Unknown=1, NotChecked=0, Total=2256 [2021-12-18 00:28:01,761 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 61 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:01,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1933 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 947 Invalid, 0 Unknown, 519 Unchecked, 0.6s Time] [2021-12-18 00:28:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-18 00:28:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 179. [2021-12-18 00:28:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 143 states have (on average 1.3916083916083917) internal successors, (199), 147 states have internal predecessors, (199), 22 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (29), 20 states have call predecessors, (29), 21 states have call successors, (29) [2021-12-18 00:28:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 250 transitions. [2021-12-18 00:28:01,770 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 250 transitions. Word has length 72 [2021-12-18 00:28:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:01,770 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 250 transitions. [2021-12-18 00:28:01,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 22 states have internal predecessors, (91), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 250 transitions. [2021-12-18 00:28:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 00:28:01,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:01,772 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:28:01,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:01,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:01,986 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1208498679, now seen corresponding path program 1 times [2021-12-18 00:28:01,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:01,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102605641] [2021-12-18 00:28:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:01,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:28:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:02,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102605641] [2021-12-18 00:28:02,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102605641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618618931] [2021-12-18 00:28:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:02,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:02,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:02,261 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) [2021-12-18 00:28:02,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 00:28:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:02,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 00:28:02,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:02,641 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 [2021-12-18 00:28:03,220 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-18 00:28:03,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 34 [2021-12-18 00:28:03,606 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-12-18 00:28:03,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 44 [2021-12-18 00:28:03,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:03,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:03,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618618931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:03,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:03,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:03,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177757885] [2021-12-18 00:28:03,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:03,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:03,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=835, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:03,925 INFO L87 Difference]: Start difference. First operand 179 states and 250 transitions. Second operand has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:04,798 INFO L93 Difference]: Finished difference Result 286 states and 409 transitions. [2021-12-18 00:28:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 00:28:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 73 [2021-12-18 00:28:04,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:04,806 INFO L225 Difference]: With dead ends: 286 [2021-12-18 00:28:04,807 INFO L226 Difference]: Without dead ends: 251 [2021-12-18 00:28:04,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=1940, Unknown=1, NotChecked=0, Total=2162 [2021-12-18 00:28:04,808 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 202 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2110 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:04,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 2886 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 773 Invalid, 0 Unknown, 2110 Unchecked, 0.5s Time] [2021-12-18 00:28:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-18 00:28:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 180. [2021-12-18 00:28:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 144 states have (on average 1.3958333333333333) internal successors, (201), 148 states have internal predecessors, (201), 22 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (29), 20 states have call predecessors, (29), 21 states have call successors, (29) [2021-12-18 00:28:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 252 transitions. [2021-12-18 00:28:04,824 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 252 transitions. Word has length 73 [2021-12-18 00:28:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:04,824 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 252 transitions. [2021-12-18 00:28:04,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 252 transitions. [2021-12-18 00:28:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 00:28:04,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:04,827 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:28:04,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:05,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:05,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash -994417807, now seen corresponding path program 1 times [2021-12-18 00:28:05,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:05,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219740291] [2021-12-18 00:28:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:05,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-18 00:28:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:05,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219740291] [2021-12-18 00:28:05,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219740291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011842041] [2021-12-18 00:28:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:05,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:05,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:05,308 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) [2021-12-18 00:28:05,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 00:28:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 2590 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 00:28:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:06,055 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 17 treesize of output 9 [2021-12-18 00:28:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:06,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:06,382 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-18 00:28:06,383 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 20 treesize of output 19 [2021-12-18 00:28:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:06,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011842041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:28:06,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:28:06,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 27 [2021-12-18 00:28:06,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116210249] [2021-12-18 00:28:06,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:06,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 00:28:06,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 00:28:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-12-18 00:28:06,411 INFO L87 Difference]: Start difference. First operand 180 states and 252 transitions. Second operand has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-18 00:28:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:08,411 INFO L93 Difference]: Finished difference Result 387 states and 561 transitions. [2021-12-18 00:28:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 00:28:08,412 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) Word has length 73 [2021-12-18 00:28:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:08,414 INFO L225 Difference]: With dead ends: 387 [2021-12-18 00:28:08,414 INFO L226 Difference]: Without dead ends: 352 [2021-12-18 00:28:08,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 139 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 00:28:08,415 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 523 mSDsluCounter, 2053 mSDsCounter, 0 mSdLazyCounter, 3229 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 3229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:08,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 2257 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 3229 Invalid, 0 Unknown, 570 Unchecked, 1.5s Time] [2021-12-18 00:28:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-18 00:28:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 242. [2021-12-18 00:28:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 208 states have (on average 1.4759615384615385) internal successors, (307), 212 states have internal predecessors, (307), 20 states have call successors, (20), 11 states have call predecessors, (20), 13 states have return successors, (25), 18 states have call predecessors, (25), 19 states have call successors, (25) [2021-12-18 00:28:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 352 transitions. [2021-12-18 00:28:08,433 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 352 transitions. Word has length 73 [2021-12-18 00:28:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:08,434 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 352 transitions. [2021-12-18 00:28:08,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-18 00:28:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 352 transitions. [2021-12-18 00:28:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-18 00:28:08,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:08,437 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-12-18 00:28:08,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:08,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:08,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:08,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1569134765, now seen corresponding path program 1 times [2021-12-18 00:28:08,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:08,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287377218] [2021-12-18 00:28:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:08,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:08,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:08,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:08,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:08,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:08,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:08,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:08,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:08,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-18 00:28:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:08,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:08,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287377218] [2021-12-18 00:28:08,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287377218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:08,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912889932] [2021-12-18 00:28:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:08,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:08,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:08,920 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) [2021-12-18 00:28:08,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 00:28:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:09,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 00:28:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:09,275 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 [2021-12-18 00:28:09,863 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:09,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:10,220 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:28:10,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-18 00:28:10,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:10,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:10,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912889932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:10,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:10,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:10,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837604317] [2021-12-18 00:28:10,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:10,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:10,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:10,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:10,518 INFO L87 Difference]: Start difference. First operand 242 states and 352 transitions. Second operand has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:11,440 INFO L93 Difference]: Finished difference Result 368 states and 532 transitions. [2021-12-18 00:28:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 00:28:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 74 [2021-12-18 00:28:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:11,450 INFO L225 Difference]: With dead ends: 368 [2021-12-18 00:28:11,450 INFO L226 Difference]: Without dead ends: 333 [2021-12-18 00:28:11,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=2103, Unknown=1, NotChecked=0, Total=2352 [2021-12-18 00:28:11,453 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 154 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1316 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:11,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1946 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 872 Invalid, 0 Unknown, 1316 Unchecked, 0.5s Time] [2021-12-18 00:28:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-18 00:28:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 242. [2021-12-18 00:28:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 208 states have (on average 1.4759615384615385) internal successors, (307), 212 states have internal predecessors, (307), 20 states have call successors, (20), 11 states have call predecessors, (20), 13 states have return successors, (25), 18 states have call predecessors, (25), 19 states have call successors, (25) [2021-12-18 00:28:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 352 transitions. [2021-12-18 00:28:11,468 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 352 transitions. Word has length 74 [2021-12-18 00:28:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:11,469 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 352 transitions. [2021-12-18 00:28:11,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 352 transitions. [2021-12-18 00:28:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-18 00:28:11,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:11,470 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-12-18 00:28:11,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:11,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:11,690 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash -7761607, now seen corresponding path program 1 times [2021-12-18 00:28:11,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:11,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51281253] [2021-12-18 00:28:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:11,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:11,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:11,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:11,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:11,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:11,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:11,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:11,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:11,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-18 00:28:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:11,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51281253] [2021-12-18 00:28:11,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51281253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317743251] [2021-12-18 00:28:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:11,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:11,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:11,989 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) [2021-12-18 00:28:11,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 00:28:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 00:28:12,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:12,343 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 [2021-12-18 00:28:12,906 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:12,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:13,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:13,270 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:28:13,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-18 00:28:13,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:13,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:13,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317743251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:13,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:13,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:13,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101397233] [2021-12-18 00:28:13,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:13,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:13,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:13,544 INFO L87 Difference]: Start difference. First operand 242 states and 352 transitions. Second operand has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:14,314 INFO L93 Difference]: Finished difference Result 319 states and 444 transitions. [2021-12-18 00:28:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 00:28:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 74 [2021-12-18 00:28:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:14,317 INFO L225 Difference]: With dead ends: 319 [2021-12-18 00:28:14,317 INFO L226 Difference]: Without dead ends: 284 [2021-12-18 00:28:14,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=1850, Unknown=1, NotChecked=0, Total=2070 [2021-12-18 00:28:14,318 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 86 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:14,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1269 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 684 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2021-12-18 00:28:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-18 00:28:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 242. [2021-12-18 00:28:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 208 states have (on average 1.4759615384615385) internal successors, (307), 212 states have internal predecessors, (307), 20 states have call successors, (20), 11 states have call predecessors, (20), 13 states have return successors, (25), 18 states have call predecessors, (25), 19 states have call successors, (25) [2021-12-18 00:28:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 352 transitions. [2021-12-18 00:28:14,331 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 352 transitions. Word has length 74 [2021-12-18 00:28:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:14,331 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 352 transitions. [2021-12-18 00:28:14,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 352 transitions. [2021-12-18 00:28:14,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-18 00:28:14,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:14,333 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-18 00:28:14,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:14,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 00:28:14,547 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1464298396, now seen corresponding path program 1 times [2021-12-18 00:28:14,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603304590] [2021-12-18 00:28:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:14,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:14,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:14,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:14,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:14,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:14,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:14,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:14,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:14,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-18 00:28:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:14,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:14,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603304590] [2021-12-18 00:28:14,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603304590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:14,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986618643] [2021-12-18 00:28:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:14,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:14,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:14,792 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) [2021-12-18 00:28:14,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 00:28:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:15,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 00:28:15,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:15,162 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 [2021-12-18 00:28:15,762 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:15,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:16,114 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:28:16,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-18 00:28:16,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:16,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:16,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986618643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:16,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:16,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:16,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424762227] [2021-12-18 00:28:16,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:16,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:16,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:16,417 INFO L87 Difference]: Start difference. First operand 242 states and 352 transitions. Second operand has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:17,100 INFO L93 Difference]: Finished difference Result 314 states and 444 transitions. [2021-12-18 00:28:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 00:28:17,101 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 75 [2021-12-18 00:28:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:17,103 INFO L225 Difference]: With dead ends: 314 [2021-12-18 00:28:17,103 INFO L226 Difference]: Without dead ends: 279 [2021-12-18 00:28:17,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=1773, Unknown=1, NotChecked=0, Total=1980 [2021-12-18 00:28:17,106 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 61 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:17,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1616 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 591 Invalid, 0 Unknown, 466 Unchecked, 0.4s Time] [2021-12-18 00:28:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-18 00:28:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 248. [2021-12-18 00:28:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 217 states have internal predecessors, (311), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-18 00:28:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 360 transitions. [2021-12-18 00:28:17,129 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 360 transitions. Word has length 75 [2021-12-18 00:28:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:17,130 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 360 transitions. [2021-12-18 00:28:17,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 360 transitions. [2021-12-18 00:28:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-18 00:28:17,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:17,131 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-12-18 00:28:17,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:17,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:17,343 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash 185282190, now seen corresponding path program 1 times [2021-12-18 00:28:17,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551233543] [2021-12-18 00:28:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:17,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 00:28:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:17,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:17,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551233543] [2021-12-18 00:28:17,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551233543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:17,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612957375] [2021-12-18 00:28:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:17,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:17,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:17,600 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) [2021-12-18 00:28:17,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 00:28:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:17,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 00:28:17,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:18,003 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 [2021-12-18 00:28:18,570 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:18,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:18,930 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:28:18,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-18 00:28:18,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:18,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:19,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612957375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:19,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:19,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:19,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224581191] [2021-12-18 00:28:19,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:19,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:19,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:19,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:19,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:19,209 INFO L87 Difference]: Start difference. First operand 248 states and 360 transitions. Second operand has 26 states, 24 states have (on average 4.125) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:20,077 INFO L93 Difference]: Finished difference Result 327 states and 470 transitions. [2021-12-18 00:28:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 00:28:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.125) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 76 [2021-12-18 00:28:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:20,081 INFO L225 Difference]: With dead ends: 327 [2021-12-18 00:28:20,081 INFO L226 Difference]: Without dead ends: 292 [2021-12-18 00:28:20,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=2017, Unknown=1, NotChecked=0, Total=2256 [2021-12-18 00:28:20,084 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 65 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:20,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1963 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 865 Invalid, 0 Unknown, 522 Unchecked, 0.5s Time] [2021-12-18 00:28:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-18 00:28:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 248. [2021-12-18 00:28:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 217 states have internal predecessors, (311), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-18 00:28:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 360 transitions. [2021-12-18 00:28:20,103 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 360 transitions. Word has length 76 [2021-12-18 00:28:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:20,104 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 360 transitions. [2021-12-18 00:28:20,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.125) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 360 transitions. [2021-12-18 00:28:20,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 00:28:20,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:20,105 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-18 00:28:20,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:20,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-18 00:28:20,319 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1817674049, now seen corresponding path program 1 times [2021-12-18 00:28:20,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:20,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993706168] [2021-12-18 00:28:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:20,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-18 00:28:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:20,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993706168] [2021-12-18 00:28:20,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993706168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358601417] [2021-12-18 00:28:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:20,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:20,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:20,565 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) [2021-12-18 00:28:20,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 00:28:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-18 00:28:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:20,979 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 [2021-12-18 00:28:21,540 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:21,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:21,940 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:28:21,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 38 [2021-12-18 00:28:21,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:21,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:22,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358601417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:22,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:22,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:22,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560559239] [2021-12-18 00:28:22,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:22,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:22,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:22,220 INFO L87 Difference]: Start difference. First operand 248 states and 360 transitions. Second operand has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:22,978 INFO L93 Difference]: Finished difference Result 365 states and 520 transitions. [2021-12-18 00:28:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 00:28:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2021-12-18 00:28:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:22,980 INFO L225 Difference]: With dead ends: 365 [2021-12-18 00:28:22,980 INFO L226 Difference]: Without dead ends: 330 [2021-12-18 00:28:22,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=1849, Unknown=1, NotChecked=0, Total=2070 [2021-12-18 00:28:22,982 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 208 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1088 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:22,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1874 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 755 Invalid, 0 Unknown, 1088 Unchecked, 0.4s Time] [2021-12-18 00:28:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-18 00:28:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 248. [2021-12-18 00:28:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 217 states have internal predecessors, (311), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-18 00:28:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 360 transitions. [2021-12-18 00:28:22,994 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 360 transitions. Word has length 77 [2021-12-18 00:28:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:22,994 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 360 transitions. [2021-12-18 00:28:22,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 360 transitions. [2021-12-18 00:28:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 00:28:22,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:22,998 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-18 00:28:23,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:23,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 00:28:23,215 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1265263437, now seen corresponding path program 1 times [2021-12-18 00:28:23,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:23,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062178358] [2021-12-18 00:28:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:23,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-18 00:28:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:23,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:23,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062178358] [2021-12-18 00:28:23,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062178358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:23,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750147266] [2021-12-18 00:28:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:23,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:23,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:23,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:23,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 00:28:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:23,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-18 00:28:23,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:23,866 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 [2021-12-18 00:28:24,341 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:24,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:24,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:24,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 28 [2021-12-18 00:28:24,617 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-18 00:28:24,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-18 00:28:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 00:28:24,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:25,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750147266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:25,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:25,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2021-12-18 00:28:25,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641090538] [2021-12-18 00:28:25,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:25,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 00:28:25,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 00:28:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1073, Unknown=5, NotChecked=0, Total=1190 [2021-12-18 00:28:25,096 INFO L87 Difference]: Start difference. First operand 248 states and 360 transitions. Second operand has 30 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 25 states have internal predecessors, (102), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:28:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:26,092 INFO L93 Difference]: Finished difference Result 356 states and 497 transitions. [2021-12-18 00:28:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 00:28:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 25 states have internal predecessors, (102), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) Word has length 77 [2021-12-18 00:28:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:26,095 INFO L225 Difference]: With dead ends: 356 [2021-12-18 00:28:26,095 INFO L226 Difference]: Without dead ends: 321 [2021-12-18 00:28:26,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=2702, Unknown=15, NotChecked=0, Total=2970 [2021-12-18 00:28:26,096 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 63 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 623 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:26,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1960 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 925 Invalid, 0 Unknown, 623 Unchecked, 0.5s Time] [2021-12-18 00:28:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-18 00:28:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 292. [2021-12-18 00:28:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 243 states have (on average 1.4197530864197532) internal successors, (345), 249 states have internal predecessors, (345), 27 states have call successors, (27), 17 states have call predecessors, (27), 21 states have return successors, (37), 25 states have call predecessors, (37), 26 states have call successors, (37) [2021-12-18 00:28:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 409 transitions. [2021-12-18 00:28:26,111 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 409 transitions. Word has length 77 [2021-12-18 00:28:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:26,112 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 409 transitions. [2021-12-18 00:28:26,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 25 states have internal predecessors, (102), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:28:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 409 transitions. [2021-12-18 00:28:26,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 00:28:26,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:26,114 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-18 00:28:26,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:26,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-18 00:28:26,334 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1399276943, now seen corresponding path program 1 times [2021-12-18 00:28:26,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:26,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942836517] [2021-12-18 00:28:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:26,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-18 00:28:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:26,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:26,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942836517] [2021-12-18 00:28:26,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942836517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:26,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17942416] [2021-12-18 00:28:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:26,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:26,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:26,574 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:26,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 00:28:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-18 00:28:26,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:26,976 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 [2021-12-18 00:28:27,520 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-12-18 00:28:27,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 30 [2021-12-18 00:28:27,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:27,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:27,901 INFO L354 Elim1Store]: treesize reduction 71, result has 1.4 percent of original size [2021-12-18 00:28:27,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 23 [2021-12-18 00:28:27,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:27,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:28,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17942416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:28,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:28,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2021-12-18 00:28:28,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966295389] [2021-12-18 00:28:28,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:28,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 00:28:28,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 00:28:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=950, Unknown=1, NotChecked=0, Total=1056 [2021-12-18 00:28:28,195 INFO L87 Difference]: Start difference. First operand 292 states and 409 transitions. Second operand has 28 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 24 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:29,031 INFO L93 Difference]: Finished difference Result 355 states and 490 transitions. [2021-12-18 00:28:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 00:28:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 24 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2021-12-18 00:28:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:29,032 INFO L225 Difference]: With dead ends: 355 [2021-12-18 00:28:29,033 INFO L226 Difference]: Without dead ends: 320 [2021-12-18 00:28:29,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=2209, Unknown=2, NotChecked=0, Total=2450 [2021-12-18 00:28:29,034 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 90 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 457 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:29,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1664 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 869 Invalid, 0 Unknown, 457 Unchecked, 0.5s Time] [2021-12-18 00:28:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-18 00:28:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 290. [2021-12-18 00:28:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 241 states have (on average 1.4190871369294606) internal successors, (342), 247 states have internal predecessors, (342), 27 states have call successors, (27), 17 states have call predecessors, (27), 21 states have return successors, (37), 25 states have call predecessors, (37), 26 states have call successors, (37) [2021-12-18 00:28:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 406 transitions. [2021-12-18 00:28:29,046 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 406 transitions. Word has length 77 [2021-12-18 00:28:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:29,047 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 406 transitions. [2021-12-18 00:28:29,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 24 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 406 transitions. [2021-12-18 00:28:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-18 00:28:29,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:29,049 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-12-18 00:28:29,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:29,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 00:28:29,256 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1085154871, now seen corresponding path program 1 times [2021-12-18 00:28:29,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:29,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231749569] [2021-12-18 00:28:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:29,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:28:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:29,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:29,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231749569] [2021-12-18 00:28:29,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231749569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:29,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055745652] [2021-12-18 00:28:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:29,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:29,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:29,475 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:29,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 00:28:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:29,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 00:28:29,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:29,925 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 [2021-12-18 00:28:30,472 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-18 00:28:30,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 34 [2021-12-18 00:28:30,860 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-12-18 00:28:30,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 44 [2021-12-18 00:28:30,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:28:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:30,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:31,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055745652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:31,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:31,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:31,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067862050] [2021-12-18 00:28:31,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:31,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:31,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:31,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=835, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:31,156 INFO L87 Difference]: Start difference. First operand 290 states and 406 transitions. Second operand has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:31,883 INFO L93 Difference]: Finished difference Result 399 states and 564 transitions. [2021-12-18 00:28:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 00:28:31,883 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 78 [2021-12-18 00:28:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:31,885 INFO L225 Difference]: With dead ends: 399 [2021-12-18 00:28:31,885 INFO L226 Difference]: Without dead ends: 364 [2021-12-18 00:28:31,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=1618, Unknown=1, NotChecked=0, Total=1806 [2021-12-18 00:28:31,886 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 196 mSDsluCounter, 2218 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1622 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:31,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 2411 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 756 Invalid, 0 Unknown, 1622 Unchecked, 0.4s Time] [2021-12-18 00:28:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-18 00:28:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 290. [2021-12-18 00:28:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 241 states have (on average 1.4190871369294606) internal successors, (342), 247 states have internal predecessors, (342), 27 states have call successors, (27), 17 states have call predecessors, (27), 21 states have return successors, (37), 25 states have call predecessors, (37), 26 states have call successors, (37) [2021-12-18 00:28:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 406 transitions. [2021-12-18 00:28:31,899 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 406 transitions. Word has length 78 [2021-12-18 00:28:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:31,899 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 406 transitions. [2021-12-18 00:28:31,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 406 transitions. [2021-12-18 00:28:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-18 00:28:31,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:31,901 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:31,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:32,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:32,117 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:32,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1452243686, now seen corresponding path program 1 times [2021-12-18 00:28:32,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:32,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919771300] [2021-12-18 00:28:32,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:32,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:28:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:32,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919771300] [2021-12-18 00:28:32,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919771300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867049733] [2021-12-18 00:28:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:32,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:32,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:32,375 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:32,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 00:28:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:32,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 00:28:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:32,790 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 [2021-12-18 00:28:33,316 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:33,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:33,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:33,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:33,690 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:28:33,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-18 00:28:33,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:33,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:33,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867049733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:33,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:33,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:33,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227469473] [2021-12-18 00:28:33,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:33,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:33,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:33,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:33,979 INFO L87 Difference]: Start difference. First operand 290 states and 406 transitions. Second operand has 26 states, 24 states have (on average 4.375) internal successors, (105), 22 states have internal predecessors, (105), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:34,671 INFO L93 Difference]: Finished difference Result 392 states and 549 transitions. [2021-12-18 00:28:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 00:28:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.375) internal successors, (105), 22 states have internal predecessors, (105), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 79 [2021-12-18 00:28:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:34,676 INFO L225 Difference]: With dead ends: 392 [2021-12-18 00:28:34,676 INFO L226 Difference]: Without dead ends: 357 [2021-12-18 00:28:34,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=1851, Unknown=1, NotChecked=0, Total=2070 [2021-12-18 00:28:34,678 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 151 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 2029 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1582 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:34,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 2029 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 583 Invalid, 0 Unknown, 1582 Unchecked, 0.3s Time] [2021-12-18 00:28:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-18 00:28:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 290. [2021-12-18 00:28:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 241 states have (on average 1.4190871369294606) internal successors, (342), 247 states have internal predecessors, (342), 27 states have call successors, (27), 17 states have call predecessors, (27), 21 states have return successors, (37), 25 states have call predecessors, (37), 26 states have call successors, (37) [2021-12-18 00:28:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 406 transitions. [2021-12-18 00:28:34,693 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 406 transitions. Word has length 79 [2021-12-18 00:28:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:34,693 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 406 transitions. [2021-12-18 00:28:34,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.375) internal successors, (105), 22 states have internal predecessors, (105), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 406 transitions. [2021-12-18 00:28:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-18 00:28:34,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:34,695 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:28:34,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:34,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-18 00:28:34,911 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash -297516900, now seen corresponding path program 2 times [2021-12-18 00:28:34,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:34,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374799591] [2021-12-18 00:28:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:34,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:35,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:35,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:35,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:35,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:28:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:35,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:28:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:35,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:28:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:35,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:28:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:35,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-18 00:28:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 00:28:35,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374799591] [2021-12-18 00:28:35,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374799591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:35,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823362287] [2021-12-18 00:28:35,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:28:35,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:35,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:35,116 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:35,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 00:28:36,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:28:36,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:28:36,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 00:28:36,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 00:28:36,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:36,714 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-18 00:28:36,714 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 20 treesize of output 19 [2021-12-18 00:28:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 00:28:36,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823362287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:28:36,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:28:36,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 26 [2021-12-18 00:28:36,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139371647] [2021-12-18 00:28:36,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:36,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:36,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:36,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-12-18 00:28:36,740 INFO L87 Difference]: Start difference. First operand 290 states and 406 transitions. Second operand has 26 states, 23 states have (on average 5.130434782608695) internal successors, (118), 22 states have internal predecessors, (118), 9 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 6 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-18 00:28:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:37,980 INFO L93 Difference]: Finished difference Result 500 states and 708 transitions. [2021-12-18 00:28:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 00:28:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.130434782608695) internal successors, (118), 22 states have internal predecessors, (118), 9 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 6 states have call predecessors, (21), 9 states have call successors, (21) Word has length 79 [2021-12-18 00:28:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:37,982 INFO L225 Difference]: With dead ends: 500 [2021-12-18 00:28:37,982 INFO L226 Difference]: Without dead ends: 302 [2021-12-18 00:28:37,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 00:28:37,984 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 228 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:37,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 1078 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1809 Invalid, 0 Unknown, 412 Unchecked, 0.8s Time] [2021-12-18 00:28:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-18 00:28:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 271. [2021-12-18 00:28:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 230 states have (on average 1.434782608695652) internal successors, (330), 234 states have internal predecessors, (330), 22 states have call successors, (22), 16 states have call predecessors, (22), 18 states have return successors, (28), 20 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-18 00:28:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 380 transitions. [2021-12-18 00:28:37,995 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 380 transitions. Word has length 79 [2021-12-18 00:28:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:37,995 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 380 transitions. [2021-12-18 00:28:37,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.130434782608695) internal successors, (118), 22 states have internal predecessors, (118), 9 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 6 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-18 00:28:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 380 transitions. [2021-12-18 00:28:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 00:28:37,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:37,997 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:38,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:38,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 00:28:38,212 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1547441916, now seen corresponding path program 1 times [2021-12-18 00:28:38,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:38,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101642460] [2021-12-18 00:28:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:38,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:28:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:38,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:38,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101642460] [2021-12-18 00:28:38,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101642460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459122512] [2021-12-18 00:28:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:38,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:38,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:38,419 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:38,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 00:28:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:38,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 00:28:38,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:38,884 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 [2021-12-18 00:28:39,406 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:39,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:39,822 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:28:39,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-18 00:28:39,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:39,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:40,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459122512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:40,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:40,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:40,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219284252] [2021-12-18 00:28:40,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:40,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:40,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:40,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:40,111 INFO L87 Difference]: Start difference. First operand 271 states and 380 transitions. Second operand has 26 states, 24 states have (on average 4.458333333333333) internal successors, (107), 22 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:40,796 INFO L93 Difference]: Finished difference Result 326 states and 449 transitions. [2021-12-18 00:28:40,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 00:28:40,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.458333333333333) internal successors, (107), 22 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 80 [2021-12-18 00:28:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:40,800 INFO L225 Difference]: With dead ends: 326 [2021-12-18 00:28:40,800 INFO L226 Difference]: Without dead ends: 291 [2021-12-18 00:28:40,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=233, Invalid=1928, Unknown=1, NotChecked=0, Total=2162 [2021-12-18 00:28:40,805 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 92 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:40,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1517 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 559 Invalid, 0 Unknown, 570 Unchecked, 0.3s Time] [2021-12-18 00:28:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-18 00:28:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 271. [2021-12-18 00:28:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 230 states have (on average 1.434782608695652) internal successors, (330), 234 states have internal predecessors, (330), 22 states have call successors, (22), 16 states have call predecessors, (22), 18 states have return successors, (28), 20 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-18 00:28:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 380 transitions. [2021-12-18 00:28:40,819 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 380 transitions. Word has length 80 [2021-12-18 00:28:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:40,819 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 380 transitions. [2021-12-18 00:28:40,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.458333333333333) internal successors, (107), 22 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 380 transitions. [2021-12-18 00:28:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 00:28:40,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:40,821 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:40,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:41,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:41,024 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:41,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash -236206099, now seen corresponding path program 1 times [2021-12-18 00:28:41,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:41,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962605954] [2021-12-18 00:28:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:41,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:28:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 00:28:41,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:41,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962605954] [2021-12-18 00:28:41,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962605954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:28:41,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:28:41,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 00:28:41,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429731963] [2021-12-18 00:28:41,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:28:41,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:28:41,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:41,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:28:41,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:28:41,144 INFO L87 Difference]: Start difference. First operand 271 states and 380 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:28:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:41,299 INFO L93 Difference]: Finished difference Result 368 states and 515 transitions. [2021-12-18 00:28:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 00:28:41,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2021-12-18 00:28:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:41,301 INFO L225 Difference]: With dead ends: 368 [2021-12-18 00:28:41,301 INFO L226 Difference]: Without dead ends: 297 [2021-12-18 00:28:41,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:28:41,302 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 32 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:41,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 379 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:28:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-18 00:28:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 289. [2021-12-18 00:28:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 248 states have (on average 1.403225806451613) internal successors, (348), 252 states have internal predecessors, (348), 22 states have call successors, (22), 16 states have call predecessors, (22), 18 states have return successors, (28), 20 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-18 00:28:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 398 transitions. [2021-12-18 00:28:41,314 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 398 transitions. Word has length 80 [2021-12-18 00:28:41,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:41,314 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 398 transitions. [2021-12-18 00:28:41,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:28:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 398 transitions. [2021-12-18 00:28:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 00:28:41,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:41,316 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:41,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-18 00:28:41,316 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:41,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1687021935, now seen corresponding path program 1 times [2021-12-18 00:28:41,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:41,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158528826] [2021-12-18 00:28:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:41,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:28:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:41,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158528826] [2021-12-18 00:28:41,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158528826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271367065] [2021-12-18 00:28:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:41,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:41,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:41,559 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:41,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 00:28:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:41,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-18 00:28:41,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:41,988 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 [2021-12-18 00:28:42,532 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:42,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:42,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:42,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 28 [2021-12-18 00:28:42,820 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-18 00:28:42,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-18 00:28:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:43,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:43,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271367065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:43,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:43,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2021-12-18 00:28:43,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433591907] [2021-12-18 00:28:43,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:43,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 00:28:43,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:43,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 00:28:43,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1068, Unknown=6, NotChecked=0, Total=1190 [2021-12-18 00:28:43,285 INFO L87 Difference]: Start difference. First operand 289 states and 398 transitions. Second operand has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:28:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:44,082 INFO L93 Difference]: Finished difference Result 351 states and 473 transitions. [2021-12-18 00:28:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 00:28:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 80 [2021-12-18 00:28:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:44,085 INFO L225 Difference]: With dead ends: 351 [2021-12-18 00:28:44,085 INFO L226 Difference]: Without dead ends: 316 [2021-12-18 00:28:44,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=272, Invalid=2685, Unknown=13, NotChecked=0, Total=2970 [2021-12-18 00:28:44,086 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 58 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1085 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:44,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1995 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 482 Invalid, 0 Unknown, 1085 Unchecked, 0.3s Time] [2021-12-18 00:28:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-18 00:28:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 291. [2021-12-18 00:28:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 250 states have (on average 1.408) internal successors, (352), 254 states have internal predecessors, (352), 22 states have call successors, (22), 16 states have call predecessors, (22), 18 states have return successors, (28), 20 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-18 00:28:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 402 transitions. [2021-12-18 00:28:44,104 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 402 transitions. Word has length 80 [2021-12-18 00:28:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:44,104 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 402 transitions. [2021-12-18 00:28:44,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:28:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 402 transitions. [2021-12-18 00:28:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 00:28:44,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:44,106 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:44,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:44,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:44,318 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:44,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1553008429, now seen corresponding path program 1 times [2021-12-18 00:28:44,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:44,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092860952] [2021-12-18 00:28:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:44,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:28:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:44,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:44,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092860952] [2021-12-18 00:28:44,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092860952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:44,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362715130] [2021-12-18 00:28:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:44,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:44,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:44,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 00:28:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:44,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-18 00:28:44,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:44,971 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 [2021-12-18 00:28:45,466 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:45,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:45,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:45,759 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:28:45,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2021-12-18 00:28:45,774 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:28:45,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:28:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 00:28:45,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:46,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362715130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:46,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:46,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2021-12-18 00:28:46,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147856731] [2021-12-18 00:28:46,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:46,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 00:28:46,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 00:28:46,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1074, Unknown=4, NotChecked=0, Total=1190 [2021-12-18 00:28:46,227 INFO L87 Difference]: Start difference. First operand 291 states and 402 transitions. Second operand has 30 states, 27 states have (on average 4.0) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:28:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:46,996 INFO L93 Difference]: Finished difference Result 364 states and 492 transitions. [2021-12-18 00:28:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 00:28:46,997 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 4.0) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) Word has length 80 [2021-12-18 00:28:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:46,998 INFO L225 Difference]: With dead ends: 364 [2021-12-18 00:28:46,998 INFO L226 Difference]: Without dead ends: 329 [2021-12-18 00:28:46,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=2318, Unknown=10, NotChecked=0, Total=2550 [2021-12-18 00:28:46,999 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 55 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 964 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:47,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 2012 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 739 Invalid, 0 Unknown, 964 Unchecked, 0.4s Time] [2021-12-18 00:28:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-18 00:28:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 291. [2021-12-18 00:28:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 250 states have (on average 1.408) internal successors, (352), 254 states have internal predecessors, (352), 22 states have call successors, (22), 16 states have call predecessors, (22), 18 states have return successors, (28), 20 states have call predecessors, (28), 21 states have call successors, (28) [2021-12-18 00:28:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 402 transitions. [2021-12-18 00:28:47,012 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 402 transitions. Word has length 80 [2021-12-18 00:28:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:47,012 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 402 transitions. [2021-12-18 00:28:47,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 4.0) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:28:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 402 transitions. [2021-12-18 00:28:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 00:28:47,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:47,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:47,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-18 00:28:47,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:47,223 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:47,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash 105103528, now seen corresponding path program 1 times [2021-12-18 00:28:47,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:47,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119216855] [2021-12-18 00:28:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:47,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:28:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:28:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:28:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:28:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:28:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 00:28:47,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:47,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119216855] [2021-12-18 00:28:47,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119216855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:47,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942902459] [2021-12-18 00:28:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:47,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:47,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:47,495 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:47,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 00:28:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:47,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:28:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:28:48,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:28:48,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942902459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:28:48,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:28:48,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-18 00:28:48,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838991309] [2021-12-18 00:28:48,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:28:48,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:28:48,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:28:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:28:48,041 INFO L87 Difference]: Start difference. First operand 291 states and 402 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:28:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:48,110 INFO L93 Difference]: Finished difference Result 508 states and 719 transitions. [2021-12-18 00:28:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:28:48,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 80 [2021-12-18 00:28:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:48,111 INFO L225 Difference]: With dead ends: 508 [2021-12-18 00:28:48,112 INFO L226 Difference]: Without dead ends: 305 [2021-12-18 00:28:48,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-18 00:28:48,112 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 12 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:48,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1439 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:28:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-18 00:28:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 297. [2021-12-18 00:28:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 255 states have (on average 1.4) internal successors, (357), 260 states have internal predecessors, (357), 22 states have call successors, (22), 16 states have call predecessors, (22), 19 states have return successors, (31), 20 states have call predecessors, (31), 21 states have call successors, (31) [2021-12-18 00:28:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 410 transitions. [2021-12-18 00:28:48,124 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 410 transitions. Word has length 80 [2021-12-18 00:28:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:48,124 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 410 transitions. [2021-12-18 00:28:48,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:28:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 410 transitions. [2021-12-18 00:28:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-18 00:28:48,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:48,126 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:48,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:48,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-18 00:28:48,339 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1803966603, now seen corresponding path program 1 times [2021-12-18 00:28:48,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:48,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116549762] [2021-12-18 00:28:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:48,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:28:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:48,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:48,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116549762] [2021-12-18 00:28:48,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116549762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:48,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648782710] [2021-12-18 00:28:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:48,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:48,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:48,559 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:48,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 00:28:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:48,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-18 00:28:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:48,983 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 [2021-12-18 00:28:49,509 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-18 00:28:49,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 34 [2021-12-18 00:28:49,906 INFO L354 Elim1Store]: treesize reduction 97, result has 1.0 percent of original size [2021-12-18 00:28:49,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 23 [2021-12-18 00:28:49,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:49,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:50,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648782710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:50,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:50,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:28:50,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944941083] [2021-12-18 00:28:50,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:50,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:28:50,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:28:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=835, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:28:50,182 INFO L87 Difference]: Start difference. First operand 297 states and 410 transitions. Second operand has 26 states, 24 states have (on average 4.541666666666667) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:50,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:50,880 INFO L93 Difference]: Finished difference Result 363 states and 489 transitions. [2021-12-18 00:28:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 00:28:50,881 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.541666666666667) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 81 [2021-12-18 00:28:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:50,882 INFO L225 Difference]: With dead ends: 363 [2021-12-18 00:28:50,882 INFO L226 Difference]: Without dead ends: 323 [2021-12-18 00:28:50,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=1767, Unknown=1, NotChecked=0, Total=1980 [2021-12-18 00:28:50,884 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 64 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 535 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:50,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1666 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 666 Invalid, 0 Unknown, 535 Unchecked, 0.4s Time] [2021-12-18 00:28:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-18 00:28:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 297. [2021-12-18 00:28:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 255 states have (on average 1.4) internal successors, (357), 260 states have internal predecessors, (357), 22 states have call successors, (22), 16 states have call predecessors, (22), 19 states have return successors, (31), 20 states have call predecessors, (31), 21 states have call successors, (31) [2021-12-18 00:28:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 410 transitions. [2021-12-18 00:28:50,895 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 410 transitions. Word has length 81 [2021-12-18 00:28:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:50,895 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 410 transitions. [2021-12-18 00:28:50,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.541666666666667) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:28:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 410 transitions. [2021-12-18 00:28:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-18 00:28:50,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:50,897 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:50,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:51,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-18 00:28:51,112 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:51,112 INFO L85 PathProgramCache]: Analyzing trace with hash -384834745, now seen corresponding path program 1 times [2021-12-18 00:28:51,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:51,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14054842] [2021-12-18 00:28:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:51,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:51,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:51,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:51,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:51,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:51,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:51,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:28:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:51,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:51,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14054842] [2021-12-18 00:28:51,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14054842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:28:51,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:28:51,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-18 00:28:51,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000285785] [2021-12-18 00:28:51,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:28:51,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 00:28:51,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 00:28:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:28:51,687 INFO L87 Difference]: Start difference. First operand 297 states and 410 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-18 00:28:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:52,847 INFO L93 Difference]: Finished difference Result 364 states and 498 transitions. [2021-12-18 00:28:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 00:28:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 82 [2021-12-18 00:28:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:52,849 INFO L225 Difference]: With dead ends: 364 [2021-12-18 00:28:52,849 INFO L226 Difference]: Without dead ends: 331 [2021-12-18 00:28:52,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-18 00:28:52,850 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 149 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:52,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 644 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 00:28:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-18 00:28:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 309. [2021-12-18 00:28:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 260 states have (on average 1.3923076923076922) internal successors, (362), 266 states have internal predecessors, (362), 28 states have call successors, (28), 16 states have call predecessors, (28), 20 states have return successors, (43), 26 states have call predecessors, (43), 27 states have call successors, (43) [2021-12-18 00:28:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 433 transitions. [2021-12-18 00:28:52,865 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 433 transitions. Word has length 82 [2021-12-18 00:28:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:52,865 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 433 transitions. [2021-12-18 00:28:52,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-18 00:28:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 433 transitions. [2021-12-18 00:28:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-18 00:28:52,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:52,867 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:52,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-18 00:28:52,867 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:52,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1528323135, now seen corresponding path program 1 times [2021-12-18 00:28:52,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:52,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165397838] [2021-12-18 00:28:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:52,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:52,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:52,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:52,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:52,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:53,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:53,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:53,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:53,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:28:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:53,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165397838] [2021-12-18 00:28:53,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165397838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:53,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314905759] [2021-12-18 00:28:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:53,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:53,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:53,098 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:53,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 00:28:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 00:28:53,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:53,569 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 [2021-12-18 00:28:54,100 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:28:54,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:28:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:28:54,387 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:28:54,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2021-12-18 00:28:54,429 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:28:54,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:28:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:54,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:28:54,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314905759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:54,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:28:54,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-12-18 00:28:54,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817067018] [2021-12-18 00:28:54,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:28:54,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-18 00:28:54,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:54,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-18 00:28:54,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1002, Unknown=6, NotChecked=0, Total=1122 [2021-12-18 00:28:54,896 INFO L87 Difference]: Start difference. First operand 309 states and 433 transitions. Second operand has 29 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:28:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:55,639 INFO L93 Difference]: Finished difference Result 380 states and 521 transitions. [2021-12-18 00:28:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 00:28:55,639 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 82 [2021-12-18 00:28:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:55,640 INFO L225 Difference]: With dead ends: 380 [2021-12-18 00:28:55,641 INFO L226 Difference]: Without dead ends: 340 [2021-12-18 00:28:55,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=2481, Unknown=12, NotChecked=0, Total=2756 [2021-12-18 00:28:55,642 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 84 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 758 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:55,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1884 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 467 Invalid, 0 Unknown, 758 Unchecked, 0.3s Time] [2021-12-18 00:28:55,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-18 00:28:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 309. [2021-12-18 00:28:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 260 states have (on average 1.3923076923076922) internal successors, (362), 266 states have internal predecessors, (362), 28 states have call successors, (28), 16 states have call predecessors, (28), 20 states have return successors, (43), 26 states have call predecessors, (43), 27 states have call successors, (43) [2021-12-18 00:28:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 433 transitions. [2021-12-18 00:28:55,655 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 433 transitions. Word has length 82 [2021-12-18 00:28:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:55,656 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 433 transitions. [2021-12-18 00:28:55,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:28:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 433 transitions. [2021-12-18 00:28:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-18 00:28:55,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:55,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:55,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:55,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-18 00:28:55,871 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash 400956781, now seen corresponding path program 1 times [2021-12-18 00:28:55,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:55,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63074553] [2021-12-18 00:28:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:55,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:55,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:55,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:55,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:56,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:56,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:28:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:56,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:28:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:56,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:28:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:56,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:28:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 00:28:56,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:56,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63074553] [2021-12-18 00:28:56,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63074553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054123413] [2021-12-18 00:28:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:56,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:56,106 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:56,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 00:28:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:56,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 00:28:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-18 00:28:56,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:28:56,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054123413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:28:56,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:28:56,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2021-12-18 00:28:56,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453870359] [2021-12-18 00:28:56,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:28:56,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:28:56,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:28:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:28:56,696 INFO L87 Difference]: Start difference. First operand 309 states and 433 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:28:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:56,871 INFO L93 Difference]: Finished difference Result 559 states and 799 transitions. [2021-12-18 00:28:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:28:56,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2021-12-18 00:28:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:56,872 INFO L225 Difference]: With dead ends: 559 [2021-12-18 00:28:56,872 INFO L226 Difference]: Without dead ends: 317 [2021-12-18 00:28:56,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-18 00:28:56,874 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 17 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:56,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 569 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-12-18 00:28:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-18 00:28:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 309. [2021-12-18 00:28:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 260 states have (on average 1.3846153846153846) internal successors, (360), 266 states have internal predecessors, (360), 28 states have call successors, (28), 16 states have call predecessors, (28), 20 states have return successors, (43), 26 states have call predecessors, (43), 27 states have call successors, (43) [2021-12-18 00:28:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 431 transitions. [2021-12-18 00:28:56,889 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 431 transitions. Word has length 82 [2021-12-18 00:28:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:56,889 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 431 transitions. [2021-12-18 00:28:56,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:28:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 431 transitions. [2021-12-18 00:28:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-18 00:28:56,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:56,891 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:56,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:57,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:57,105 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:57,106 INFO L85 PathProgramCache]: Analyzing trace with hash 961656559, now seen corresponding path program 1 times [2021-12-18 00:28:57,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:57,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524366175] [2021-12-18 00:28:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:57,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:28:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:28:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:28:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:28:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-18 00:28:57,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:57,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524366175] [2021-12-18 00:28:57,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524366175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:57,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469728994] [2021-12-18 00:28:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:57,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:57,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:57,359 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:57,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 00:28:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:57,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2617 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:28:57,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 00:28:57,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:28:57,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469728994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:28:57,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:28:57,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-12-18 00:28:57,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152042765] [2021-12-18 00:28:57,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:28:57,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:28:57,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:28:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:28:57,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:28:57,925 INFO L87 Difference]: Start difference. First operand 309 states and 431 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:28:57,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:28:57,989 INFO L93 Difference]: Finished difference Result 528 states and 756 transitions. [2021-12-18 00:28:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:28:57,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 82 [2021-12-18 00:28:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:28:57,991 INFO L225 Difference]: With dead ends: 528 [2021-12-18 00:28:57,991 INFO L226 Difference]: Without dead ends: 307 [2021-12-18 00:28:57,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-18 00:28:57,992 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 11 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:28:57,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1424 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:28:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-18 00:28:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 304. [2021-12-18 00:28:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 255 states have (on average 1.380392156862745) internal successors, (352), 261 states have internal predecessors, (352), 28 states have call successors, (28), 16 states have call predecessors, (28), 20 states have return successors, (41), 26 states have call predecessors, (41), 27 states have call successors, (41) [2021-12-18 00:28:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 421 transitions. [2021-12-18 00:28:58,005 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 421 transitions. Word has length 82 [2021-12-18 00:28:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:28:58,005 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 421 transitions. [2021-12-18 00:28:58,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:28:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 421 transitions. [2021-12-18 00:28:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 00:28:58,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:28:58,006 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:28:58,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 00:28:58,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 00:28:58,228 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:28:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:28:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash 149743056, now seen corresponding path program 1 times [2021-12-18 00:28:58,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:28:58,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309968192] [2021-12-18 00:28:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:58,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:28:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:28:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:28:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:28:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:28:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:28:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:28:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:28:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 00:28:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:28:58,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:28:58,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309968192] [2021-12-18 00:28:58,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309968192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:28:58,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119777723] [2021-12-18 00:28:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:28:58,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:28:58,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:28:58,453 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:28:58,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 00:28:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:28:58,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 00:28:58,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:28:58,945 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 [2021-12-18 00:28:59,472 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-18 00:28:59,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 34 [2021-12-18 00:28:59,915 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-12-18 00:28:59,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 44 [2021-12-18 00:28:59,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:28:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:28:59,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:29:00,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119777723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:29:00,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:29:00,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-18 00:29:00,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279888368] [2021-12-18 00:29:00,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:29:00,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:29:00,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:29:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:29:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=835, Unknown=1, NotChecked=0, Total=930 [2021-12-18 00:29:00,241 INFO L87 Difference]: Start difference. First operand 304 states and 421 transitions. Second operand has 26 states, 24 states have (on average 4.708333333333333) internal successors, (113), 22 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:29:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:29:00,954 INFO L93 Difference]: Finished difference Result 422 states and 580 transitions. [2021-12-18 00:29:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 00:29:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.708333333333333) internal successors, (113), 22 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 83 [2021-12-18 00:29:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:29:00,956 INFO L225 Difference]: With dead ends: 422 [2021-12-18 00:29:00,956 INFO L226 Difference]: Without dead ends: 382 [2021-12-18 00:29:00,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=1765, Unknown=1, NotChecked=0, Total=1980 [2021-12-18 00:29:00,957 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 235 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1235 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:29:00,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1856 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 603 Invalid, 0 Unknown, 1235 Unchecked, 0.4s Time] [2021-12-18 00:29:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-18 00:29:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 304. [2021-12-18 00:29:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 255 states have (on average 1.380392156862745) internal successors, (352), 261 states have internal predecessors, (352), 28 states have call successors, (28), 16 states have call predecessors, (28), 20 states have return successors, (41), 26 states have call predecessors, (41), 27 states have call successors, (41) [2021-12-18 00:29:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 421 transitions. [2021-12-18 00:29:00,982 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 421 transitions. Word has length 83 [2021-12-18 00:29:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:29:00,982 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 421 transitions. [2021-12-18 00:29:00,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.708333333333333) internal successors, (113), 22 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:29:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 421 transitions. [2021-12-18 00:29:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 00:29:00,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:29:00,983 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:29:01,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 00:29:01,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 00:29:01,204 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:29:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:29:01,205 INFO L85 PathProgramCache]: Analyzing trace with hash -853396441, now seen corresponding path program 1 times [2021-12-18 00:29:01,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:29:01,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509023635] [2021-12-18 00:29:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:29:01,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:29:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:29:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:29:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:29:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:29:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:29:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:29:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:29:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 00:29:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:29:01,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:29:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509023635] [2021-12-18 00:29:01,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509023635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:29:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920563874] [2021-12-18 00:29:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:29:01,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:29:01,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:29:01,436 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:29:01,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 00:29:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 00:29:01,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:29:01,901 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 [2021-12-18 00:29:02,461 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:29:02,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:29:02,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:29:02,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:29:02,788 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:29:02,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2021-12-18 00:29:02,801 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:29:02,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:29:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:29:03,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:29:03,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920563874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:29:03,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:29:03,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2021-12-18 00:29:03,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117773750] [2021-12-18 00:29:03,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:29:03,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 00:29:03,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:29:03,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 00:29:03,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1070, Unknown=5, NotChecked=0, Total=1190 [2021-12-18 00:29:03,276 INFO L87 Difference]: Start difference. First operand 304 states and 421 transitions. Second operand has 30 states, 28 states have (on average 4.071428571428571) internal successors, (114), 25 states have internal predecessors, (114), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:29:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:29:04,005 INFO L93 Difference]: Finished difference Result 363 states and 493 transitions. [2021-12-18 00:29:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 00:29:04,005 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.071428571428571) internal successors, (114), 25 states have internal predecessors, (114), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 83 [2021-12-18 00:29:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:29:04,006 INFO L225 Difference]: With dead ends: 363 [2021-12-18 00:29:04,007 INFO L226 Difference]: Without dead ends: 323 [2021-12-18 00:29:04,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=2497, Unknown=11, NotChecked=0, Total=2756 [2021-12-18 00:29:04,008 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 89 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 719 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:29:04,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1711 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 538 Invalid, 0 Unknown, 719 Unchecked, 0.3s Time] [2021-12-18 00:29:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-18 00:29:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 302. [2021-12-18 00:29:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 253 states have (on average 1.383399209486166) internal successors, (350), 259 states have internal predecessors, (350), 28 states have call successors, (28), 16 states have call predecessors, (28), 20 states have return successors, (41), 26 states have call predecessors, (41), 27 states have call successors, (41) [2021-12-18 00:29:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 419 transitions. [2021-12-18 00:29:04,023 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 419 transitions. Word has length 83 [2021-12-18 00:29:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:29:04,023 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 419 transitions. [2021-12-18 00:29:04,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.071428571428571) internal successors, (114), 25 states have internal predecessors, (114), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-18 00:29:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 419 transitions. [2021-12-18 00:29:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 00:29:04,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:29:04,025 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:29:04,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 00:29:04,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:29:04,235 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:29:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:29:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash -987409947, now seen corresponding path program 1 times [2021-12-18 00:29:04,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:29:04,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364637556] [2021-12-18 00:29:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:29:04,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:29:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:29:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:29:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:29:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:29:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:29:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:29:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:29:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-18 00:29:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:29:04,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:29:04,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364637556] [2021-12-18 00:29:04,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364637556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:29:04,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387609908] [2021-12-18 00:29:04,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:29:04,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:29:04,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:29:04,454 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:29:04,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 00:29:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:04,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 00:29:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:29:04,933 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 [2021-12-18 00:29:05,462 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:29:05,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:29:05,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:29:05,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:29:05,895 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:29:05,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-18 00:29:05,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-18 00:29:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:29:05,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:29:06,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387609908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:29:06,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:29:06,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2021-12-18 00:29:06,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659933054] [2021-12-18 00:29:06,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:29:06,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 00:29:06,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:29:06,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 00:29:06,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=950, Unknown=1, NotChecked=0, Total=1056 [2021-12-18 00:29:06,167 INFO L87 Difference]: Start difference. First operand 302 states and 419 transitions. Second operand has 28 states, 26 states have (on average 4.346153846153846) internal successors, (113), 24 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:29:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:29:07,050 INFO L93 Difference]: Finished difference Result 360 states and 489 transitions. [2021-12-18 00:29:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 00:29:07,051 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 4.346153846153846) internal successors, (113), 24 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 83 [2021-12-18 00:29:07,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:29:07,052 INFO L225 Difference]: With dead ends: 360 [2021-12-18 00:29:07,052 INFO L226 Difference]: Without dead ends: 320 [2021-12-18 00:29:07,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=2110, Unknown=1, NotChecked=0, Total=2352 [2021-12-18 00:29:07,053 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 60 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1080 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:29:07,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 2177 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 993 Invalid, 0 Unknown, 1080 Unchecked, 0.5s Time] [2021-12-18 00:29:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-18 00:29:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 302. [2021-12-18 00:29:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 253 states have (on average 1.383399209486166) internal successors, (350), 259 states have internal predecessors, (350), 28 states have call successors, (28), 16 states have call predecessors, (28), 20 states have return successors, (41), 26 states have call predecessors, (41), 27 states have call successors, (41) [2021-12-18 00:29:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 419 transitions. [2021-12-18 00:29:07,084 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 419 transitions. Word has length 83 [2021-12-18 00:29:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:29:07,084 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 419 transitions. [2021-12-18 00:29:07,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 4.346153846153846) internal successors, (113), 24 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:29:07,084 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 419 transitions. [2021-12-18 00:29:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-18 00:29:07,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:29:07,086 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:29:07,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 00:29:07,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:29:07,306 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:29:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:29:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1019997721, now seen corresponding path program 1 times [2021-12-18 00:29:07,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:29:07,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192533698] [2021-12-18 00:29:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:29:07,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:29:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:07,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-18 00:29:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-18 00:29:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:07,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:29:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:07,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-18 00:29:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:07,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:29:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:07,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:29:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:07,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:29:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:07,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-18 00:29:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 00:29:07,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:29:07,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192533698] [2021-12-18 00:29:07,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192533698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:29:07,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714857914] [2021-12-18 00:29:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:29:07,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:29:07,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:29:07,993 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:29:07,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 00:29:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:08,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 00:29:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:29:08,451 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 [2021-12-18 00:29:09,044 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-18 00:29:09,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-18 00:29:09,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:29:09,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:29:09,404 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-18 00:29:09,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 82 [2021-12-18 00:29:09,421 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-18 00:29:09,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 00:29:09,427 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 8 treesize of output 7 [2021-12-18 00:29:09,445 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 12 treesize of output 11 [2021-12-18 00:29:09,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-12-18 00:29:09,596 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-18 00:29:09,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:29:09,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-12-18 00:29:09,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527020804] [2021-12-18 00:29:09,596 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 00:29:09,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 00:29:09,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:29:09,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 00:29:09,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=877, Unknown=9, NotChecked=0, Total=992 [2021-12-18 00:29:09,597 INFO L87 Difference]: Start difference. First operand 302 states and 419 transitions. Second operand has 22 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 8 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-18 00:29:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 00:29:09,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=877, Unknown=9, NotChecked=0, Total=992 [2021-12-18 00:29:09,600 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:29:09,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:29:09,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 00:29:09,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:29:09,816 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@115c568d at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-18 00:29:09,819 INFO L158 Benchmark]: Toolchain (without parser) took 79771.48ms. Allocated memory was 107.0MB in the beginning and 511.7MB in the end (delta: 404.8MB). Free memory was 60.2MB in the beginning and 318.5MB in the end (delta: -258.2MB). Peak memory consumption was 144.9MB. Max. memory is 16.1GB. [2021-12-18 00:29:09,819 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory was 77.6MB in the beginning and 77.6MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 00:29:09,820 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2235.61ms. Allocated memory was 107.0MB in the beginning and 148.9MB in the end (delta: 41.9MB). Free memory was 60.1MB in the beginning and 52.0MB in the end (delta: 8.1MB). Peak memory consumption was 85.5MB. Max. memory is 16.1GB. [2021-12-18 00:29:09,820 INFO L158 Benchmark]: Boogie Procedure Inliner took 148.80ms. Allocated memory was 148.9MB in the beginning and 228.6MB in the end (delta: 79.7MB). Free memory was 52.0MB in the beginning and 159.8MB in the end (delta: -107.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 00:29:09,820 INFO L158 Benchmark]: Boogie Preprocessor took 99.88ms. Allocated memory is still 228.6MB. Free memory was 159.8MB in the beginning and 151.4MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 00:29:09,820 INFO L158 Benchmark]: RCFGBuilder took 821.62ms. Allocated memory is still 228.6MB. Free memory was 151.4MB in the beginning and 156.7MB in the end (delta: -5.3MB). Peak memory consumption was 75.5MB. Max. memory is 16.1GB. [2021-12-18 00:29:09,820 INFO L158 Benchmark]: TraceAbstraction took 76461.42ms. Allocated memory was 228.6MB in the beginning and 511.7MB in the end (delta: 283.1MB). Free memory was 155.7MB in the beginning and 318.5MB in the end (delta: -162.8MB). Peak memory consumption was 119.3MB. Max. memory is 16.1GB. [2021-12-18 00:29:09,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory was 77.6MB in the beginning and 77.6MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2235.61ms. Allocated memory was 107.0MB in the beginning and 148.9MB in the end (delta: 41.9MB). Free memory was 60.1MB in the beginning and 52.0MB in the end (delta: 8.1MB). Peak memory consumption was 85.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 148.80ms. Allocated memory was 148.9MB in the beginning and 228.6MB in the end (delta: 79.7MB). Free memory was 52.0MB in the beginning and 159.8MB in the end (delta: -107.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 99.88ms. Allocated memory is still 228.6MB. Free memory was 159.8MB in the beginning and 151.4MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 821.62ms. Allocated memory is still 228.6MB. Free memory was 151.4MB in the beginning and 156.7MB in the end (delta: -5.3MB). Peak memory consumption was 75.5MB. Max. memory is 16.1GB. * TraceAbstraction took 76461.42ms. Allocated memory was 228.6MB in the beginning and 511.7MB in the end (delta: 283.1MB). Free memory was 155.7MB in the beginning and 318.5MB in the end (delta: -162.8MB). Peak memory consumption was 119.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@115c568d de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@115c568d: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-18 00:29:09,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:29:11,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:29:11,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:29:11,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:29:11,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:29:11,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:29:11,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:29:11,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:29:11,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:29:11,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:29:11,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:29:11,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:29:11,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:29:11,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:29:11,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:29:11,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:29:11,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:29:11,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:29:11,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:29:11,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:29:11,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:29:11,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:29:11,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:29:11,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:29:11,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:29:11,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:29:11,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:29:11,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:29:11,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:29:11,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:29:11,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:29:11,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:29:11,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:29:11,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:29:11,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:29:11,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:29:11,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:29:11,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:29:11,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:29:11,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:29:11,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:29:11,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-12-18 00:29:11,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:29:11,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:29:11,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:29:11,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:29:11,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:29:11,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:29:11,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:29:11,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:29:11,565 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:29:11,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:29:11,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:29:11,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:29:11,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:29:11,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:29:11,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 00:29:11,567 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 00:29:11,567 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 00:29:11,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:29:11,568 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:29:11,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:29:11,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:29:11,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:29:11,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:29:11,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:29:11,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:29:11,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:29:11,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:29:11,569 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 00:29:11,569 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 00:29:11,569 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:29:11,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:29:11,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:29:11,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:29:11,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 00:29:11,570 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 [2021-12-18 00:29:11,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:29:11,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:29:11,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:29:11,854 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:29:11,855 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:29:11,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-18 00:29:11,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d4ee77ce/1b0cdd9ef7544df8ab39c3a5ee9fbb24/FLAG48a8297c5 [2021-12-18 00:29:12,464 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:29:12,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-18 00:29:12,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d4ee77ce/1b0cdd9ef7544df8ab39c3a5ee9fbb24/FLAG48a8297c5 [2021-12-18 00:29:12,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d4ee77ce/1b0cdd9ef7544df8ab39c3a5ee9fbb24 [2021-12-18 00:29:12,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:29:12,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:29:12,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:29:12,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:29:12,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:29:12,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:29:12" (1/1) ... [2021-12-18 00:29:12,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bce66f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:12, skipping insertion in model container [2021-12-18 00:29:12,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:29:12" (1/1) ... [2021-12-18 00:29:12,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:29:12,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:29:12,956 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_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-18 00:29:12,962 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_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-18 00:29:13,591 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:13,592 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:13,592 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:13,593 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:13,593 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:13,601 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:13,602 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:13,603 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:13,603 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:13,884 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:29:13,885 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:29:13,887 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:29:13,889 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:29:13,893 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:29:13,896 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:29:13,896 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:29:13,897 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:29:13,905 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:29:13,907 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:29:14,026 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:29:14,087 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,087 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,309 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,310 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,335 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,336 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,342 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,342 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,366 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,368 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,369 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,369 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,369 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,370 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,370 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:29:14,447 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-18 00:29:14,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:29:14,498 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_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-18 00:29:14,499 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_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-18 00:29:14,526 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,528 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,532 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,532 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,533 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,533 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,585 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:29:14,586 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:29:14,587 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:29:14,587 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:29:14,588 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:29:14,588 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:29:14,588 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:29:14,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:29:14,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:29:14,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:29:14,600 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:29:14,632 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,634 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,733 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,733 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,737 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,738 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,739 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,739 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,743 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,744 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,744 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,745 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,745 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,745 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,746 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:29:14,792 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:29:14,808 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_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-18 00:29:14,808 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_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-18 00:29:14,823 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,823 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,823 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,824 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,824 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,827 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,827 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,827 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,828 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,841 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:29:14,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:29:14,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:29:14,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:29:14,843 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:29:14,843 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:29:14,843 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:29:14,844 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:29:14,844 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:29:14,844 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:29:14,853 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:29:14,901 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,901 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,964 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,965 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,969 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,969 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,971 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,971 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,978 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,979 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,979 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,980 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,980 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,981 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,981 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:29:14,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:29:15,168 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:29:15,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15 WrapperNode [2021-12-18 00:29:15,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:29:15,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:29:15,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:29:15,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:29:15,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,374 INFO L137 Inliner]: procedures = 796, calls = 3576, calls flagged for inlining = 79, calls inlined = 6, statements flattened = 788 [2021-12-18 00:29:15,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:29:15,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:29:15,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:29:15,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:29:15,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:29:15,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:29:15,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:29:15,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:29:15,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (1/1) ... [2021-12-18 00:29:15,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:29:15,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:29:15,502 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) [2021-12-18 00:29:15,520 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 [2021-12-18 00:29:15,532 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-18 00:29:15,532 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-18 00:29:15,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:29:15,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:29:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 00:29:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:29:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:29:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:29:15,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:29:15,536 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-18 00:29:15,536 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-18 00:29:15,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:29:15,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:29:15,541 INFO L130 BoogieDeclarations]: Found specification of procedure hashlittle2 [2021-12-18 00:29:15,541 INFO L138 BoogieDeclarations]: Found implementation of procedure hashlittle2 [2021-12-18 00:29:15,541 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-18 00:29:15,541 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-18 00:29:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:29:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 00:29:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-18 00:29:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-18 00:29:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-18 00:29:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-18 00:29:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-18 00:29:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:29:15,542 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:29:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-18 00:29:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:29:15,791 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:29:15,792 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:29:18,934 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2021-12-18 00:29:18,943 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:29:18,948 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:29:18,948 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-18 00:29:18,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:29:18 BoogieIcfgContainer [2021-12-18 00:29:18,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:29:18,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:29:18,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:29:18,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:29:18,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:29:12" (1/3) ... [2021-12-18 00:29:18,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef55318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:29:18, skipping insertion in model container [2021-12-18 00:29:18,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:29:15" (2/3) ... [2021-12-18 00:29:18,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef55318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:29:18, skipping insertion in model container [2021-12-18 00:29:18,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:29:18" (3/3) ... [2021-12-18 00:29:18,955 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_byte_cursor_ptr_harness.i [2021-12-18 00:29:18,958 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:29:18,958 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:29:18,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:29:18,990 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 [2021-12-18 00:29:18,990 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:29:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 00:29:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 00:29:19,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:29:19,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:29:19,008 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:29:19,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:29:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1196197405, now seen corresponding path program 1 times [2021-12-18 00:29:19,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:29:19,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437049517] [2021-12-18 00:29:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:29:19,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:29:19,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:29:19,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:29:19,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 00:29:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:19,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-18 00:29:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:29:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 00:29:19,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:29:19,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:29:19,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437049517] [2021-12-18 00:29:19,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437049517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:29:19,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:29:19,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 00:29:19,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002028749] [2021-12-18 00:29:19,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:29:19,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 00:29:19,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:29:19,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 00:29:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 00:29:19,841 INFO L87 Difference]: Start difference. First operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:29:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:29:19,884 INFO L93 Difference]: Finished difference Result 263 states and 398 transitions. [2021-12-18 00:29:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 00:29:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-18 00:29:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:29:19,894 INFO L225 Difference]: With dead ends: 263 [2021-12-18 00:29:19,894 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 00:29:19,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 00:29:19,903 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:29:19,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:29:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 00:29:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-18 00:29:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 109 states have internal predecessors, (161), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-18 00:29:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2021-12-18 00:29:19,949 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 62 [2021-12-18 00:29:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:29:19,949 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2021-12-18 00:29:19,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:29:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2021-12-18 00:29:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 00:29:19,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:29:19,957 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:29:19,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-18 00:29:20,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:29:20,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:29:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:29:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash -902599839, now seen corresponding path program 1 times [2021-12-18 00:29:20,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:29:20,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722061647] [2021-12-18 00:29:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:29:20,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:29:20,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:29:20,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:29:20,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 00:29:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:20,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 00:29:20,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:29:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 00:29:20,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:29:20,988 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:29:20,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722061647] [2021-12-18 00:29:20,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722061647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:29:20,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:29:20,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 00:29:20,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142468022] [2021-12-18 00:29:20,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:29:20,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:29:20,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:29:20,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:29:20,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:29:20,991 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:29:21,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:29:21,041 INFO L93 Difference]: Finished difference Result 239 states and 354 transitions. [2021-12-18 00:29:21,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:29:21,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-18 00:29:21,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:29:21,044 INFO L225 Difference]: With dead ends: 239 [2021-12-18 00:29:21,044 INFO L226 Difference]: Without dead ends: 131 [2021-12-18 00:29:21,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:29:21,045 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 22 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:29:21,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 513 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:29:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-18 00:29:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-18 00:29:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-18 00:29:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2021-12-18 00:29:21,054 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 62 [2021-12-18 00:29:21,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:29:21,054 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2021-12-18 00:29:21,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-18 00:29:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2021-12-18 00:29:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 00:29:21,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:29:21,056 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:29:21,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 00:29:21,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:29:21,277 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:29:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:29:21,278 INFO L85 PathProgramCache]: Analyzing trace with hash 90546502, now seen corresponding path program 1 times [2021-12-18 00:29:21,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:29:21,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777105789] [2021-12-18 00:29:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:29:21,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:29:21,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:29:21,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:29:21,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 00:29:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:29:21,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 00:29:21,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:29:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 00:29:22,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:29:22,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:29:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777105789] [2021-12-18 00:29:22,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777105789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:29:22,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:29:22,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 00:29:22,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197630545] [2021-12-18 00:29:22,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:29:22,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 00:29:22,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:29:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 00:29:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:29:22,103 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:29:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:29:22,189 INFO L93 Difference]: Finished difference Result 239 states and 350 transitions. [2021-12-18 00:29:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 00:29:22,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-12-18 00:29:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:29:22,191 INFO L225 Difference]: With dead ends: 239 [2021-12-18 00:29:22,191 INFO L226 Difference]: Without dead ends: 131 [2021-12-18 00:29:22,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:29:22,192 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 26 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:29:22,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 685 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:29:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-18 00:29:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-18 00:29:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-18 00:29:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2021-12-18 00:29:22,197 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 64 [2021-12-18 00:29:22,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:29:22,198 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2021-12-18 00:29:22,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:29:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2021-12-18 00:29:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 00:29:22,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:29:22,199 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:29:22,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 00:29:22,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:29:22,407 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:29:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:29:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash -249804501, now seen corresponding path program 2 times [2021-12-18 00:29:22,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:29:22,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662538106] [2021-12-18 00:29:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:29:22,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:29:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:29:22,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:29:22,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 00:31:11,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:31:11,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:31:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 00:31:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:31:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:31:12,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:31:12,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:31:12,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662538106] [2021-12-18 00:31:12,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662538106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:31:12,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:31:12,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 00:31:12,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578041335] [2021-12-18 00:31:12,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:31:12,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 00:31:12,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:31:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 00:31:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 00:31:12,379 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:31:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:31:12,488 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2021-12-18 00:31:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 00:31:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 66 [2021-12-18 00:31:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:31:12,490 INFO L225 Difference]: With dead ends: 158 [2021-12-18 00:31:12,490 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 00:31:12,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-18 00:31:12,491 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 28 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:31:12,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1026 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:31:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 00:31:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-18 00:31:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 109 states have internal predecessors, (160), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-18 00:31:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2021-12-18 00:31:12,503 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 66 [2021-12-18 00:31:12,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:31:12,507 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2021-12-18 00:31:12,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-18 00:31:12,508 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2021-12-18 00:31:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 00:31:12,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:31:12,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:31:12,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-18 00:31:12,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:31:12,711 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:31:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:31:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1967970000, now seen corresponding path program 1 times [2021-12-18 00:31:12,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:31:12,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747651202] [2021-12-18 00:31:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:31:12,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:31:12,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:31:12,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:31:12,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 00:31:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:31:13,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 00:31:13,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:31:15,204 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-18 00:31:15,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 127 treesize of output 35 [2021-12-18 00:31:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:31:15,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:31:18,426 INFO L354 Elim1Store]: treesize reduction 1502, result has 4.5 percent of original size [2021-12-18 00:31:18,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 129 treesize of output 107 [2021-12-18 00:31:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:31:19,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:31:19,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747651202] [2021-12-18 00:31:19,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747651202] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:31:19,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:31:19,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-12-18 00:31:19,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933032804] [2021-12-18 00:31:19,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:31:19,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 00:31:19,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:31:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 00:31:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-18 00:31:19,184 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand has 20 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 00:31:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:31:33,105 INFO L93 Difference]: Finished difference Result 325 states and 486 transitions. [2021-12-18 00:31:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 00:31:33,106 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 68 [2021-12-18 00:31:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:31:33,107 INFO L225 Difference]: With dead ends: 325 [2021-12-18 00:31:33,107 INFO L226 Difference]: Without dead ends: 220 [2021-12-18 00:31:33,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-12-18 00:31:33,108 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 280 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:31:33,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1406 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1163 Invalid, 0 Unknown, 161 Unchecked, 12.5s Time] [2021-12-18 00:31:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-18 00:31:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 152. [2021-12-18 00:31:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 125 states have (on average 1.432) internal successors, (179), 127 states have internal predecessors, (179), 17 states have call successors, (17), 8 states have call predecessors, (17), 9 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2021-12-18 00:31:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 217 transitions. [2021-12-18 00:31:33,121 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 217 transitions. Word has length 68 [2021-12-18 00:31:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:31:33,122 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 217 transitions. [2021-12-18 00:31:33,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 00:31:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 217 transitions. [2021-12-18 00:31:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-18 00:31:33,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:31:33,123 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:31:33,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 00:31:33,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:31:33,333 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:31:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:31:33,334 INFO L85 PathProgramCache]: Analyzing trace with hash -525780671, now seen corresponding path program 1 times [2021-12-18 00:31:33,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:31:33,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99321012] [2021-12-18 00:31:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:31:33,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:31:33,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:31:33,336 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:31:33,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 00:31:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:31:34,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 00:31:34,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:31:35,768 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-18 00:31:35,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 127 treesize of output 35 [2021-12-18 00:31:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:31:36,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:31:40,184 INFO L354 Elim1Store]: treesize reduction 1502, result has 4.5 percent of original size [2021-12-18 00:31:40,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 194 treesize of output 126 [2021-12-18 00:31:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:31:40,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:31:40,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99321012] [2021-12-18 00:31:40,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99321012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:31:40,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:31:40,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-12-18 00:31:40,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067788664] [2021-12-18 00:31:40,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:31:40,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 00:31:40,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:31:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 00:31:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-12-18 00:31:40,971 INFO L87 Difference]: Start difference. First operand 152 states and 217 transitions. Second operand has 22 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 00:31:44,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 00:31:46,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 00:31:50,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:31:50,921 INFO L93 Difference]: Finished difference Result 259 states and 375 transitions. [2021-12-18 00:31:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 00:31:50,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 69 [2021-12-18 00:31:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:31:50,927 INFO L225 Difference]: With dead ends: 259 [2021-12-18 00:31:50,927 INFO L226 Difference]: Without dead ends: 229 [2021-12-18 00:31:50,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 00:31:50,928 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 164 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-18 00:31:50,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1563 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 815 Invalid, 0 Unknown, 160 Unchecked, 7.9s Time] [2021-12-18 00:31:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-18 00:31:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 164. [2021-12-18 00:31:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 133 states have (on average 1.413533834586466) internal successors, (188), 136 states have internal predecessors, (188), 19 states have call successors, (19), 9 states have call predecessors, (19), 11 states have return successors, (25), 18 states have call predecessors, (25), 18 states have call successors, (25) [2021-12-18 00:31:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 232 transitions. [2021-12-18 00:31:50,940 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 232 transitions. Word has length 69 [2021-12-18 00:31:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:31:50,941 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 232 transitions. [2021-12-18 00:31:50,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 00:31:50,941 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 232 transitions. [2021-12-18 00:31:50,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-18 00:31:50,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:31:50,942 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 00:31:50,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 00:31:51,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:31:51,159 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:31:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:31:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1327314263, now seen corresponding path program 1 times [2021-12-18 00:31:51,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:31:51,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022298098] [2021-12-18 00:31:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:31:51,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:31:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:31:51,163 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:31:51,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 00:31:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:31:52,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 00:31:52,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:31:53,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:31:53,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 35 [2021-12-18 00:31:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:31:53,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:31:54,236 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-18 00:31:54,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 129 treesize of output 1 [2021-12-18 00:32:01,732 WARN L227 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 524 DAG size of output: 270 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-18 00:32:01,735 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-12-18 00:32:01,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 129 treesize of output 772 [2021-12-18 00:40:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:40:10,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:40:10,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022298098] [2021-12-18 00:40:10,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022298098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:40:10,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:40:10,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-12-18 00:40:10,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931557129] [2021-12-18 00:40:10,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:40:10,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 00:40:10,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:40:10,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 00:40:10,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-18 00:40:10,223 INFO L87 Difference]: Start difference. First operand 164 states and 232 transitions. Second operand has 18 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 9 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:40:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:40:31,134 INFO L93 Difference]: Finished difference Result 271 states and 390 transitions. [2021-12-18 00:40:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 00:40:31,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 9 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 69 [2021-12-18 00:40:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:40:31,137 INFO L225 Difference]: With dead ends: 271 [2021-12-18 00:40:31,138 INFO L226 Difference]: Without dead ends: 241 [2021-12-18 00:40:31,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-12-18 00:40:31,139 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 365 mSDsluCounter, 2111 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:40:31,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 2360 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1552 Invalid, 0 Unknown, 196 Unchecked, 19.0s Time] [2021-12-18 00:40:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-18 00:40:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 227. [2021-12-18 00:40:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 195 states have (on average 1.4820512820512821) internal successors, (289), 199 states have internal predecessors, (289), 19 states have call successors, (19), 9 states have call predecessors, (19), 12 states have return successors, (25), 18 states have call predecessors, (25), 18 states have call successors, (25) [2021-12-18 00:40:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 333 transitions. [2021-12-18 00:40:31,148 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 333 transitions. Word has length 69 [2021-12-18 00:40:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:40:31,148 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 333 transitions. [2021-12-18 00:40:31,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 9 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-18 00:40:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 333 transitions. [2021-12-18 00:40:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 00:40:31,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:40:31,150 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-12-18 00:40:31,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 00:40:31,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:40:31,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:40:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:40:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1213034613, now seen corresponding path program 1 times [2021-12-18 00:40:31,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:40:31,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939222140] [2021-12-18 00:40:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:40:31,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:40:31,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:40:31,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:40:31,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 00:40:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:40:32,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 00:40:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:40:33,590 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-18 00:40:33,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 127 treesize of output 35 [2021-12-18 00:40:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:40:34,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:40:38,297 INFO L354 Elim1Store]: treesize reduction 1502, result has 4.5 percent of original size [2021-12-18 00:40:38,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 258 treesize of output 144 [2021-12-18 00:40:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:40:39,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:40:39,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939222140] [2021-12-18 00:40:39,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939222140] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:40:39,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:40:39,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-12-18 00:40:39,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225065574] [2021-12-18 00:40:39,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:40:39,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 00:40:39,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:40:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 00:40:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-12-18 00:40:39,048 INFO L87 Difference]: Start difference. First operand 227 states and 333 transitions. Second operand has 24 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 00:40:43,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 00:40:44,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 00:40:54,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:40:54,002 INFO L93 Difference]: Finished difference Result 268 states and 382 transitions. [2021-12-18 00:40:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 00:40:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 70 [2021-12-18 00:40:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:40:54,004 INFO L225 Difference]: With dead ends: 268 [2021-12-18 00:40:54,004 INFO L226 Difference]: Without dead ends: 238 [2021-12-18 00:40:54,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 00:40:54,005 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 171 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:40:54,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1630 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1324 Invalid, 0 Unknown, 164 Unchecked, 13.4s Time] [2021-12-18 00:40:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-18 00:40:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 221. [2021-12-18 00:40:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 191 states have (on average 1.4921465968586387) internal successors, (285), 194 states have internal predecessors, (285), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 17 states have call predecessors, (22), 17 states have call successors, (22) [2021-12-18 00:40:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2021-12-18 00:40:54,014 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 70 [2021-12-18 00:40:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:40:54,014 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2021-12-18 00:40:54,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 00:40:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2021-12-18 00:40:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 00:40:54,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:40:54,016 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-12-18 00:40:54,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-18 00:40:54,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:40:54,231 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:40:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:40:54,232 INFO L85 PathProgramCache]: Analyzing trace with hash 566238321, now seen corresponding path program 1 times [2021-12-18 00:40:54,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:40:54,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112373340] [2021-12-18 00:40:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:40:54,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:40:54,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:40:54,234 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:40:54,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 00:40:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:40:55,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 00:40:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:40:56,536 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-18 00:40:56,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 127 treesize of output 35 [2021-12-18 00:40:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:40:56,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:41:00,074 INFO L354 Elim1Store]: treesize reduction 1502, result has 4.5 percent of original size [2021-12-18 00:41:00,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 129 treesize of output 107 [2021-12-18 00:41:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:41:00,800 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:41:00,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112373340] [2021-12-18 00:41:00,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112373340] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:41:00,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:41:00,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-12-18 00:41:00,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878967328] [2021-12-18 00:41:00,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:41:00,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 00:41:00,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:41:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 00:41:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-18 00:41:00,801 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 20 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 00:41:06,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 00:41:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:41:14,914 INFO L93 Difference]: Finished difference Result 275 states and 388 transitions. [2021-12-18 00:41:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 00:41:14,915 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 70 [2021-12-18 00:41:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:41:14,917 INFO L225 Difference]: With dead ends: 275 [2021-12-18 00:41:14,917 INFO L226 Difference]: Without dead ends: 245 [2021-12-18 00:41:14,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-12-18 00:41:14,918 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 270 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-12-18 00:41:14,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 1477 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1059 Invalid, 0 Unknown, 247 Unchecked, 12.2s Time] [2021-12-18 00:41:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-18 00:41:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 221. [2021-12-18 00:41:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 191 states have (on average 1.4921465968586387) internal successors, (285), 194 states have internal predecessors, (285), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 17 states have call predecessors, (22), 17 states have call successors, (22) [2021-12-18 00:41:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2021-12-18 00:41:14,930 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 70 [2021-12-18 00:41:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:41:14,930 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2021-12-18 00:41:14,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 00:41:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2021-12-18 00:41:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-18 00:41:14,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:41:14,931 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-18 00:41:14,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 00:41:15,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 00:41:15,144 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:41:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:41:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1733464804, now seen corresponding path program 1 times [2021-12-18 00:41:15,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 00:41:15,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361279202] [2021-12-18 00:41:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:41:15,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 00:41:15,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 00:41:15,146 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 00:41:15,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 00:41:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:41:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 00:41:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:41:17,414 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-18 00:41:17,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 127 treesize of output 35 [2021-12-18 00:41:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 00:41:18,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:41:22,919 INFO L354 Elim1Store]: treesize reduction 1502, result has 4.5 percent of original size [2021-12-18 00:41:22,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 322 treesize of output 162 [2021-12-18 00:41:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 00:41:23,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 00:41:23,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361279202] [2021-12-18 00:41:23,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361279202] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:41:23,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:41:23,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-12-18 00:41:23,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032421735] [2021-12-18 00:41:23,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:41:23,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 00:41:23,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 00:41:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 00:41:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-12-18 00:41:23,649 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 26 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-18 00:41:27,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15