./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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_table_eq_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 66d360c8c29bda7e5219dac4b14837aec8d465009822b05f671b68702d836670 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 21:09:34,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 21:09:34,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 21:09:34,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 21:09:34,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 21:09:34,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 21:09:34,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 21:09:34,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 21:09:34,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 21:09:34,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 21:09:34,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 21:09:34,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 21:09:34,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 21:09:34,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 21:09:34,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 21:09:34,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 21:09:34,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 21:09:34,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 21:09:34,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 21:09:34,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 21:09:34,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 21:09:34,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 21:09:34,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 21:09:34,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 21:09:34,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 21:09:34,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 21:09:34,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 21:09:34,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 21:09:34,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 21:09:34,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 21:09:34,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 21:09:34,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 21:09:34,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 21:09:34,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 21:09:34,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 21:09:34,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 21:09:34,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 21:09:34,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 21:09:34,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 21:09:34,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 21:09:34,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 21:09:34,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-16 21:09:34,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 21:09:34,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 21:09:34,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 21:09:34,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 21:09:34,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 21:09:34,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 21:09:34,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 21:09:34,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 21:09:34,334 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 21:09:34,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 21:09:34,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-16 21:09:34,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 21:09:34,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 21:09:34,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 21:09:34,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 21:09:34,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 21:09:34,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 21:09:34,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 21:09:34,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 21:09:34,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 21:09:34,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 21:09:34,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:09:34,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 21:09:34,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 21:09:34,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 21:09:34,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-16 21:09:34,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-16 21:09:34,339 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 21:09:34,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 21:09:34,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 21:09:34,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 21:09:34,340 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66d360c8c29bda7e5219dac4b14837aec8d465009822b05f671b68702d836670 [2021-11-16 21:09:34,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 21:09:34,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 21:09:34,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 21:09:34,651 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 21:09:34,652 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 21:09:34,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i [2021-11-16 21:09:34,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd504a7a1/00937aa899684440810938f315fb8093/FLAGff95c0304 [2021-11-16 21:09:35,516 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 21:09:35,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i [2021-11-16 21:09:35,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd504a7a1/00937aa899684440810938f315fb8093/FLAGff95c0304 [2021-11-16 21:09:35,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd504a7a1/00937aa899684440810938f315fb8093 [2021-11-16 21:09:35,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 21:09:35,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 21:09:35,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 21:09:35,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 21:09:35,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 21:09:35,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:09:35" (1/1) ... [2021-11-16 21:09:35,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18613864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:35, skipping insertion in model container [2021-11-16 21:09:35,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:09:35" (1/1) ... [2021-11-16 21:09:35,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 21:09:35,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 21:09:36,145 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_table_eq_harness.i[4491,4504] [2021-11-16 21:09:36,154 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_table_eq_harness.i[4551,4564] [2021-11-16 21:09:36,185 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:09:36,192 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:09:37,005 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,012 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,014 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,015 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,016 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,027 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,028 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,030 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,033 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,035 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,037 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,039 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,040 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,415 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:09:37,416 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:09:37,417 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:09:37,418 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:09:37,419 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:09:37,420 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:09:37,420 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:09:37,421 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:09:37,422 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:09:37,428 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:09:37,635 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:09:37,917 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,919 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,942 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,944 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,950 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,950 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,962 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,963 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,963 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,963 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,964 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,964 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:37,964 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,003 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:09:38,036 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 21:09:38,052 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_table_eq_harness.i[4491,4504] [2021-11-16 21:09:38,053 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_table_eq_harness.i[4551,4564] [2021-11-16 21:09:38,055 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:09:38,055 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:09:38,095 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,095 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,095 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,096 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,096 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,100 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,101 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,101 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,101 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,102 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,103 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,103 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,103 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,127 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:09:38,127 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:09:38,128 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:09:38,128 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:09:38,129 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:09:38,130 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:09:38,130 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:09:38,131 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:09:38,131 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:09:38,131 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:09:38,156 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:09:38,253 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,255 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,263 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,264 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,266 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,267 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,279 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,280 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,281 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,281 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,281 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,282 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,282 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:38,301 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:09:38,547 INFO L208 MainTranslator]: Completed translation [2021-11-16 21:09:38,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38 WrapperNode [2021-11-16 21:09:38,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 21:09:38,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 21:09:38,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 21:09:38,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 21:09:38,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,773 INFO L137 Inliner]: procedures = 776, calls = 2457, calls flagged for inlining = 68, calls inlined = 18, statements flattened = 942 [2021-11-16 21:09:38,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 21:09:38,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 21:09:38,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 21:09:38,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 21:09:38,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 21:09:38,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 21:09:38,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 21:09:38,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 21:09:38,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (1/1) ... [2021-11-16 21:09:38,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:09:38,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:09:38,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 21:09:38,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 21:09:39,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-16 21:09:39,007 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_hash_table [2021-11-16 21:09:39,007 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_hash_table [2021-11-16 21:09:39,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-16 21:09:39,008 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 21:09:39,008 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 21:09:39,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 21:09:39,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 21:09:39,008 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-16 21:09:39,009 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-16 21:09:39,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 21:09:39,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 21:09:39,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 21:09:39,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 21:09:39,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 21:09:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 21:09:39,010 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 21:09:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-16 21:09:39,010 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-16 21:09:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_uaddl_overflow [2021-11-16 21:09:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 21:09:39,011 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-16 21:09:39,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-16 21:09:39,011 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-16 21:09:39,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 21:09:39,012 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 21:09:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 21:09:39,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-16 21:09:39,012 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2021-11-16 21:09:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2021-11-16 21:09:39,012 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-16 21:09:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-16 21:09:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2021-11-16 21:09:39,013 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2021-11-16 21:09:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2021-11-16 21:09:39,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2021-11-16 21:09:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 21:09:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_get_entry_count [2021-11-16 21:09:39,014 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_get_entry_count [2021-11-16 21:09:39,017 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-16 21:09:39,017 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-16 21:09:39,017 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2021-11-16 21:09:39,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2021-11-16 21:09:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2021-11-16 21:09:39,018 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2021-11-16 21:09:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2021-11-16 21:09:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2021-11-16 21:09:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 21:09:39,024 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 21:09:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-16 21:09:39,024 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-16 21:09:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 21:09:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_allocated_hash_table [2021-11-16 21:09:39,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_allocated_hash_table [2021-11-16 21:09:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-16 21:09:39,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-16 21:09:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-16 21:09:39,025 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-16 21:09:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure check_hash_table_unchanged [2021-11-16 21:09:39,025 INFO L138 BoogieDeclarations]: Found implementation of procedure check_hash_table_unchanged [2021-11-16 21:09:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-16 21:09:39,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-16 21:09:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-16 21:09:39,424 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 21:09:39,425 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 21:09:39,567 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2021-11-16 21:09:39,621 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-16 21:09:41,414 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !true; [2021-11-16 21:09:41,415 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !true; [2021-11-16 21:09:41,415 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-16 21:09:41,415 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##60: assume !true; [2021-11-16 21:09:41,415 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##51: assume !true; [2021-11-16 21:09:41,441 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 21:09:41,455 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 21:09:41,456 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-16 21:09:41,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:09:41 BoogieIcfgContainer [2021-11-16 21:09:41,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 21:09:41,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 21:09:41,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 21:09:41,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 21:09:41,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 09:09:35" (1/3) ... [2021-11-16 21:09:41,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d56d87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:09:41, skipping insertion in model container [2021-11-16 21:09:41,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:38" (2/3) ... [2021-11-16 21:09:41,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d56d87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:09:41, skipping insertion in model container [2021-11-16 21:09:41,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:09:41" (3/3) ... [2021-11-16 21:09:41,470 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_table_eq_harness.i [2021-11-16 21:09:41,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 21:09:41,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 21:09:41,525 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 21:09:41,530 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 21:09:41,531 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 21:09:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 291 states, 183 states have (on average 1.2185792349726776) internal successors, (223), 177 states have internal predecessors, (223), 89 states have call successors, (89), 24 states have call predecessors, (89), 24 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-16 21:09:41,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-16 21:09:41,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:09:41,574 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:09:41,574 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:09:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:09:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2061328642, now seen corresponding path program 1 times [2021-11-16 21:09:41,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-16 21:09:41,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351444461] [2021-11-16 21:09:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:09:41,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-16 21:09:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:09:42,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-16 21:09:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:09:42,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-16 21:09:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:09:42,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-16 21:09:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:09:42,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-16 21:09:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:09:42,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-16 21:09:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:09:42,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-16 21:09:42,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-16 21:09:42,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-16 21:09:42,227 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig$NestedTraceCheckException: UNKNOWN during nested interpolation. I don't know how to continue at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:396) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck$TraceCheckLock@47c1de48 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.lockAndPrepareSolverForTraceCheck(TraceCheck.java:496) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:294) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:379) ... 31 more [2021-11-16 21:09:42,233 INFO L158 Benchmark]: Toolchain (without parser) took 6503.32ms. Allocated memory was 109.1MB in the beginning and 188.7MB in the end (delta: 79.7MB). Free memory was 68.4MB in the beginning and 114.8MB in the end (delta: -46.4MB). Peak memory consumption was 33.3MB. Max. memory is 16.1GB. [2021-11-16 21:09:42,234 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 56.1MB in the beginning and 56.0MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-16 21:09:42,234 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2817.69ms. Allocated memory was 109.1MB in the beginning and 140.5MB in the end (delta: 31.5MB). Free memory was 67.8MB in the beginning and 68.7MB in the end (delta: -851.7kB). Peak memory consumption was 61.1MB. Max. memory is 16.1GB. [2021-11-16 21:09:42,235 INFO L158 Benchmark]: Boogie Procedure Inliner took 225.80ms. Allocated memory is still 140.5MB. Free memory was 68.7MB in the beginning and 56.8MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-16 21:09:42,235 INFO L158 Benchmark]: Boogie Preprocessor took 146.56ms. Allocated memory is still 140.5MB. Free memory was 56.8MB in the beginning and 84.0MB in the end (delta: -27.2MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2021-11-16 21:09:42,236 INFO L158 Benchmark]: RCFGBuilder took 2535.99ms. Allocated memory was 140.5MB in the beginning and 188.7MB in the end (delta: 48.2MB). Free memory was 84.0MB in the beginning and 118.8MB in the end (delta: -34.9MB). Peak memory consumption was 68.7MB. Max. memory is 16.1GB. [2021-11-16 21:09:42,236 INFO L158 Benchmark]: TraceAbstraction took 768.15ms. Allocated memory is still 188.7MB. Free memory was 117.8MB in the beginning and 114.8MB in the end (delta: 3.0MB). Peak memory consumption was 1.9MB. Max. memory is 16.1GB. [2021-11-16 21:09:42,240 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 56.1MB in the beginning and 56.0MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2817.69ms. Allocated memory was 109.1MB in the beginning and 140.5MB in the end (delta: 31.5MB). Free memory was 67.8MB in the beginning and 68.7MB in the end (delta: -851.7kB). Peak memory consumption was 61.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 225.80ms. Allocated memory is still 140.5MB. Free memory was 68.7MB in the beginning and 56.8MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 146.56ms. Allocated memory is still 140.5MB. Free memory was 56.8MB in the beginning and 84.0MB in the end (delta: -27.2MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * RCFGBuilder took 2535.99ms. Allocated memory was 140.5MB in the beginning and 188.7MB in the end (delta: 48.2MB). Free memory was 84.0MB in the beginning and 118.8MB in the end (delta: -34.9MB). Peak memory consumption was 68.7MB. Max. memory is 16.1GB. * TraceAbstraction took 768.15ms. Allocated memory is still 188.7MB. Free memory was 117.8MB in the beginning and 114.8MB in the end (delta: 3.0MB). Peak memory consumption was 1.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NestedTraceCheckException: UNKNOWN during nested interpolation. I don't know how to continue de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NestedTraceCheckException: UNKNOWN during nested interpolation. I don't know how to continue: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:396) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-16 21:09:42,285 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_table_eq_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 66d360c8c29bda7e5219dac4b14837aec8d465009822b05f671b68702d836670 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-16 21:09:44,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-16 21:09:44,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-16 21:09:44,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-16 21:09:44,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-16 21:09:44,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-16 21:09:44,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-16 21:09:44,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-16 21:09:44,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-16 21:09:44,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-16 21:09:44,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-16 21:09:44,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-16 21:09:44,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-16 21:09:44,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-16 21:09:44,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-16 21:09:44,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-16 21:09:44,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-16 21:09:44,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-16 21:09:44,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-16 21:09:44,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-16 21:09:44,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-16 21:09:44,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-16 21:09:44,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-16 21:09:44,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-16 21:09:44,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-16 21:09:44,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-16 21:09:44,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-16 21:09:44,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-16 21:09:44,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-16 21:09:44,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-16 21:09:44,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-16 21:09:44,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-16 21:09:44,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-16 21:09:44,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-16 21:09:44,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-16 21:09:44,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-16 21:09:44,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-16 21:09:44,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-16 21:09:44,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-16 21:09:44,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-16 21:09:44,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-16 21:09:44,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-16 21:09:44,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-16 21:09:44,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-16 21:09:44,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-16 21:09:44,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-16 21:09:44,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-16 21:09:44,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-16 21:09:44,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-16 21:09:44,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-16 21:09:44,469 INFO L138 SettingsManager]: * Use SBE=true [2021-11-16 21:09:44,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-16 21:09:44,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-16 21:09:44,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-16 21:09:44,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-16 21:09:44,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-16 21:09:44,471 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-16 21:09:44,471 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-16 21:09:44,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-16 21:09:44,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-16 21:09:44,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-16 21:09:44,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-16 21:09:44,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-16 21:09:44,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-16 21:09:44,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:09:44,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-16 21:09:44,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-16 21:09:44,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-16 21:09:44,473 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-16 21:09:44,473 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-16 21:09:44,473 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-16 21:09:44,473 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-16 21:09:44,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-16 21:09:44,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-16 21:09:44,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-16 21:09:44,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66d360c8c29bda7e5219dac4b14837aec8d465009822b05f671b68702d836670 [2021-11-16 21:09:44,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-16 21:09:44,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-16 21:09:44,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-16 21:09:44,836 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-16 21:09:44,837 INFO L275 PluginConnector]: CDTParser initialized [2021-11-16 21:09:44,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i [2021-11-16 21:09:44,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d14b79b4a/af4c57f0ed9745259750f5ca9f308393/FLAG5402120ff [2021-11-16 21:09:45,746 INFO L306 CDTParser]: Found 1 translation units. [2021-11-16 21:09:45,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_hash_table_eq_harness.i [2021-11-16 21:09:45,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d14b79b4a/af4c57f0ed9745259750f5ca9f308393/FLAG5402120ff [2021-11-16 21:09:45,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d14b79b4a/af4c57f0ed9745259750f5ca9f308393 [2021-11-16 21:09:45,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-16 21:09:45,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-16 21:09:45,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-16 21:09:45,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-16 21:09:45,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-16 21:09:45,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:09:45" (1/1) ... [2021-11-16 21:09:45,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6d9627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:45, skipping insertion in model container [2021-11-16 21:09:45,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 09:09:45" (1/1) ... [2021-11-16 21:09:45,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-16 21:09:46,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-16 21:09:46,335 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_table_eq_harness.i[4491,4504] [2021-11-16 21:09:46,345 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_table_eq_harness.i[4551,4564] [2021-11-16 21:09:46,381 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:09:46,390 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:09:47,306 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,308 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,309 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,309 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,311 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,322 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,323 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,324 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,325 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,326 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,327 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,327 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,328 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:47,642 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:09:47,643 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:09:47,644 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:09:47,645 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:09:47,646 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:09:47,646 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:09:47,647 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:09:47,647 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:09:47,648 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:09:47,657 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:09:47,798 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:09:48,110 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,110 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,138 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,139 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,147 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,148 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,166 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,167 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,168 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,168 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,169 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,169 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,169 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,230 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:09:48,273 INFO L203 MainTranslator]: Completed pre-run [2021-11-16 21:09:48,292 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_table_eq_harness.i[4491,4504] [2021-11-16 21:09:48,293 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_table_eq_harness.i[4551,4564] [2021-11-16 21:09:48,297 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-16 21:09:48,297 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-16 21:09:48,332 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,332 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,333 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,333 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,334 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,341 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,343 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,343 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,344 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,345 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,345 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,346 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,346 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,380 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-16 21:09:48,385 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-16 21:09:48,386 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-16 21:09:48,387 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-16 21:09:48,388 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-16 21:09:48,389 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-16 21:09:48,391 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-16 21:09:48,392 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-16 21:09:48,392 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-16 21:09:48,392 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-16 21:09:48,429 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-16 21:09:48,516 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,527 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,533 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,534 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,537 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,537 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,549 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,549 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,550 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,550 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,550 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,551 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,551 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-16 21:09:48,567 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-16 21:09:48,796 INFO L208 MainTranslator]: Completed translation [2021-11-16 21:09:48,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48 WrapperNode [2021-11-16 21:09:48,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-16 21:09:48,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-16 21:09:48,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-16 21:09:48,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-16 21:09:48,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:48,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:49,052 INFO L137 Inliner]: procedures = 796, calls = 2457, calls flagged for inlining = 70, calls inlined = 17, statements flattened = 928 [2021-11-16 21:09:49,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-16 21:09:49,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-16 21:09:49,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-16 21:09:49,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-16 21:09:49,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:49,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:49,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:49,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:49,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:49,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:49,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:49,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-16 21:09:49,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-16 21:09:49,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-16 21:09:49,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-16 21:09:49,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (1/1) ... [2021-11-16 21:09:49,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-16 21:09:49,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-16 21:09:49,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-16 21:09:49,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-16 21:09:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-11-16 21:09:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_hash_table [2021-11-16 21:09:49,270 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_hash_table [2021-11-16 21:09:49,271 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-16 21:09:49,271 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-16 21:09:49,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-16 21:09:49,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-16 21:09:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-16 21:09:49,272 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-16 21:09:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-16 21:09:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-16 21:09:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-16 21:09:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-16 21:09:49,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-16 21:09:49,277 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-16 21:09:49,277 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-16 21:09:49,277 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-16 21:09:49,277 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-16 21:09:49,277 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_uaddl_overflow [2021-11-16 21:09:49,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-16 21:09:49,278 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-16 21:09:49,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-16 21:09:49,278 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-16 21:09:49,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-16 21:09:49,278 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-16 21:09:49,279 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-16 21:09:49,279 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2021-11-16 21:09:49,279 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2021-11-16 21:09:49,279 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-16 21:09:49,279 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-16 21:09:49,279 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2021-11-16 21:09:49,280 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2021-11-16 21:09:49,280 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2021-11-16 21:09:49,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2021-11-16 21:09:49,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-16 21:09:49,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-16 21:09:49,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-16 21:09:49,280 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_get_entry_count [2021-11-16 21:09:49,281 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_get_entry_count [2021-11-16 21:09:49,281 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-16 21:09:49,281 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-16 21:09:49,281 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2021-11-16 21:09:49,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2021-11-16 21:09:49,281 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2021-11-16 21:09:49,281 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2021-11-16 21:09:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-16 21:09:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-16 21:09:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2021-11-16 21:09:49,282 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2021-11-16 21:09:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-16 21:09:49,282 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-16 21:09:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-16 21:09:49,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-16 21:09:49,283 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-16 21:09:49,283 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-16 21:09:49,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-16 21:09:49,283 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_allocated_hash_table [2021-11-16 21:09:49,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_allocated_hash_table [2021-11-16 21:09:49,284 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-16 21:09:49,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-16 21:09:49,284 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-16 21:09:49,284 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-16 21:09:49,284 INFO L130 BoogieDeclarations]: Found specification of procedure check_hash_table_unchanged [2021-11-16 21:09:49,284 INFO L138 BoogieDeclarations]: Found implementation of procedure check_hash_table_unchanged [2021-11-16 21:09:49,652 INFO L236 CfgBuilder]: Building ICFG [2021-11-16 21:09:49,655 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-16 21:09:49,818 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2021-11-16 21:09:49,974 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-16 21:09:52,927 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !true; [2021-11-16 21:09:52,927 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !true; [2021-11-16 21:09:52,927 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2021-11-16 21:09:52,927 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##60: assume !true; [2021-11-16 21:09:52,928 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##51: assume !true; [2021-11-16 21:09:52,951 INFO L277 CfgBuilder]: Performing block encoding [2021-11-16 21:09:52,966 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-16 21:09:52,966 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-16 21:09:52,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:09:52 BoogieIcfgContainer [2021-11-16 21:09:52,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-16 21:09:52,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-16 21:09:52,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-16 21:09:52,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-16 21:09:52,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 09:09:45" (1/3) ... [2021-11-16 21:09:52,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5612dbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:09:52, skipping insertion in model container [2021-11-16 21:09:52,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 09:09:48" (2/3) ... [2021-11-16 21:09:52,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5612dbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 09:09:52, skipping insertion in model container [2021-11-16 21:09:52,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 09:09:52" (3/3) ... [2021-11-16 21:09:52,979 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_table_eq_harness.i [2021-11-16 21:09:52,983 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-16 21:09:52,984 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-16 21:09:53,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-16 21:09:53,057 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-16 21:09:53,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-16 21:09:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 276 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 166 states have internal predecessors, (211), 86 states have call successors, (86), 23 states have call predecessors, (86), 23 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-16 21:09:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-16 21:09:53,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:09:53,107 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:09:53,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:09:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:09:53,113 INFO L85 PathProgramCache]: Analyzing trace with hash 448295814, now seen corresponding path program 1 times [2021-11-16 21:09:53,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:09:53,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252571471] [2021-11-16 21:09:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:09:53,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:09:53,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:09:53,135 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) [2021-11-16 21:09:53,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-16 21:09:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:09:54,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-16 21:09:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:09:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-11-16 21:09:54,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:09:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2021-11-16 21:09:55,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:09:55,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252571471] [2021-11-16 21:09:55,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252571471] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:09:55,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:09:55,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-16 21:09:55,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132184264] [2021-11-16 21:09:55,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:09:55,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-16 21:09:55,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:09:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-16 21:09:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 21:09:55,520 INFO L87 Difference]: Start difference. First operand has 276 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 166 states have internal predecessors, (211), 86 states have call successors, (86), 23 states have call predecessors, (86), 23 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-16 21:09:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:09:55,587 INFO L93 Difference]: Finished difference Result 548 states and 807 transitions. [2021-11-16 21:09:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-16 21:09:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 281 [2021-11-16 21:09:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:09:55,610 INFO L225 Difference]: With dead ends: 548 [2021-11-16 21:09:55,610 INFO L226 Difference]: Without dead ends: 270 [2021-11-16 21:09:55,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-16 21:09:55,623 INFO L933 BasicCegarLoop]: 370 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, 370 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 [2021-11-16 21:09:55,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:09:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-16 21:09:55,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-11-16 21:09:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 160 states have (on average 1.2125) internal successors, (194), 161 states have internal predecessors, (194), 86 states have call successors, (86), 23 states have call predecessors, (86), 23 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2021-11-16 21:09:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 365 transitions. [2021-11-16 21:09:55,692 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 365 transitions. Word has length 281 [2021-11-16 21:09:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:09:55,693 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 365 transitions. [2021-11-16 21:09:55,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-16 21:09:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 365 transitions. [2021-11-16 21:09:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-16 21:09:55,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:09:55,699 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:09:55,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-16 21:09:55,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:09:55,900 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:09:55,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:09:55,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1090035532, now seen corresponding path program 1 times [2021-11-16 21:09:55,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:09:55,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403877213] [2021-11-16 21:09:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:09:55,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:09:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:09:55,906 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) [2021-11-16 21:09:55,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-16 21:09:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:09:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-16 21:09:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:09:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-11-16 21:09:57,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:09:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2021-11-16 21:09:58,275 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:09:58,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403877213] [2021-11-16 21:09:58,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403877213] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:09:58,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:09:58,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-16 21:09:58,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362782796] [2021-11-16 21:09:58,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:09:58,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:09:58,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:09:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:09:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:09:58,280 INFO L87 Difference]: Start difference. First operand 270 states and 365 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-16 21:09:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:09:58,378 INFO L93 Difference]: Finished difference Result 541 states and 737 transitions. [2021-11-16 21:09:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:09:58,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) Word has length 281 [2021-11-16 21:09:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:09:58,383 INFO L225 Difference]: With dead ends: 541 [2021-11-16 21:09:58,383 INFO L226 Difference]: Without dead ends: 274 [2021-11-16 21:09:58,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:09:58,385 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 2 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:09:58,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1448 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-16 21:09:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-16 21:09:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2021-11-16 21:09:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 164 states have internal predecessors, (197), 86 states have call successors, (86), 23 states have call predecessors, (86), 24 states have return successors, (86), 86 states have call predecessors, (86), 85 states have call successors, (86) [2021-11-16 21:09:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 369 transitions. [2021-11-16 21:09:58,415 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 369 transitions. Word has length 281 [2021-11-16 21:09:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:09:58,417 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 369 transitions. [2021-11-16 21:09:58,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-16 21:09:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 369 transitions. [2021-11-16 21:09:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-16 21:09:58,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:09:58,424 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:09:58,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-16 21:09:58,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:09:58,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:09:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:09:58,640 INFO L85 PathProgramCache]: Analyzing trace with hash 224607552, now seen corresponding path program 1 times [2021-11-16 21:09:58,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:09:58,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907365598] [2021-11-16 21:09:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:09:58,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:09:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:09:58,645 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) [2021-11-16 21:09:58,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-16 21:09:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:09:59,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 21:09:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:10:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2021-11-16 21:10:00,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:10:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2021-11-16 21:10:00,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:10:00,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907365598] [2021-11-16 21:10:00,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907365598] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:10:00,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:10:00,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-16 21:10:00,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069750615] [2021-11-16 21:10:00,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:10:00,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:10:00,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:10:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:10:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:10:00,909 INFO L87 Difference]: Start difference. First operand 274 states and 369 transitions. Second operand has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-16 21:10:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:10:01,152 INFO L93 Difference]: Finished difference Result 548 states and 741 transitions. [2021-11-16 21:10:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:10:01,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 305 [2021-11-16 21:10:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:10:01,156 INFO L225 Difference]: With dead ends: 548 [2021-11-16 21:10:01,156 INFO L226 Difference]: Without dead ends: 276 [2021-11-16 21:10:01,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:10:01,158 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 2 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:10:01,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1672 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:10:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-16 21:10:01,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2021-11-16 21:10:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 166 states have internal predecessors, (198), 86 states have call successors, (86), 23 states have call predecessors, (86), 25 states have return successors, (87), 86 states have call predecessors, (87), 85 states have call successors, (87) [2021-11-16 21:10:01,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 371 transitions. [2021-11-16 21:10:01,175 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 371 transitions. Word has length 305 [2021-11-16 21:10:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:10:01,175 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 371 transitions. [2021-11-16 21:10:01,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-16 21:10:01,176 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 371 transitions. [2021-11-16 21:10:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-16 21:10:01,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:10:01,180 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:10:01,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-16 21:10:01,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:10:01,397 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:10:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:10:01,398 INFO L85 PathProgramCache]: Analyzing trace with hash 947024628, now seen corresponding path program 1 times [2021-11-16 21:10:01,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:10:01,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808776979] [2021-11-16 21:10:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:10:01,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:10:01,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:10:01,401 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) [2021-11-16 21:10:01,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-16 21:10:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:10:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-16 21:10:02,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:10:02,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-16 21:10:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-11-16 21:10:03,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:10:04,612 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 30 treesize of output 26 [2021-11-16 21:10:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2021-11-16 21:10:04,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:10:04,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808776979] [2021-11-16 21:10:04,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808776979] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:10:04,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:10:04,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 16 [2021-11-16 21:10:04,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400519162] [2021-11-16 21:10:04,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:10:04,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 21:10:04,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:10:04,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 21:10:04,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:10:04,866 INFO L87 Difference]: Start difference. First operand 276 states and 371 transitions. Second operand has 12 states, 11 states have (on average 9.454545454545455) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (48), 3 states have call predecessors, (48), 5 states have return successors, (47), 5 states have call predecessors, (47), 4 states have call successors, (47) [2021-11-16 21:10:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:10:05,071 INFO L93 Difference]: Finished difference Result 560 states and 751 transitions. [2021-11-16 21:10:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:10:05,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 9.454545454545455) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (48), 3 states have call predecessors, (48), 5 states have return successors, (47), 5 states have call predecessors, (47), 4 states have call successors, (47) Word has length 315 [2021-11-16 21:10:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:10:05,075 INFO L225 Difference]: With dead ends: 560 [2021-11-16 21:10:05,075 INFO L226 Difference]: Without dead ends: 285 [2021-11-16 21:10:05,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:10:05,080 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 19 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-16 21:10:05,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1777 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-11-16 21:10:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-16 21:10:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-11-16 21:10:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 174 states have internal predecessors, (208), 86 states have call successors, (86), 24 states have call predecessors, (86), 26 states have return successors, (88), 86 states have call predecessors, (88), 85 states have call successors, (88) [2021-11-16 21:10:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 382 transitions. [2021-11-16 21:10:05,110 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 382 transitions. Word has length 315 [2021-11-16 21:10:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:10:05,112 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 382 transitions. [2021-11-16 21:10:05,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 9.454545454545455) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (48), 3 states have call predecessors, (48), 5 states have return successors, (47), 5 states have call predecessors, (47), 4 states have call successors, (47) [2021-11-16 21:10:05,112 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 382 transitions. [2021-11-16 21:10:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-16 21:10:05,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:10:05,125 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:10:05,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-16 21:10:05,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:10:05,328 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:10:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:10:05,329 INFO L85 PathProgramCache]: Analyzing trace with hash 605345714, now seen corresponding path program 1 times [2021-11-16 21:10:05,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:10:05,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584507773] [2021-11-16 21:10:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:10:05,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:10:05,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:10:05,331 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) [2021-11-16 21:10:05,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-16 21:10:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:10:06,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 21:10:06,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:10:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-11-16 21:10:06,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:10:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-11-16 21:10:07,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:10:07,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584507773] [2021-11-16 21:10:07,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584507773] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:10:07,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:10:07,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-16 21:10:07,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595684328] [2021-11-16 21:10:07,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:10:07,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:10:07,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:10:07,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:10:07,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:10:07,453 INFO L87 Difference]: Start difference. First operand 285 states and 382 transitions. Second operand has 5 states, 4 states have (on average 26.0) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-16 21:10:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:10:07,693 INFO L93 Difference]: Finished difference Result 564 states and 773 transitions. [2021-11-16 21:10:07,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:10:07,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 26.0) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 315 [2021-11-16 21:10:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:10:07,696 INFO L225 Difference]: With dead ends: 564 [2021-11-16 21:10:07,697 INFO L226 Difference]: Without dead ends: 287 [2021-11-16 21:10:07,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:10:07,699 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 59 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:10:07,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1321 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:10:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-16 21:10:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-11-16 21:10:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 173 states have (on average 1.2023121387283238) internal successors, (208), 175 states have internal predecessors, (208), 87 states have call successors, (87), 24 states have call predecessors, (87), 26 states have return successors, (103), 87 states have call predecessors, (103), 86 states have call successors, (103) [2021-11-16 21:10:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 398 transitions. [2021-11-16 21:10:07,715 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 398 transitions. Word has length 315 [2021-11-16 21:10:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:10:07,716 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 398 transitions. [2021-11-16 21:10:07,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 26.0) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-16 21:10:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 398 transitions. [2021-11-16 21:10:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-16 21:10:07,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:10:07,719 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:10:07,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-16 21:10:07,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:10:07,932 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:10:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:10:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1717919787, now seen corresponding path program 1 times [2021-11-16 21:10:07,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:10:07,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399319920] [2021-11-16 21:10:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:10:07,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:10:07,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:10:07,936 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) [2021-11-16 21:10:07,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-16 21:10:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:10:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-16 21:10:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:10:08,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-16 21:10:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-11-16 21:10:10,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:10:11,112 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 30 treesize of output 26 [2021-11-16 21:10:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2021-11-16 21:10:11,358 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:10:11,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399319920] [2021-11-16 21:10:11,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399319920] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:10:11,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:10:11,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12] total 18 [2021-11-16 21:10:11,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783285965] [2021-11-16 21:10:11,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:10:11,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 21:10:11,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:10:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 21:10:11,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:10:11,360 INFO L87 Difference]: Start difference. First operand 287 states and 398 transitions. Second operand has 13 states, 11 states have (on average 9.818181818181818) internal successors, (108), 10 states have internal predecessors, (108), 5 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 5 states have call successors, (48) [2021-11-16 21:10:13,452 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:10:15,460 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:10:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:10:16,232 INFO L93 Difference]: Finished difference Result 575 states and 797 transitions. [2021-11-16 21:10:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 21:10:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.818181818181818) internal successors, (108), 10 states have internal predecessors, (108), 5 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 5 states have call successors, (48) Word has length 321 [2021-11-16 21:10:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:10:16,248 INFO L225 Difference]: With dead ends: 575 [2021-11-16 21:10:16,248 INFO L226 Difference]: Without dead ends: 290 [2021-11-16 21:10:16,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:10:16,250 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 9 mSDsluCounter, 3261 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3618 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-16 21:10:16,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3618 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 2 Unknown, 242 Unchecked, 4.8s Time] [2021-11-16 21:10:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-16 21:10:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-11-16 21:10:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 175 states have (on average 1.2) internal successors, (210), 177 states have internal predecessors, (210), 88 states have call successors, (88), 25 states have call predecessors, (88), 26 states have return successors, (104), 87 states have call predecessors, (104), 87 states have call successors, (104) [2021-11-16 21:10:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 402 transitions. [2021-11-16 21:10:16,280 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 402 transitions. Word has length 321 [2021-11-16 21:10:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:10:16,282 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 402 transitions. [2021-11-16 21:10:16,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.818181818181818) internal successors, (108), 10 states have internal predecessors, (108), 5 states have call successors, (49), 3 states have call predecessors, (49), 6 states have return successors, (48), 6 states have call predecessors, (48), 5 states have call successors, (48) [2021-11-16 21:10:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 402 transitions. [2021-11-16 21:10:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-16 21:10:16,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:10:16,285 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:10:16,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-16 21:10:16,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:10:16,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:10:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:10:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 870325970, now seen corresponding path program 1 times [2021-11-16 21:10:16,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:10:16,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380918486] [2021-11-16 21:10:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:10:16,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:10:16,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:10:16,511 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) [2021-11-16 21:10:16,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-16 21:10:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:10:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 21:10:17,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:10:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 427 proven. 0 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-11-16 21:10:17,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:10:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2021-11-16 21:10:18,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:10:18,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380918486] [2021-11-16 21:10:18,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380918486] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:10:18,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:10:18,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-16 21:10:18,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234879996] [2021-11-16 21:10:18,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:10:18,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:10:18,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:10:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:10:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:10:18,705 INFO L87 Difference]: Start difference. First operand 290 states and 402 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-16 21:10:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:10:18,944 INFO L93 Difference]: Finished difference Result 567 states and 789 transitions. [2021-11-16 21:10:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:10:18,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 326 [2021-11-16 21:10:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:10:18,948 INFO L225 Difference]: With dead ends: 567 [2021-11-16 21:10:18,948 INFO L226 Difference]: Without dead ends: 288 [2021-11-16 21:10:18,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-16 21:10:18,950 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 2 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:10:18,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1672 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:10:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-16 21:10:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2021-11-16 21:10:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 171 states have (on average 1.1929824561403508) internal successors, (204), 172 states have internal predecessors, (204), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (102), 86 states have call predecessors, (102), 87 states have call successors, (102) [2021-11-16 21:10:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 394 transitions. [2021-11-16 21:10:18,964 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 394 transitions. Word has length 326 [2021-11-16 21:10:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:10:18,965 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 394 transitions. [2021-11-16 21:10:18,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (53), 2 states have call predecessors, (53), 4 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-16 21:10:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 394 transitions. [2021-11-16 21:10:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-11-16 21:10:18,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:10:18,967 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:10:19,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-16 21:10:19,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:10:19,184 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:10:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:10:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1951086534, now seen corresponding path program 1 times [2021-11-16 21:10:19,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:10:19,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201644809] [2021-11-16 21:10:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:10:19,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:10:19,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:10:19,187 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) [2021-11-16 21:10:19,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-16 21:10:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:10:20,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1952 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-16 21:10:20,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:10:20,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-16 21:10:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 455 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-11-16 21:10:21,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:10:22,034 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 30 treesize of output 26 [2021-11-16 21:10:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2021-11-16 21:10:22,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:10:22,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201644809] [2021-11-16 21:10:22,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201644809] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:10:22,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:10:22,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 16 [2021-11-16 21:10:22,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973464390] [2021-11-16 21:10:22,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:10:22,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-16 21:10:22,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:10:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-16 21:10:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-16 21:10:22,503 INFO L87 Difference]: Start difference. First operand 284 states and 394 transitions. Second operand has 12 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 4 states have call successors, (50), 3 states have call predecessors, (50), 5 states have return successors, (49), 5 states have call predecessors, (49), 4 states have call successors, (49) [2021-11-16 21:10:24,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:10:26,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:10:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:10:27,250 INFO L93 Difference]: Finished difference Result 536 states and 745 transitions. [2021-11-16 21:10:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-16 21:10:27,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 4 states have call successors, (50), 3 states have call predecessors, (50), 5 states have return successors, (49), 5 states have call predecessors, (49), 4 states have call successors, (49) Word has length 336 [2021-11-16 21:10:27,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:10:27,254 INFO L225 Difference]: With dead ends: 536 [2021-11-16 21:10:27,255 INFO L226 Difference]: Without dead ends: 288 [2021-11-16 21:10:27,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-16 21:10:27,256 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 6 mSDsluCounter, 2301 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2662 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-16 21:10:27,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 2662 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 2 Unknown, 74 Unchecked, 4.7s Time] [2021-11-16 21:10:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-16 21:10:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-16 21:10:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 175 states have (on average 1.1942857142857144) internal successors, (209), 175 states have internal predecessors, (209), 88 states have call successors, (88), 26 states have call predecessors, (88), 24 states have return successors, (102), 86 states have call predecessors, (102), 87 states have call successors, (102) [2021-11-16 21:10:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 399 transitions. [2021-11-16 21:10:27,270 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 399 transitions. Word has length 336 [2021-11-16 21:10:27,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:10:27,271 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 399 transitions. [2021-11-16 21:10:27,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 4 states have call successors, (50), 3 states have call predecessors, (50), 5 states have return successors, (49), 5 states have call predecessors, (49), 4 states have call successors, (49) [2021-11-16 21:10:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 399 transitions. [2021-11-16 21:10:27,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-11-16 21:10:27,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:10:27,273 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:10:27,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-16 21:10:27,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:10:27,488 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:10:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:10:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash 726440312, now seen corresponding path program 1 times [2021-11-16 21:10:27,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:10:27,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884622150] [2021-11-16 21:10:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:10:27,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:10:27,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:10:27,491 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) [2021-11-16 21:10:27,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-16 21:10:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:10:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-16 21:10:28,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:10:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-11-16 21:10:29,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:10:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-16 21:10:29,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:10:29,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884622150] [2021-11-16 21:10:29,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884622150] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:10:29,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:10:29,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-16 21:10:29,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033285088] [2021-11-16 21:10:29,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:10:29,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-16 21:10:29,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:10:29,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-16 21:10:29,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:10:29,943 INFO L87 Difference]: Start difference. First operand 288 states and 399 transitions. Second operand has 5 states, 4 states have (on average 25.25) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-16 21:10:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:10:30,157 INFO L93 Difference]: Finished difference Result 533 states and 741 transitions. [2021-11-16 21:10:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-16 21:10:30,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 25.25) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 336 [2021-11-16 21:10:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:10:30,161 INFO L225 Difference]: With dead ends: 533 [2021-11-16 21:10:30,161 INFO L226 Difference]: Without dead ends: 288 [2021-11-16 21:10:30,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-16 21:10:30,164 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 57 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:10:30,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1322 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:10:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-16 21:10:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-16 21:10:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 175 states have (on average 1.1942857142857144) internal successors, (209), 175 states have internal predecessors, (209), 88 states have call successors, (88), 26 states have call predecessors, (88), 24 states have return successors, (99), 86 states have call predecessors, (99), 87 states have call successors, (99) [2021-11-16 21:10:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 396 transitions. [2021-11-16 21:10:30,176 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 396 transitions. Word has length 336 [2021-11-16 21:10:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:10:30,177 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 396 transitions. [2021-11-16 21:10:30,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 25.25) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-16 21:10:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 396 transitions. [2021-11-16 21:10:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-16 21:10:30,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:10:30,180 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:10:30,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-16 21:10:30,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:10:30,399 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:10:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:10:30,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1622214181, now seen corresponding path program 1 times [2021-11-16 21:10:30,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:10:30,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55093992] [2021-11-16 21:10:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:10:30,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:10:30,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:10:30,405 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) [2021-11-16 21:10:30,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-16 21:10:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:10:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-16 21:10:31,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:10:31,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-16 21:10:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-11-16 21:10:32,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:10:33,646 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 30 treesize of output 26 [2021-11-16 21:10:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-16 21:10:34,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:10:34,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55093992] [2021-11-16 21:10:34,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55093992] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:10:34,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:10:34,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12] total 18 [2021-11-16 21:10:34,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079141166] [2021-11-16 21:10:34,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:10:34,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-16 21:10:34,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:10:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-16 21:10:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-16 21:10:34,095 INFO L87 Difference]: Start difference. First operand 288 states and 396 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 5 states have call successors, (51), 3 states have call predecessors, (51), 6 states have return successors, (50), 6 states have call predecessors, (50), 5 states have call successors, (50) [2021-11-16 21:10:36,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:10:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:10:36,681 INFO L93 Difference]: Finished difference Result 552 states and 758 transitions. [2021-11-16 21:10:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-16 21:10:36,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 5 states have call successors, (51), 3 states have call predecessors, (51), 6 states have return successors, (50), 6 states have call predecessors, (50), 5 states have call successors, (50) Word has length 342 [2021-11-16 21:10:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:10:36,685 INFO L225 Difference]: With dead ends: 552 [2021-11-16 21:10:36,685 INFO L226 Difference]: Without dead ends: 291 [2021-11-16 21:10:36,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-16 21:10:36,688 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 14 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-16 21:10:36,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2107 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 1 Unknown, 121 Unchecked, 2.4s Time] [2021-11-16 21:10:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-16 21:10:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 284. [2021-11-16 21:10:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 171 states have (on average 1.1929824561403508) internal successors, (204), 172 states have internal predecessors, (204), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (99), 86 states have call predecessors, (99), 87 states have call successors, (99) [2021-11-16 21:10:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 391 transitions. [2021-11-16 21:10:36,702 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 391 transitions. Word has length 342 [2021-11-16 21:10:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:10:36,703 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 391 transitions. [2021-11-16 21:10:36,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 5 states have call successors, (51), 3 states have call predecessors, (51), 6 states have return successors, (50), 6 states have call predecessors, (50), 5 states have call successors, (50) [2021-11-16 21:10:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 391 transitions. [2021-11-16 21:10:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-11-16 21:10:36,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:10:36,705 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:10:36,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-16 21:10:36,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:10:36,912 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:10:36,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:10:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1674881120, now seen corresponding path program 2 times [2021-11-16 21:10:36,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:10:36,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794222368] [2021-11-16 21:10:36,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:10:36,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:10:36,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:10:36,915 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 21:10:36,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-16 21:11:09,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:11:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:11:09,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1983 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 21:11:09,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:11:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2021-11-16 21:11:09,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:11:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-11-16 21:11:10,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:11:10,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794222368] [2021-11-16 21:11:10,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794222368] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:11:10,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:11:10,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-16 21:11:10,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632152801] [2021-11-16 21:11:10,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:11:10,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:11:10,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:11:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:11:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:11:10,657 INFO L87 Difference]: Start difference. First operand 284 states and 391 transitions. Second operand has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-16 21:11:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:11:10,852 INFO L93 Difference]: Finished difference Result 487 states and 707 transitions. [2021-11-16 21:11:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:11:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 347 [2021-11-16 21:11:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:11:10,855 INFO L225 Difference]: With dead ends: 487 [2021-11-16 21:11:10,855 INFO L226 Difference]: Without dead ends: 290 [2021-11-16 21:11:10,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:11:10,857 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 2 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:11:10,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2005 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:11:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-16 21:11:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2021-11-16 21:11:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 173 states have (on average 1.1907514450867052) internal successors, (206), 175 states have internal predecessors, (206), 88 states have call successors, (88), 25 states have call predecessors, (88), 25 states have return successors, (114), 86 states have call predecessors, (114), 87 states have call successors, (114) [2021-11-16 21:11:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 408 transitions. [2021-11-16 21:11:10,871 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 408 transitions. Word has length 347 [2021-11-16 21:11:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:11:10,872 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 408 transitions. [2021-11-16 21:11:10,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-16 21:11:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 408 transitions. [2021-11-16 21:11:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-11-16 21:11:10,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:11:10,875 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:11:10,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-16 21:11:11,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:11:11,100 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:11:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:11:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1222453825, now seen corresponding path program 2 times [2021-11-16 21:11:11,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:11:11,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210336626] [2021-11-16 21:11:11,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:11:11,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:11:11,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:11:11,103 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 21:11:11,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-16 21:11:44,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:11:44,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:11:44,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1997 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-16 21:11:44,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:11:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-16 21:11:45,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:11:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2021-11-16 21:11:46,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:11:46,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210336626] [2021-11-16 21:11:46,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210336626] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:11:46,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:11:46,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-11-16 21:11:46,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624036737] [2021-11-16 21:11:46,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:11:46,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-16 21:11:46,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:11:46,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-16 21:11:46,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-16 21:11:46,342 INFO L87 Difference]: Start difference. First operand 287 states and 408 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (37), 2 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-16 21:11:48,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:11:50,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:11:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:11:51,197 INFO L93 Difference]: Finished difference Result 491 states and 730 transitions. [2021-11-16 21:11:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-16 21:11:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (37), 2 states have call predecessors, (37), 3 states have call successors, (37) Word has length 353 [2021-11-16 21:11:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:11:51,201 INFO L225 Difference]: With dead ends: 491 [2021-11-16 21:11:51,202 INFO L226 Difference]: Without dead ends: 289 [2021-11-16 21:11:51,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-16 21:11:51,203 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 7 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-16 21:11:51,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 2323 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 2 Unknown, 165 Unchecked, 4.6s Time] [2021-11-16 21:11:51,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-16 21:11:51,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2021-11-16 21:11:51,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 173 states have (on average 1.1907514450867052) internal successors, (206), 174 states have internal predecessors, (206), 87 states have call successors, (87), 25 states have call predecessors, (87), 25 states have return successors, (113), 86 states have call predecessors, (113), 86 states have call successors, (113) [2021-11-16 21:11:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 406 transitions. [2021-11-16 21:11:51,216 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 406 transitions. Word has length 353 [2021-11-16 21:11:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:11:51,217 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 406 transitions. [2021-11-16 21:11:51,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (37), 2 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-16 21:11:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 406 transitions. [2021-11-16 21:11:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-16 21:11:51,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:11:51,220 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:11:51,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-16 21:11:51,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:11:51,435 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:11:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:11:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash 132787104, now seen corresponding path program 3 times [2021-11-16 21:11:51,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:11:51,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131041336] [2021-11-16 21:11:51,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:11:51,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:11:51,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:11:51,439 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 21:11:51,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-16 21:12:24,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-16 21:12:24,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:12:24,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 21:12:24,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:12:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2021-11-16 21:12:24,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:12:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2021-11-16 21:12:25,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:12:25,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131041336] [2021-11-16 21:12:25,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131041336] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:12:25,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:12:25,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-16 21:12:25,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022581291] [2021-11-16 21:12:25,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:12:25,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:12:25,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:12:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:12:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:12:25,771 INFO L87 Difference]: Start difference. First operand 286 states and 406 transitions. Second operand has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-16 21:12:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:12:26,061 INFO L93 Difference]: Finished difference Result 482 states and 703 transitions. [2021-11-16 21:12:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:12:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 358 [2021-11-16 21:12:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:12:26,065 INFO L225 Difference]: With dead ends: 482 [2021-11-16 21:12:26,065 INFO L226 Difference]: Without dead ends: 289 [2021-11-16 21:12:26,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 708 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:12:26,066 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 2 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:12:26,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2005 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:12:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-16 21:12:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-16 21:12:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 175 states have (on average 1.1885714285714286) internal successors, (208), 177 states have internal predecessors, (208), 87 states have call successors, (87), 25 states have call predecessors, (87), 26 states have return successors, (123), 86 states have call predecessors, (123), 86 states have call successors, (123) [2021-11-16 21:12:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 418 transitions. [2021-11-16 21:12:26,080 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 418 transitions. Word has length 358 [2021-11-16 21:12:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:12:26,081 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 418 transitions. [2021-11-16 21:12:26,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-16 21:12:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 418 transitions. [2021-11-16 21:12:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-16 21:12:26,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:12:26,084 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:12:26,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-16 21:12:26,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:12:26,299 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:12:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:12:26,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2107400608, now seen corresponding path program 4 times [2021-11-16 21:12:26,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:12:26,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212816073] [2021-11-16 21:12:26,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-16 21:12:26,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:12:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:12:26,304 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 21:12:26,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-16 21:12:27,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-16 21:12:27,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:12:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-16 21:12:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:12:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2021-11-16 21:12:28,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:12:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 48 proven. 18 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2021-11-16 21:12:29,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:12:29,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212816073] [2021-11-16 21:12:29,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212816073] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-16 21:12:29,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-16 21:12:29,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-16 21:12:29,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128721000] [2021-11-16 21:12:29,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-16 21:12:29,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-16 21:12:29,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:12:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-16 21:12:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-16 21:12:29,135 INFO L87 Difference]: Start difference. First operand 289 states and 418 transitions. Second operand has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-16 21:12:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:12:29,352 INFO L93 Difference]: Finished difference Result 491 states and 727 transitions. [2021-11-16 21:12:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-16 21:12:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 369 [2021-11-16 21:12:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:12:29,355 INFO L225 Difference]: With dead ends: 491 [2021-11-16 21:12:29,355 INFO L226 Difference]: Without dead ends: 289 [2021-11-16 21:12:29,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-16 21:12:29,357 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 2 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-16 21:12:29,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2005 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-16 21:12:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-16 21:12:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-16 21:12:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 175 states have (on average 1.1885714285714286) internal successors, (208), 177 states have internal predecessors, (208), 87 states have call successors, (87), 25 states have call predecessors, (87), 26 states have return successors, (122), 86 states have call predecessors, (122), 86 states have call successors, (122) [2021-11-16 21:12:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 417 transitions. [2021-11-16 21:12:29,370 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 417 transitions. Word has length 369 [2021-11-16 21:12:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:12:29,371 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 417 transitions. [2021-11-16 21:12:29,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-16 21:12:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 417 transitions. [2021-11-16 21:12:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-16 21:12:29,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:12:29,374 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:12:29,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-16 21:12:29,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:12:29,579 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:12:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:12:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash -133143286, now seen corresponding path program 5 times [2021-11-16 21:12:29,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:12:29,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088079482] [2021-11-16 21:12:29,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-16 21:12:29,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:12:29,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:12:29,583 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 21:12:29,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-16 21:12:48,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-16 21:12:48,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:12:48,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-16 21:12:48,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:12:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 491 proven. 11 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2021-11-16 21:12:50,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:12:51,729 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 21:12:51,730 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 32 treesize of output 31 [2021-11-16 21:12:51,744 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-16 21:12:51,744 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 27 treesize of output 19 [2021-11-16 21:12:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2021-11-16 21:12:52,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:12:52,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088079482] [2021-11-16 21:12:52,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088079482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:12:52,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:12:52,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-11-16 21:12:52,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427611987] [2021-11-16 21:12:52,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:12:52,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-16 21:12:52,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:12:52,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-16 21:12:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:12:52,254 INFO L87 Difference]: Start difference. First operand 289 states and 417 transitions. Second operand has 19 states, 18 states have (on average 6.833333333333333) internal successors, (123), 19 states have internal predecessors, (123), 6 states have call successors, (54), 3 states have call predecessors, (54), 6 states have return successors, (53), 5 states have call predecessors, (53), 6 states have call successors, (53) [2021-11-16 21:12:54,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:12:56,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:12:58,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:13:00,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:13:02,340 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:13:04,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:13:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:13:09,749 INFO L93 Difference]: Finished difference Result 581 states and 876 transitions. [2021-11-16 21:13:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-16 21:13:09,750 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 6.833333333333333) internal successors, (123), 19 states have internal predecessors, (123), 6 states have call successors, (54), 3 states have call predecessors, (54), 6 states have return successors, (53), 5 states have call predecessors, (53), 6 states have call successors, (53) Word has length 380 [2021-11-16 21:13:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:13:09,752 INFO L225 Difference]: With dead ends: 581 [2021-11-16 21:13:09,752 INFO L226 Difference]: Without dead ends: 381 [2021-11-16 21:13:09,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 736 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=271, Invalid=919, Unknown=0, NotChecked=0, Total=1190 [2021-11-16 21:13:09,754 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 130 mSDsluCounter, 2957 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 81 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-16 21:13:09,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 3361 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1263 Invalid, 6 Unknown, 310 Unchecked, 15.9s Time] [2021-11-16 21:13:09,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-16 21:13:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2021-11-16 21:13:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 205 states have (on average 1.1951219512195121) internal successors, (245), 206 states have internal predecessors, (245), 94 states have call successors, (94), 30 states have call predecessors, (94), 30 states have return successors, (138), 93 states have call predecessors, (138), 93 states have call successors, (138) [2021-11-16 21:13:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 477 transitions. [2021-11-16 21:13:09,774 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 477 transitions. Word has length 380 [2021-11-16 21:13:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:13:09,775 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 477 transitions. [2021-11-16 21:13:09,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 6.833333333333333) internal successors, (123), 19 states have internal predecessors, (123), 6 states have call successors, (54), 3 states have call predecessors, (54), 6 states have return successors, (53), 5 states have call predecessors, (53), 6 states have call successors, (53) [2021-11-16 21:13:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 477 transitions. [2021-11-16 21:13:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-16 21:13:09,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:13:09,778 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:13:09,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-16 21:13:09,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:13:09,999 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:13:10,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:13:10,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1819323124, now seen corresponding path program 2 times [2021-11-16 21:13:10,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:13:10,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602851262] [2021-11-16 21:13:10,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-16 21:13:10,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:13:10,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:13:10,003 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 21:13:10,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-16 21:13:42,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-16 21:13:42,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:13:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-16 21:13:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:13:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 417 proven. 25 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-16 21:13:46,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:13:47,564 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-16 21:13:47,565 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 32 treesize of output 31 [2021-11-16 21:13:47,572 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-16 21:13:47,572 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 27 treesize of output 19 [2021-11-16 21:13:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2021-11-16 21:13:48,064 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:13:48,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602851262] [2021-11-16 21:13:48,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602851262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-16 21:13:48,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-16 21:13:48,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-11-16 21:13:48,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481265078] [2021-11-16 21:13:48,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-16 21:13:48,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-16 21:13:48,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:13:48,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-16 21:13:48,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-16 21:13:48,066 INFO L87 Difference]: Start difference. First operand 330 states and 477 transitions. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 6 states have call successors, (52), 3 states have call predecessors, (52), 5 states have return successors, (51), 6 states have call predecessors, (51), 5 states have call successors, (51) [2021-11-16 21:13:50,137 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:13:52,147 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:13:54,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:13:56,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:13:58,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:14:00,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:14:02,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:14:04,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:14:06,181 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-16 21:14:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:14:11,641 INFO L93 Difference]: Finished difference Result 466 states and 670 transitions. [2021-11-16 21:14:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-16 21:14:11,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 6 states have call successors, (52), 3 states have call predecessors, (52), 5 states have return successors, (51), 6 states have call predecessors, (51), 5 states have call successors, (51) Word has length 380 [2021-11-16 21:14:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:14:11,645 INFO L225 Difference]: With dead ends: 466 [2021-11-16 21:14:11,645 INFO L226 Difference]: Without dead ends: 401 [2021-11-16 21:14:11,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 721 SyntacticMatches, 24 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=271, Invalid=919, Unknown=0, NotChecked=0, Total=1190 [2021-11-16 21:14:11,647 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 97 mSDsluCounter, 3209 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 28 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 3601 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2021-11-16 21:14:11,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 3601 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1419 Invalid, 9 Unknown, 164 Unchecked, 22.0s Time] [2021-11-16 21:14:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-16 21:14:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 350. [2021-11-16 21:14:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 222 states have (on average 1.1981981981981982) internal successors, (266), 223 states have internal predecessors, (266), 94 states have call successors, (94), 33 states have call predecessors, (94), 33 states have return successors, (137), 93 states have call predecessors, (137), 93 states have call successors, (137) [2021-11-16 21:14:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 497 transitions. [2021-11-16 21:14:11,666 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 497 transitions. Word has length 380 [2021-11-16 21:14:11,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:14:11,667 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 497 transitions. [2021-11-16 21:14:11,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 6 states have call successors, (52), 3 states have call predecessors, (52), 5 states have return successors, (51), 6 states have call predecessors, (51), 5 states have call successors, (51) [2021-11-16 21:14:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 497 transitions. [2021-11-16 21:14:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-16 21:14:11,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:14:11,670 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:14:11,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-16 21:14:11,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:14:11,888 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:14:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:14:11,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1561157686, now seen corresponding path program 3 times [2021-11-16 21:14:11,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:14:11,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720619054] [2021-11-16 21:14:11,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-16 21:14:11,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:14:11,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:14:11,891 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 21:14:11,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-16 21:14:47,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-16 21:14:47,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-16 21:14:47,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-16 21:14:47,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-16 21:14:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2021-11-16 21:14:47,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-16 21:14:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2021-11-16 21:14:48,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-16 21:14:48,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720619054] [2021-11-16 21:14:48,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720619054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-16 21:14:48,740 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-16 21:14:48,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-16 21:14:48,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881224924] [2021-11-16 21:14:48,741 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-16 21:14:48,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-16 21:14:48,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-16 21:14:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-16 21:14:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-16 21:14:48,742 INFO L87 Difference]: Start difference. First operand 350 states and 497 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-16 21:14:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-16 21:14:49,041 INFO L93 Difference]: Finished difference Result 600 states and 864 transitions. [2021-11-16 21:14:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-16 21:14:49,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 380 [2021-11-16 21:14:49,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-16 21:14:49,044 INFO L225 Difference]: With dead ends: 600 [2021-11-16 21:14:49,044 INFO L226 Difference]: Without dead ends: 339 [2021-11-16 21:14:49,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 754 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-16 21:14:49,046 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 101 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-16 21:14:49,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1260 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-16 21:14:49,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-16 21:14:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2021-11-16 21:14:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 212 states have (on average 1.1933962264150944) internal successors, (253), 214 states have internal predecessors, (253), 92 states have call successors, (92), 32 states have call predecessors, (92), 32 states have return successors, (120), 90 states have call predecessors, (120), 91 states have call successors, (120) [2021-11-16 21:14:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 465 transitions. [2021-11-16 21:14:49,075 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 465 transitions. Word has length 380 [2021-11-16 21:14:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-16 21:14:49,076 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 465 transitions. [2021-11-16 21:14:49,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-16 21:14:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 465 transitions. [2021-11-16 21:14:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-11-16 21:14:49,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-16 21:14:49,078 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-16 21:14:49,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-16 21:14:49,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-16 21:14:49,291 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-16 21:14:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-16 21:14:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2061255924, now seen corresponding path program 1 times [2021-11-16 21:14:49,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-16 21:14:49,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706936915] [2021-11-16 21:14:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-16 21:14:49,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-16 21:14:49,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-16 21:14:49,296 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-16 21:14:49,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-16 21:14:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-16 21:14:53,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-16 21:14:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15