./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_linked_list_begin_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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 22:12:42,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 22:12:42,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 22:12:42,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 22:12:42,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 22:12:42,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 22:12:42,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 22:12:42,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 22:12:42,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 22:12:42,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 22:12:42,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 22:12:42,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 22:12:42,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 22:12:42,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 22:12:42,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 22:12:42,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 22:12:42,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 22:12:42,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 22:12:42,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 22:12:42,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 22:12:42,781 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 22:12:42,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 22:12:42,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 22:12:42,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 22:12:42,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 22:12:42,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 22:12:42,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 22:12:42,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 22:12:42,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 22:12:42,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 22:12:42,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 22:12:42,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 22:12:42,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 22:12:42,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 22:12:42,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 22:12:42,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 22:12:42,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 22:12:42,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 22:12:42,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 22:12:42,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 22:12:42,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 22:12:42,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 22:12:42,804 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-19 22:12:42,830 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 22:12:42,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 22:12:42,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 22:12:42,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 22:12:42,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 22:12:42,832 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 22:12:42,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 22:12:42,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 22:12:42,832 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 22:12:42,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 22:12:42,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 22:12:42,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 22:12:42,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 22:12:42,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 22:12:42,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 22:12:42,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 22:12:42,834 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 22:12:42,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 22:12:42,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 22:12:42,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 22:12:42,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 22:12:42,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:12:42,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 22:12:42,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 22:12:42,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 22:12:42,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 22:12:42,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 22:12:42,835 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 22:12:42,836 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 22:12:42,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 22:12:42,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-07-19 22:12:43,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 22:12:43,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 22:12:43,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 22:12:43,079 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 22:12:43,080 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 22:12:43,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-07-19 22:12:43,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9352369fa/4a15d38891004593bb880b649f259287/FLAGc64c1b9e0 [2022-07-19 22:12:43,713 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 22:12:43,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-07-19 22:12:43,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9352369fa/4a15d38891004593bb880b649f259287/FLAGc64c1b9e0 [2022-07-19 22:12:44,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9352369fa/4a15d38891004593bb880b649f259287 [2022-07-19 22:12:44,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 22:12:44,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 22:12:44,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 22:12:44,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 22:12:44,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 22:12:44,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:12:44" (1/1) ... [2022-07-19 22:12:44,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa92ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44, skipping insertion in model container [2022-07-19 22:12:44,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:12:44" (1/1) ... [2022-07-19 22:12:44,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 22:12:44,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 22:12:44,365 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_linked_list_begin_harness.i[4495,4508] [2022-07-19 22:12:44,370 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_linked_list_begin_harness.i[4555,4568] [2022-07-19 22:12:44,820 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,820 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,821 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,821 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,823 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,832 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,832 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,833 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,834 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,835 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,835 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,836 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:44,836 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,014 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 22:12:45,015 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 22:12:45,015 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 22:12:45,016 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 22:12:45,017 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 22:12:45,017 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 22:12:45,018 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 22:12:45,018 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 22:12:45,018 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 22:12:45,019 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 22:12:45,099 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 22:12:45,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:12:45,169 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 22:12:45,186 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_linked_list_begin_harness.i[4495,4508] [2022-07-19 22:12:45,187 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_linked_list_begin_harness.i[4555,4568] [2022-07-19 22:12:45,216 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,226 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,227 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,228 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,229 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,234 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,241 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,242 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,243 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,244 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,247 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,248 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,248 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:12:45,284 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 22:12:45,285 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 22:12:45,286 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 22:12:45,286 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 22:12:45,290 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 22:12:45,292 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 22:12:45,292 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 22:12:45,293 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 22:12:45,293 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 22:12:45,293 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 22:12:45,317 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 22:12:45,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:12:45,480 INFO L208 MainTranslator]: Completed translation [2022-07-19 22:12:45,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45 WrapperNode [2022-07-19 22:12:45,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 22:12:45,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 22:12:45,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 22:12:45,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 22:12:45,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,576 INFO L137 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2022-07-19 22:12:45,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 22:12:45,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 22:12:45,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 22:12:45,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 22:12:45,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 22:12:45,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 22:12:45,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 22:12:45,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 22:12:45,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (1/1) ... [2022-07-19 22:12:45,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:12:45,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:45,656 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) [2022-07-19 22:12:45,679 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 [2022-07-19 22:12:45,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 22:12:45,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 22:12:45,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 22:12:45,690 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-07-19 22:12:45,690 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-07-19 22:12:45,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 22:12:45,690 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-07-19 22:12:45,691 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-07-19 22:12:45,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 22:12:45,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 22:12:45,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 22:12:45,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 22:12:45,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 22:12:45,692 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 22:12:45,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 22:12:45,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 22:12:45,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 22:12:45,693 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-07-19 22:12:45,693 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-07-19 22:12:45,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 22:12:45,893 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 22:12:45,894 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 22:12:46,097 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 22:12:46,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 22:12:46,105 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 22:12:46,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:12:46 BoogieIcfgContainer [2022-07-19 22:12:46,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 22:12:46,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 22:12:46,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 22:12:46,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 22:12:46,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:12:44" (1/3) ... [2022-07-19 22:12:46,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b54869c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:12:46, skipping insertion in model container [2022-07-19 22:12:46,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:45" (2/3) ... [2022-07-19 22:12:46,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b54869c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:12:46, skipping insertion in model container [2022-07-19 22:12:46,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:12:46" (3/3) ... [2022-07-19 22:12:46,112 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2022-07-19 22:12:46,121 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 22:12:46,122 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 22:12:46,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 22:12:46,162 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@63c55d15, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2dba16b2 [2022-07-19 22:12:46,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 22:12:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-19 22:12:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 22:12:46,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:46,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:46,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:46,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2022-07-19 22:12:46,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:46,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553438283] [2022-07-19 22:12:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:46,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 22:12:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 22:12:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:12:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 22:12:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 22:12:46,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:46,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553438283] [2022-07-19 22:12:46,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553438283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:46,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:12:46,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 22:12:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666849656] [2022-07-19 22:12:46,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:46,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 22:12:46,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 22:12:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 22:12:46,599 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:12:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:46,639 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2022-07-19 22:12:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 22:12:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-07-19 22:12:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:46,650 INFO L225 Difference]: With dead ends: 130 [2022-07-19 22:12:46,650 INFO L226 Difference]: Without dead ends: 64 [2022-07-19 22:12:46,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 22:12:46,660 INFO L413 NwaCegarLoop]: 88 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, 88 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 [2022-07-19 22:12:46,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 22:12:46,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-19 22:12:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-19 22:12:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 22:12:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-07-19 22:12:46,712 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2022-07-19 22:12:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:46,712 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-07-19 22:12:46,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:12:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-07-19 22:12:46,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 22:12:46,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:46,718 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:46,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 22:12:46,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2022-07-19 22:12:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:46,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959816373] [2022-07-19 22:12:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:46,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 22:12:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:46,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 22:12:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:47,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:12:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:47,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 22:12:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 22:12:47,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:47,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959816373] [2022-07-19 22:12:47,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959816373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962187223] [2022-07-19 22:12:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:47,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:47,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:47,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:47,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 22:12:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:47,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-19 22:12:47,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:47,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-19 22:12:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:47,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-19 22:12:47,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:47,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-07-19 22:12:47,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:47,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:47,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-07-19 22:12:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:12:47,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:47,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962187223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:47,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:47,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2022-07-19 22:12:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484641748] [2022-07-19 22:12:47,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:47,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 22:12:47,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 22:12:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-19 22:12:47,598 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 22:12:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:47,644 INFO L93 Difference]: Finished difference Result 132 states and 175 transitions. [2022-07-19 22:12:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:12:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2022-07-19 22:12:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:47,647 INFO L225 Difference]: With dead ends: 132 [2022-07-19 22:12:47,647 INFO L226 Difference]: Without dead ends: 80 [2022-07-19 22:12:47,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-19 22:12:47,652 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 16 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:47,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 362 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-07-19 22:12:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-19 22:12:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-07-19 22:12:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 61 states have internal predecessors, (78), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-19 22:12:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2022-07-19 22:12:47,673 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 68 [2022-07-19 22:12:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:47,673 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2022-07-19 22:12:47,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 22:12:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2022-07-19 22:12:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 22:12:47,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:47,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:47,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:47,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:47,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash -103300630, now seen corresponding path program 1 times [2022-07-19 22:12:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275133948] [2022-07-19 22:12:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:47,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:47,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:47,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:47,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 22:12:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:48,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 22:12:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:48,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:12:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:48,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 22:12:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 22:12:48,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:48,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275133948] [2022-07-19 22:12:48,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275133948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:48,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319847169] [2022-07-19 22:12:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:48,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:48,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:48,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:48,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 22:12:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 22:12:48,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:48,263 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-07-19 22:12:48,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-07-19 22:12:48,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-19 22:12:48,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-07-19 22:12:48,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 26 [2022-07-19 22:12:48,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-19 22:12:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:12:49,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:49,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319847169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:49,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:49,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2022-07-19 22:12:49,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070375510] [2022-07-19 22:12:49,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:49,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 22:12:49,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:49,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 22:12:49,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:12:49,547 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 22:12:49,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:49,689 INFO L93 Difference]: Finished difference Result 168 states and 222 transitions. [2022-07-19 22:12:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 22:12:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2022-07-19 22:12:49,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:49,694 INFO L225 Difference]: With dead ends: 168 [2022-07-19 22:12:49,694 INFO L226 Difference]: Without dead ends: 116 [2022-07-19 22:12:49,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-19 22:12:49,698 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 71 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:49,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 496 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 32 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-07-19 22:12:49,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-19 22:12:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 90. [2022-07-19 22:12:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 67 states have internal predecessors, (85), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-19 22:12:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2022-07-19 22:12:49,712 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 68 [2022-07-19 22:12:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:49,713 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2022-07-19 22:12:49,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 22:12:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2022-07-19 22:12:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 22:12:49,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:49,718 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:49,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:49,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 22:12:49,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1824972072, now seen corresponding path program 1 times [2022-07-19 22:12:49,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:49,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730244629] [2022-07-19 22:12:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:49,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:49,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:49,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:49,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:50,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 22:12:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:50,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 22:12:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:50,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:12:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:50,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 22:12:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 22:12:50,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730244629] [2022-07-19 22:12:50,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730244629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632601304] [2022-07-19 22:12:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:50,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:50,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:50,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:50,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 22:12:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:50,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 22:12:50,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:50,199 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:12:50,199 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-19 22:12:50,208 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:12:50,208 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-19 22:12:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:12:50,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:12:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:12:51,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632601304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:12:51,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:12:51,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 12] total 28 [2022-07-19 22:12:51,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830940193] [2022-07-19 22:12:51,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:12:51,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 22:12:51,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:51,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 22:12:51,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-07-19 22:12:51,061 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-19 22:12:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:52,429 INFO L93 Difference]: Finished difference Result 261 states and 413 transitions. [2022-07-19 22:12:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 22:12:52,430 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 68 [2022-07-19 22:12:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:52,432 INFO L225 Difference]: With dead ends: 261 [2022-07-19 22:12:52,432 INFO L226 Difference]: Without dead ends: 192 [2022-07-19 22:12:52,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=430, Invalid=2876, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 22:12:52,434 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 240 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:52,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1505 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1019 Invalid, 0 Unknown, 317 Unchecked, 0.6s Time] [2022-07-19 22:12:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-19 22:12:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 167. [2022-07-19 22:12:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 120 states have (on average 1.325) internal successors, (159), 124 states have internal predecessors, (159), 33 states have call successors, (33), 11 states have call predecessors, (33), 13 states have return successors, (71), 31 states have call predecessors, (71), 32 states have call successors, (71) [2022-07-19 22:12:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 263 transitions. [2022-07-19 22:12:52,485 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 263 transitions. Word has length 68 [2022-07-19 22:12:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:52,485 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 263 transitions. [2022-07-19 22:12:52,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-19 22:12:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 263 transitions. [2022-07-19 22:12:52,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 22:12:52,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:52,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:52,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:52,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:52,701 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2022-07-19 22:12:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:52,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055657411] [2022-07-19 22:12:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:52,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:52,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:52,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:52,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:52,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 22:12:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:52,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 22:12:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:52,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 22:12:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:52,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 22:12:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:12:52,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055657411] [2022-07-19 22:12:52,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055657411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385360425] [2022-07-19 22:12:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:52,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:52,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:52,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:52,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 22:12:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:52,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 22:12:52,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:12:52,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:52,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385360425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:52,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:52,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-07-19 22:12:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113013043] [2022-07-19 22:12:52,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:52,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:12:52,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:12:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:12:52,981 INFO L87 Difference]: Start difference. First operand 167 states and 263 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:12:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:53,104 INFO L93 Difference]: Finished difference Result 308 states and 509 transitions. [2022-07-19 22:12:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:12:53,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-07-19 22:12:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:53,107 INFO L225 Difference]: With dead ends: 308 [2022-07-19 22:12:53,107 INFO L226 Difference]: Without dead ends: 176 [2022-07-19 22:12:53,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:12:53,108 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 107 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:53,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 243 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:12:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-19 22:12:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-07-19 22:12:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 126 states have (on average 1.3095238095238095) internal successors, (165), 133 states have internal predecessors, (165), 33 states have call successors, (33), 11 states have call predecessors, (33), 16 states have return successors, (88), 31 states have call predecessors, (88), 32 states have call successors, (88) [2022-07-19 22:12:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 286 transitions. [2022-07-19 22:12:53,126 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 286 transitions. Word has length 70 [2022-07-19 22:12:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:53,126 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 286 transitions. [2022-07-19 22:12:53,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:12:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 286 transitions. [2022-07-19 22:12:53,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 22:12:53,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:53,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:53,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:53,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:53,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2022-07-19 22:12:53,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:53,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470975760] [2022-07-19 22:12:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:53,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:53,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:53,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:53,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 22:12:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:53,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 22:12:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:53,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:12:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:53,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 22:12:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-19 22:12:53,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:53,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470975760] [2022-07-19 22:12:53,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470975760] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:53,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647633329] [2022-07-19 22:12:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:53,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:53,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:53,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:53,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 22:12:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:53,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 22:12:53,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:12:53,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:53,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647633329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:53,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:53,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2022-07-19 22:12:53,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381677442] [2022-07-19 22:12:53,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:53,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 22:12:53,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:53,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 22:12:53,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:12:53,608 INFO L87 Difference]: Start difference. First operand 176 states and 286 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:12:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:53,779 INFO L93 Difference]: Finished difference Result 353 states and 619 transitions. [2022-07-19 22:12:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:12:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-07-19 22:12:53,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:53,782 INFO L225 Difference]: With dead ends: 353 [2022-07-19 22:12:53,782 INFO L226 Difference]: Without dead ends: 212 [2022-07-19 22:12:53,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:12:53,784 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 144 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:53,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 284 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:12:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-19 22:12:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 182. [2022-07-19 22:12:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 139 states have internal predecessors, (174), 33 states have call successors, (33), 11 states have call predecessors, (33), 16 states have return successors, (88), 31 states have call predecessors, (88), 32 states have call successors, (88) [2022-07-19 22:12:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 295 transitions. [2022-07-19 22:12:53,801 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 295 transitions. Word has length 72 [2022-07-19 22:12:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:53,802 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 295 transitions. [2022-07-19 22:12:53,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:12:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 295 transitions. [2022-07-19 22:12:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-19 22:12:53,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:53,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:53,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:54,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:54,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:54,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2022-07-19 22:12:54,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:54,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078662438] [2022-07-19 22:12:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:54,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 22:12:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 22:12:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 22:12:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-19 22:12:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-19 22:12:54,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:54,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078662438] [2022-07-19 22:12:54,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078662438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:54,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230206893] [2022-07-19 22:12:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:54,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:54,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:54,103 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:54,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 22:12:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 22:12:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 22:12:54,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:54,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230206893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:54,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:54,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 22:12:54,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641338695] [2022-07-19 22:12:54,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:54,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 22:12:54,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 22:12:54,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:12:54,225 INFO L87 Difference]: Start difference. First operand 182 states and 295 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:12:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:54,242 INFO L93 Difference]: Finished difference Result 356 states and 642 transitions. [2022-07-19 22:12:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 22:12:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-07-19 22:12:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:54,244 INFO L225 Difference]: With dead ends: 356 [2022-07-19 22:12:54,244 INFO L226 Difference]: Without dead ends: 209 [2022-07-19 22:12:54,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:12:54,245 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:54,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 162 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 22:12:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-19 22:12:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 185. [2022-07-19 22:12:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 135 states have (on average 1.3111111111111111) internal successors, (177), 142 states have internal predecessors, (177), 33 states have call successors, (33), 11 states have call predecessors, (33), 16 states have return successors, (88), 31 states have call predecessors, (88), 32 states have call successors, (88) [2022-07-19 22:12:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 298 transitions. [2022-07-19 22:12:54,258 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 298 transitions. Word has length 73 [2022-07-19 22:12:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:54,259 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 298 transitions. [2022-07-19 22:12:54,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:12:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 298 transitions. [2022-07-19 22:12:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 22:12:54,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:54,260 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:54,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:54,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:54,480 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash 137287748, now seen corresponding path program 1 times [2022-07-19 22:12:54,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:54,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475546490] [2022-07-19 22:12:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:54,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:12:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:12:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:12:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:12:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 22:12:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 22:12:54,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:54,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475546490] [2022-07-19 22:12:54,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475546490] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:54,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441947628] [2022-07-19 22:12:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:54,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:54,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:54,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:54,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 22:12:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 22:12:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:54,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:54,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-19 22:12:54,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:54,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-19 22:12:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:54,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:54,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:54,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-07-19 22:12:54,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:54,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:54,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:54,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-07-19 22:12:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 22:12:55,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:55,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441947628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:55,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:55,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2022-07-19 22:12:55,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829131508] [2022-07-19 22:12:55,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:55,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 22:12:55,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 22:12:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:12:55,437 INFO L87 Difference]: Start difference. First operand 185 states and 298 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:12:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:55,572 INFO L93 Difference]: Finished difference Result 425 states and 697 transitions. [2022-07-19 22:12:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 22:12:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 81 [2022-07-19 22:12:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:55,575 INFO L225 Difference]: With dead ends: 425 [2022-07-19 22:12:55,575 INFO L226 Difference]: Without dead ends: 321 [2022-07-19 22:12:55,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-07-19 22:12:55,576 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 32 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:55,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 504 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-07-19 22:12:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-19 22:12:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 289. [2022-07-19 22:12:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 214 states have (on average 1.3317757009345794) internal successors, (285), 227 states have internal predecessors, (285), 46 states have call successors, (46), 17 states have call predecessors, (46), 28 states have return successors, (140), 44 states have call predecessors, (140), 45 states have call successors, (140) [2022-07-19 22:12:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 471 transitions. [2022-07-19 22:12:55,593 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 471 transitions. Word has length 81 [2022-07-19 22:12:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:55,593 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 471 transitions. [2022-07-19 22:12:55,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:12:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 471 transitions. [2022-07-19 22:12:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 22:12:55,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:55,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:55,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:55,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:55,813 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash -672058878, now seen corresponding path program 1 times [2022-07-19 22:12:55,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:55,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393266053] [2022-07-19 22:12:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:55,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:55,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:55,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:55,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:12:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:12:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:55,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:12:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:55,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:12:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:55,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 22:12:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 22:12:55,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393266053] [2022-07-19 22:12:55,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393266053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638829426] [2022-07-19 22:12:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:55,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:55,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:55,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:56,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 22:12:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:56,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 22:12:56,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:56,212 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-07-19 22:12:56,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-07-19 22:12:56,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-19 22:12:56,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-07-19 22:12:56,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-07-19 22:12:56,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-19 22:12:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 22:12:56,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:56,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638829426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:56,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:56,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2022-07-19 22:12:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685364354] [2022-07-19 22:12:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:56,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 22:12:56,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 22:12:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-07-19 22:12:56,776 INFO L87 Difference]: Start difference. First operand 289 states and 471 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:12:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:56,929 INFO L93 Difference]: Finished difference Result 456 states and 733 transitions. [2022-07-19 22:12:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 22:12:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 81 [2022-07-19 22:12:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:56,932 INFO L225 Difference]: With dead ends: 456 [2022-07-19 22:12:56,932 INFO L226 Difference]: Without dead ends: 366 [2022-07-19 22:12:56,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-07-19 22:12:56,933 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 120 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:56,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 525 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 58 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-07-19 22:12:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-07-19 22:12:56,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 347. [2022-07-19 22:12:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 257 states have (on average 1.3307392996108949) internal successors, (342), 269 states have internal predecessors, (342), 58 states have call successors, (58), 21 states have call predecessors, (58), 31 states have return successors, (184), 56 states have call predecessors, (184), 56 states have call successors, (184) [2022-07-19 22:12:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 584 transitions. [2022-07-19 22:12:56,958 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 584 transitions. Word has length 81 [2022-07-19 22:12:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:56,959 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 584 transitions. [2022-07-19 22:12:56,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:12:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 584 transitions. [2022-07-19 22:12:56,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 22:12:56,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:56,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:56,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 22:12:57,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 22:12:57,178 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:57,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1065085888, now seen corresponding path program 1 times [2022-07-19 22:12:57,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:57,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420069423] [2022-07-19 22:12:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:57,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:12:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:12:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:12:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:12:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 22:12:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 22:12:57,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:57,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420069423] [2022-07-19 22:12:57,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420069423] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:57,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275069266] [2022-07-19 22:12:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:57,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:57,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:57,284 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:57,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 22:12:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:57,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-19 22:12:57,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:57,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-19 22:12:57,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:57,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-19 22:12:57,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:57,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-07-19 22:12:57,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:57,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:57,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 22:12:57,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-07-19 22:12:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 22:12:57,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:57,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275069266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:57,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:57,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2022-07-19 22:12:57,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43924465] [2022-07-19 22:12:57,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:57,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 22:12:57,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 22:12:57,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:12:57,815 INFO L87 Difference]: Start difference. First operand 347 states and 584 transitions. Second operand has 10 states, 9 states have (on average 7.111111111111111) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:12:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:57,865 INFO L93 Difference]: Finished difference Result 632 states and 970 transitions. [2022-07-19 22:12:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 22:12:57,866 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.111111111111111) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 81 [2022-07-19 22:12:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:57,868 INFO L225 Difference]: With dead ends: 632 [2022-07-19 22:12:57,868 INFO L226 Difference]: Without dead ends: 422 [2022-07-19 22:12:57,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:12:57,870 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 23 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:57,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 350 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 47 Unchecked, 0.0s Time] [2022-07-19 22:12:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-07-19 22:12:57,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 391. [2022-07-19 22:12:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 297 states have (on average 1.3367003367003367) internal successors, (397), 307 states have internal predecessors, (397), 61 states have call successors, (61), 24 states have call predecessors, (61), 32 states have return successors, (172), 59 states have call predecessors, (172), 59 states have call successors, (172) [2022-07-19 22:12:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 630 transitions. [2022-07-19 22:12:57,891 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 630 transitions. Word has length 81 [2022-07-19 22:12:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:57,891 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 630 transitions. [2022-07-19 22:12:57,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.111111111111111) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:12:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 630 transitions. [2022-07-19 22:12:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 22:12:57,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:57,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:57,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:58,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 22:12:58,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:58,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1003046274, now seen corresponding path program 2 times [2022-07-19 22:12:58,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:58,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727573483] [2022-07-19 22:12:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:58,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:58,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:58,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:58,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:58,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:12:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:58,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:12:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:58,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:12:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:58,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:12:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:58,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 22:12:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 22:12:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:58,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727573483] [2022-07-19 22:12:58,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727573483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:58,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556071279] [2022-07-19 22:12:58,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 22:12:58,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:58,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:58,197 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:58,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 22:12:58,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 22:12:58,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 22:12:58,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 22:12:58,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:58,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-19 22:12:58,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 22:12:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 22:12:58,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:58,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556071279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:58,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:58,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2022-07-19 22:12:58,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200145682] [2022-07-19 22:12:58,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:58,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 22:12:58,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:58,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 22:12:58,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:12:58,732 INFO L87 Difference]: Start difference. First operand 391 states and 630 transitions. Second operand has 11 states, 10 states have (on average 6.4) internal successors, (64), 11 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:12:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:58,835 INFO L93 Difference]: Finished difference Result 555 states and 852 transitions. [2022-07-19 22:12:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 22:12:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.4) internal successors, (64), 11 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 81 [2022-07-19 22:12:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:58,838 INFO L225 Difference]: With dead ends: 555 [2022-07-19 22:12:58,838 INFO L226 Difference]: Without dead ends: 402 [2022-07-19 22:12:58,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-07-19 22:12:58,839 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 48 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:58,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 665 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-07-19 22:12:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-19 22:12:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 391. [2022-07-19 22:12:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 297 states have (on average 1.32996632996633) internal successors, (395), 307 states have internal predecessors, (395), 61 states have call successors, (61), 24 states have call predecessors, (61), 32 states have return successors, (172), 59 states have call predecessors, (172), 59 states have call successors, (172) [2022-07-19 22:12:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 628 transitions. [2022-07-19 22:12:58,859 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 628 transitions. Word has length 81 [2022-07-19 22:12:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:58,860 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 628 transitions. [2022-07-19 22:12:58,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.4) internal successors, (64), 11 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 22:12:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 628 transitions. [2022-07-19 22:12:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 22:12:58,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:58,862 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:58,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:59,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 22:12:59,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1512519364, now seen corresponding path program 3 times [2022-07-19 22:12:59,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:59,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684680745] [2022-07-19 22:12:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:59,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:12:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:12:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:12:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:12:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 22:12:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 22:12:59,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:59,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684680745] [2022-07-19 22:12:59,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684680745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:59,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029709744] [2022-07-19 22:12:59,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 22:12:59,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:59,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:59,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:59,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 22:12:59,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 22:12:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 22:12:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 22:12:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:12:59,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:59,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029709744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:59,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:59,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2022-07-19 22:12:59,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375838155] [2022-07-19 22:12:59,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:59,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 22:12:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:59,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 22:12:59,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 22:12:59,333 INFO L87 Difference]: Start difference. First operand 391 states and 628 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:12:59,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:12:59,377 INFO L93 Difference]: Finished difference Result 629 states and 1019 transitions. [2022-07-19 22:12:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 22:12:59,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-07-19 22:12:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:12:59,379 INFO L225 Difference]: With dead ends: 629 [2022-07-19 22:12:59,379 INFO L226 Difference]: Without dead ends: 393 [2022-07-19 22:12:59,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:12:59,382 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:12:59,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 380 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 22:12:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-19 22:12:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 375. [2022-07-19 22:12:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 282 states have (on average 1.3191489361702127) internal successors, (372), 292 states have internal predecessors, (372), 61 states have call successors, (61), 23 states have call predecessors, (61), 31 states have return successors, (150), 59 states have call predecessors, (150), 59 states have call successors, (150) [2022-07-19 22:12:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 583 transitions. [2022-07-19 22:12:59,402 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 583 transitions. Word has length 81 [2022-07-19 22:12:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:12:59,403 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 583 transitions. [2022-07-19 22:12:59,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:12:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 583 transitions. [2022-07-19 22:12:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 22:12:59,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:12:59,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:12:59,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 22:12:59,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 22:12:59,636 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:12:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:12:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash -785480932, now seen corresponding path program 1 times [2022-07-19 22:12:59,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:12:59,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405468223] [2022-07-19 22:12:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:12:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:12:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:12:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:12:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:12:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:12:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:12:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 22:12:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 22:12:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:12:59,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:12:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405468223] [2022-07-19 22:12:59,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405468223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:12:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578971811] [2022-07-19 22:12:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:12:59,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:12:59,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:12:59,765 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:12:59,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 22:12:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:12:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 22:12:59,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:12:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:12:59,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:12:59,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578971811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:12:59,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:12:59,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2022-07-19 22:12:59,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957292328] [2022-07-19 22:12:59,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:12:59,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 22:12:59,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:12:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 22:12:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-07-19 22:12:59,978 INFO L87 Difference]: Start difference. First operand 375 states and 583 transitions. Second operand has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:13:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:00,128 INFO L93 Difference]: Finished difference Result 643 states and 1015 transitions. [2022-07-19 22:13:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 22:13:00,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2022-07-19 22:13:00,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:00,130 INFO L225 Difference]: With dead ends: 643 [2022-07-19 22:13:00,130 INFO L226 Difference]: Without dead ends: 377 [2022-07-19 22:13:00,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-07-19 22:13:00,132 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 112 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:00,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 283 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:13:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-19 22:13:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2022-07-19 22:13:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 282 states have (on average 1.2872340425531914) internal successors, (363), 292 states have internal predecessors, (363), 61 states have call successors, (61), 23 states have call predecessors, (61), 31 states have return successors, (150), 59 states have call predecessors, (150), 59 states have call successors, (150) [2022-07-19 22:13:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 574 transitions. [2022-07-19 22:13:00,151 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 574 transitions. Word has length 83 [2022-07-19 22:13:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:00,152 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 574 transitions. [2022-07-19 22:13:00,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:13:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 574 transitions. [2022-07-19 22:13:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-19 22:13:00,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:00,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:13:00,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:00,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 22:13:00,371 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1540031657, now seen corresponding path program 1 times [2022-07-19 22:13:00,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:00,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914907152] [2022-07-19 22:13:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:00,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:13:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:13:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 22:13:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 22:13:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 22:13:00,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:00,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914907152] [2022-07-19 22:13:00,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914907152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:00,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526822645] [2022-07-19 22:13:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:00,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:00,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:00,530 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:00,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 22:13:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:00,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 22:13:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:13:00,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:13:00,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526822645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:13:00,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:13:00,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-07-19 22:13:00,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438950618] [2022-07-19 22:13:00,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:13:00,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 22:13:00,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 22:13:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-07-19 22:13:00,765 INFO L87 Difference]: Start difference. First operand 375 states and 574 transitions. Second operand has 9 states, 8 states have (on average 8.125) internal successors, (65), 9 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:13:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:00,958 INFO L93 Difference]: Finished difference Result 643 states and 1032 transitions. [2022-07-19 22:13:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 22:13:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 9 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 85 [2022-07-19 22:13:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:00,961 INFO L225 Difference]: With dead ends: 643 [2022-07-19 22:13:00,961 INFO L226 Difference]: Without dead ends: 369 [2022-07-19 22:13:00,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-19 22:13:00,963 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 137 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:00,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 319 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:13:00,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-19 22:13:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 343. [2022-07-19 22:13:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 256 states have (on average 1.28125) internal successors, (328), 260 states have internal predecessors, (328), 61 states have call successors, (61), 23 states have call predecessors, (61), 25 states have return successors, (121), 59 states have call predecessors, (121), 59 states have call successors, (121) [2022-07-19 22:13:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 510 transitions. [2022-07-19 22:13:00,981 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 510 transitions. Word has length 85 [2022-07-19 22:13:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:00,982 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 510 transitions. [2022-07-19 22:13:00,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.125) internal successors, (65), 9 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 22:13:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 510 transitions. [2022-07-19 22:13:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-19 22:13:00,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:00,983 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:13:01,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:01,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 22:13:01,199 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash -629413664, now seen corresponding path program 4 times [2022-07-19 22:13:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016379001] [2022-07-19 22:13:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:01,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 22:13:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:13:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 22:13:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 22:13:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-19 22:13:01,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:01,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016379001] [2022-07-19 22:13:01,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016379001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:01,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346239762] [2022-07-19 22:13:01,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 22:13:01,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:01,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:01,321 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:01,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 22:13:01,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 22:13:01,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 22:13:01,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 22:13:01,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:01,516 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:13:01,516 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-19 22:13:01,525 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:13:01,525 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-19 22:13:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 48 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:13:02,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:13:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 22:13:02,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346239762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:13:02,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:13:02,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16, 11] total 29 [2022-07-19 22:13:02,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253152650] [2022-07-19 22:13:02,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:13:02,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 22:13:02,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:02,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 22:13:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-07-19 22:13:02,439 INFO L87 Difference]: Start difference. First operand 343 states and 510 transitions. Second operand has 29 states, 27 states have (on average 3.962962962962963) internal successors, (107), 28 states have internal predecessors, (107), 9 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-19 22:13:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:03,748 INFO L93 Difference]: Finished difference Result 701 states and 1158 transitions. [2022-07-19 22:13:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 22:13:03,749 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.962962962962963) internal successors, (107), 28 states have internal predecessors, (107), 9 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 94 [2022-07-19 22:13:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:03,751 INFO L225 Difference]: With dead ends: 701 [2022-07-19 22:13:03,752 INFO L226 Difference]: Without dead ends: 370 [2022-07-19 22:13:03,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=428, Invalid=2994, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 22:13:03,754 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 253 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:03,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1545 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1233 Invalid, 0 Unknown, 326 Unchecked, 0.7s Time] [2022-07-19 22:13:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-07-19 22:13:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 323. [2022-07-19 22:13:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 242 states have (on average 1.2685950413223142) internal successors, (307), 248 states have internal predecessors, (307), 54 states have call successors, (54), 22 states have call predecessors, (54), 26 states have return successors, (184), 52 states have call predecessors, (184), 52 states have call successors, (184) [2022-07-19 22:13:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 545 transitions. [2022-07-19 22:13:03,798 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 545 transitions. Word has length 94 [2022-07-19 22:13:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:03,798 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 545 transitions. [2022-07-19 22:13:03,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.962962962962963) internal successors, (107), 28 states have internal predecessors, (107), 9 states have call successors, (22), 4 states have call predecessors, (22), 8 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-19 22:13:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 545 transitions. [2022-07-19 22:13:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-19 22:13:03,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:03,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 22:13:03,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:04,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:04,013 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:04,013 INFO L85 PathProgramCache]: Analyzing trace with hash -959329865, now seen corresponding path program 1 times [2022-07-19 22:13:04,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:04,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956339434] [2022-07-19 22:13:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:04,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:13:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:13:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-19 22:13:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-19 22:13:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 22:13:04,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:04,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956339434] [2022-07-19 22:13:04,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956339434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:04,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145444375] [2022-07-19 22:13:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:04,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:04,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:04,151 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:04,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 22:13:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:04,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 22:13:04,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:04,339 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:13:04,339 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-19 22:13:04,347 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:13:04,347 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-19 22:13:05,197 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2022-07-19 22:13:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 22:13:05,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:13:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 22:13:05,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145444375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:13:05,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:13:05,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 18 [2022-07-19 22:13:05,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201704689] [2022-07-19 22:13:05,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:13:05,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 22:13:05,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 22:13:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2022-07-19 22:13:05,337 INFO L87 Difference]: Start difference. First operand 323 states and 545 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 6 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-19 22:13:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:05,825 INFO L93 Difference]: Finished difference Result 785 states and 1582 transitions. [2022-07-19 22:13:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 22:13:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 6 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 96 [2022-07-19 22:13:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:05,830 INFO L225 Difference]: With dead ends: 785 [2022-07-19 22:13:05,830 INFO L226 Difference]: Without dead ends: 532 [2022-07-19 22:13:05,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=445, Unknown=1, NotChecked=44, Total=600 [2022-07-19 22:13:05,833 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 169 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:05,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 673 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 528 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2022-07-19 22:13:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-19 22:13:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 386. [2022-07-19 22:13:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 295 states have (on average 1.2813559322033898) internal successors, (378), 302 states have internal predecessors, (378), 59 states have call successors, (59), 26 states have call predecessors, (59), 31 states have return successors, (203), 57 states have call predecessors, (203), 57 states have call successors, (203) [2022-07-19 22:13:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 640 transitions. [2022-07-19 22:13:05,880 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 640 transitions. Word has length 96 [2022-07-19 22:13:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:05,881 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 640 transitions. [2022-07-19 22:13:05,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 6 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-19 22:13:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 640 transitions. [2022-07-19 22:13:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-19 22:13:05,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:05,883 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 22:13:05,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:06,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 22:13:06,095 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1258300533, now seen corresponding path program 1 times [2022-07-19 22:13:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:06,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710615598] [2022-07-19 22:13:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:06,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:13:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:13:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-19 22:13:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-19 22:13:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 22:13:06,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:06,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710615598] [2022-07-19 22:13:06,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710615598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:06,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540377621] [2022-07-19 22:13:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:06,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:06,167 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:06,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 22:13:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 22:13:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 22:13:06,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:13:06,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540377621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:13:06,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:13:06,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-07-19 22:13:06,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456588877] [2022-07-19 22:13:06,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:13:06,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:13:06,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:13:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:13:06,359 INFO L87 Difference]: Start difference. First operand 386 states and 640 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:13:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:06,394 INFO L93 Difference]: Finished difference Result 631 states and 1065 transitions. [2022-07-19 22:13:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:13:06,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2022-07-19 22:13:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:06,397 INFO L225 Difference]: With dead ends: 631 [2022-07-19 22:13:06,397 INFO L226 Difference]: Without dead ends: 370 [2022-07-19 22:13:06,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:13:06,399 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:06,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 244 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 22:13:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-07-19 22:13:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 365. [2022-07-19 22:13:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 276 states have (on average 1.2717391304347827) internal successors, (351), 283 states have internal predecessors, (351), 58 states have call successors, (58), 25 states have call predecessors, (58), 30 states have return successors, (201), 56 states have call predecessors, (201), 56 states have call successors, (201) [2022-07-19 22:13:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 610 transitions. [2022-07-19 22:13:06,421 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 610 transitions. Word has length 96 [2022-07-19 22:13:06,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:06,421 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 610 transitions. [2022-07-19 22:13:06,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:13:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 610 transitions. [2022-07-19 22:13:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-19 22:13:06,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:06,423 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:13:06,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:06,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 22:13:06,643 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:06,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2145523379, now seen corresponding path program 1 times [2022-07-19 22:13:06,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:06,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583906366] [2022-07-19 22:13:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:06,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:13:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 22:13:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-19 22:13:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-19 22:13:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 22:13:06,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583906366] [2022-07-19 22:13:06,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583906366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:06,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131594029] [2022-07-19 22:13:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:06,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:06,794 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:06,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 22:13:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:06,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 22:13:06,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 22:13:06,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:13:06,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131594029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:13:06,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:13:06,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-07-19 22:13:06,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618274806] [2022-07-19 22:13:06,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:13:06,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:13:06,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:06,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:13:06,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:13:06,965 INFO L87 Difference]: Start difference. First operand 365 states and 610 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:13:06,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:06,983 INFO L93 Difference]: Finished difference Result 514 states and 865 transitions. [2022-07-19 22:13:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:13:06,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2022-07-19 22:13:06,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:06,985 INFO L225 Difference]: With dead ends: 514 [2022-07-19 22:13:06,985 INFO L226 Difference]: Without dead ends: 171 [2022-07-19 22:13:06,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-19 22:13:06,989 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:06,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 22:13:06,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-19 22:13:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 131. [2022-07-19 22:13:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 104 states have internal predecessors, (122), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (23), 15 states have call predecessors, (23), 16 states have call successors, (23) [2022-07-19 22:13:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2022-07-19 22:13:06,996 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 96 [2022-07-19 22:13:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:06,996 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2022-07-19 22:13:06,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:13:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2022-07-19 22:13:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-19 22:13:06,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:06,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 22:13:07,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:07,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 22:13:07,216 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2465506, now seen corresponding path program 1 times [2022-07-19 22:13:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:07,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351254885] [2022-07-19 22:13:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:07,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:13:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:13:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 22:13:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-19 22:13:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 22:13:07,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351254885] [2022-07-19 22:13:07,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351254885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948883669] [2022-07-19 22:13:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:07,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:07,364 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:07,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 22:13:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:07,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 22:13:07,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 22:13:07,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:13:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 22:13:07,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948883669] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:13:07,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:13:07,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 7] total 18 [2022-07-19 22:13:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902886979] [2022-07-19 22:13:07,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:13:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 22:13:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 22:13:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-19 22:13:07,763 INFO L87 Difference]: Start difference. First operand 131 states and 162 transitions. Second operand has 18 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-19 22:13:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:07,909 INFO L93 Difference]: Finished difference Result 218 states and 277 transitions. [2022-07-19 22:13:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 22:13:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2022-07-19 22:13:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:07,911 INFO L225 Difference]: With dead ends: 218 [2022-07-19 22:13:07,911 INFO L226 Difference]: Without dead ends: 142 [2022-07-19 22:13:07,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-07-19 22:13:07,912 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 13 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:07,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1045 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:13:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-19 22:13:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2022-07-19 22:13:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 100 states have (on average 1.21) internal successors, (121), 102 states have internal predecessors, (121), 17 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2022-07-19 22:13:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 158 transitions. [2022-07-19 22:13:07,922 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 158 transitions. Word has length 97 [2022-07-19 22:13:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:07,922 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 158 transitions. [2022-07-19 22:13:07,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-19 22:13:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 158 transitions. [2022-07-19 22:13:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-19 22:13:07,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:07,923 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:13:07,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:08,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:08,142 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash -596272544, now seen corresponding path program 1 times [2022-07-19 22:13:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912630600] [2022-07-19 22:13:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:13:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:13:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 22:13:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 22:13:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 22:13:08,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:08,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912630600] [2022-07-19 22:13:08,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912630600] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:08,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920787241] [2022-07-19 22:13:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:08,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:08,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:08,442 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:08,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 22:13:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 22:13:08,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:08,659 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:13:08,659 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-19 22:13:08,670 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:13:08,670 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-19 22:13:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 22:13:09,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:13:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 22:13:09,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920787241] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:13:09,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:13:09,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 24 [2022-07-19 22:13:09,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796080146] [2022-07-19 22:13:09,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:13:09,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 22:13:09,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:09,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 22:13:09,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-07-19 22:13:09,581 INFO L87 Difference]: Start difference. First operand 129 states and 158 transitions. Second operand has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 22 states have internal predecessors, (149), 11 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2022-07-19 22:13:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:10,041 INFO L93 Difference]: Finished difference Result 263 states and 328 transitions. [2022-07-19 22:13:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 22:13:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 22 states have internal predecessors, (149), 11 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) Word has length 100 [2022-07-19 22:13:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:10,043 INFO L225 Difference]: With dead ends: 263 [2022-07-19 22:13:10,043 INFO L226 Difference]: Without dead ends: 193 [2022-07-19 22:13:10,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 22:13:10,044 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 104 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:10,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 944 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 393 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-07-19 22:13:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-19 22:13:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 162. [2022-07-19 22:13:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 128 states have (on average 1.234375) internal successors, (158), 132 states have internal predecessors, (158), 18 states have call successors, (18), 13 states have call predecessors, (18), 15 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2022-07-19 22:13:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 199 transitions. [2022-07-19 22:13:10,056 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 199 transitions. Word has length 100 [2022-07-19 22:13:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:10,057 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 199 transitions. [2022-07-19 22:13:10,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.208333333333333) internal successors, (149), 22 states have internal predecessors, (149), 11 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (22), 11 states have call predecessors, (22), 10 states have call successors, (22) [2022-07-19 22:13:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 199 transitions. [2022-07-19 22:13:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-19 22:13:10,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:10,058 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:13:10,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:10,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:10,271 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:10,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1405619170, now seen corresponding path program 1 times [2022-07-19 22:13:10,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:10,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272894875] [2022-07-19 22:13:10,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:10,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:13:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:13:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 22:13:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 22:13:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-19 22:13:10,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:10,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272894875] [2022-07-19 22:13:10,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272894875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:10,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837788582] [2022-07-19 22:13:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:10,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:10,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:10,528 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:10,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 22:13:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-19 22:13:10,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:10,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-19 22:13:10,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 22:13:10,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 22:13:11,202 INFO L390 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 9 treesize of output 5 [2022-07-19 22:13:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 22:13:12,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:13:12,599 INFO L390 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 138 treesize of output 130 [2022-07-19 22:13:12,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-19 22:13:12,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-19 22:13:12,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-19 22:13:12,620 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:13:12,621 INFO L390 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 237 treesize of output 233 [2022-07-19 22:13:12,628 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 22:13:12,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 273 [2022-07-19 22:13:12,635 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 22:13:12,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 267 [2022-07-19 22:13:12,702 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 22:13:12,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 102 [2022-07-19 22:13:12,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 22:13:12,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 22:13:12,723 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-19 22:13:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 22:13:12,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837788582] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:13:12,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:13:12,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 17] total 41 [2022-07-19 22:13:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871561863] [2022-07-19 22:13:12,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:13:12,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 22:13:12,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:12,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 22:13:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 22:13:12,846 INFO L87 Difference]: Start difference. First operand 162 states and 199 transitions. Second operand has 41 states, 41 states have (on average 3.951219512195122) internal successors, (162), 39 states have internal predecessors, (162), 16 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 15 states have call successors, (22) [2022-07-19 22:13:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:14,264 INFO L93 Difference]: Finished difference Result 370 states and 473 transitions. [2022-07-19 22:13:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 22:13:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.951219512195122) internal successors, (162), 39 states have internal predecessors, (162), 16 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 15 states have call successors, (22) Word has length 100 [2022-07-19 22:13:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:14,266 INFO L225 Difference]: With dead ends: 370 [2022-07-19 22:13:14,266 INFO L226 Difference]: Without dead ends: 302 [2022-07-19 22:13:14,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 200 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=507, Invalid=4749, Unknown=0, NotChecked=0, Total=5256 [2022-07-19 22:13:14,267 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 182 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:14,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1998 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 919 Invalid, 0 Unknown, 600 Unchecked, 0.6s Time] [2022-07-19 22:13:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-19 22:13:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 265. [2022-07-19 22:13:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 200 states have (on average 1.215) internal successors, (243), 208 states have internal predecessors, (243), 37 states have call successors, (37), 21 states have call predecessors, (37), 27 states have return successors, (56), 35 states have call predecessors, (56), 35 states have call successors, (56) [2022-07-19 22:13:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 336 transitions. [2022-07-19 22:13:14,284 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 336 transitions. Word has length 100 [2022-07-19 22:13:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:14,284 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 336 transitions. [2022-07-19 22:13:14,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.951219512195122) internal successors, (162), 39 states have internal predecessors, (162), 16 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 13 states have call predecessors, (22), 15 states have call successors, (22) [2022-07-19 22:13:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 336 transitions. [2022-07-19 22:13:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-19 22:13:14,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:14,285 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:13:14,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:14,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-19 22:13:14,499 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1540480742, now seen corresponding path program 1 times [2022-07-19 22:13:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:14,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846008924] [2022-07-19 22:13:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:14,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:13:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:13:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 22:13:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 22:13:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 22:13:14,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:14,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846008924] [2022-07-19 22:13:14,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846008924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:14,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974160342] [2022-07-19 22:13:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:14,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:14,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:14,713 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:14,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 22:13:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:14,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-19 22:13:14,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:14,934 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 22:13:14,934 INFO L390 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-19 22:13:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 22:13:15,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:13:15,779 INFO L390 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 121 treesize of output 113 [2022-07-19 22:13:15,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 109 [2022-07-19 22:13:15,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 101 [2022-07-19 22:13:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 22:13:15,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974160342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 22:13:15,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 22:13:15,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 34 [2022-07-19 22:13:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813429150] [2022-07-19 22:13:15,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 22:13:15,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 22:13:15,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:15,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 22:13:15,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 22:13:15,833 INFO L87 Difference]: Start difference. First operand 265 states and 336 transitions. Second operand has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 32 states have internal predecessors, (145), 14 states have call successors, (22), 3 states have call predecessors, (22), 7 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2022-07-19 22:13:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:16,602 INFO L93 Difference]: Finished difference Result 528 states and 688 transitions. [2022-07-19 22:13:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 22:13:16,603 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 32 states have internal predecessors, (145), 14 states have call successors, (22), 3 states have call predecessors, (22), 7 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) Word has length 100 [2022-07-19 22:13:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:16,604 INFO L225 Difference]: With dead ends: 528 [2022-07-19 22:13:16,605 INFO L226 Difference]: Without dead ends: 431 [2022-07-19 22:13:16,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 207 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=2522, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 22:13:16,606 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 259 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:16,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1946 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 887 Invalid, 0 Unknown, 288 Unchecked, 0.4s Time] [2022-07-19 22:13:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-07-19 22:13:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 330. [2022-07-19 22:13:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 252 states have (on average 1.2103174603174602) internal successors, (305), 262 states have internal predecessors, (305), 43 states have call successors, (43), 26 states have call predecessors, (43), 34 states have return successors, (65), 41 states have call predecessors, (65), 41 states have call successors, (65) [2022-07-19 22:13:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 413 transitions. [2022-07-19 22:13:16,630 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 413 transitions. Word has length 100 [2022-07-19 22:13:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:16,631 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 413 transitions. [2022-07-19 22:13:16,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 32 states have internal predecessors, (145), 14 states have call successors, (22), 3 states have call predecessors, (22), 7 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2022-07-19 22:13:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 413 transitions. [2022-07-19 22:13:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-19 22:13:16,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:16,632 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:13:16,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:16,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 22:13:16,845 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1743369304, now seen corresponding path program 1 times [2022-07-19 22:13:16,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:16,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100746981] [2022-07-19 22:13:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:16,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:13:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:13:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 22:13:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 22:13:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 22:13:16,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:16,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100746981] [2022-07-19 22:13:16,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100746981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:16,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405655362] [2022-07-19 22:13:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:16,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:16,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:16,993 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:16,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 22:13:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:17,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 22:13:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-19 22:13:17,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:13:17,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405655362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:13:17,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:13:17,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-07-19 22:13:17,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144545758] [2022-07-19 22:13:17,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:13:17,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:13:17,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:13:17,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:13:17,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:13:17,242 INFO L87 Difference]: Start difference. First operand 330 states and 413 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:13:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:13:17,348 INFO L93 Difference]: Finished difference Result 739 states and 952 transitions. [2022-07-19 22:13:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:13:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 100 [2022-07-19 22:13:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:13:17,350 INFO L225 Difference]: With dead ends: 739 [2022-07-19 22:13:17,350 INFO L226 Difference]: Without dead ends: 319 [2022-07-19 22:13:17,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-19 22:13:17,352 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 104 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:13:17,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 349 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 22:13:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-19 22:13:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-07-19 22:13:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 242 states have (on average 1.1900826446280992) internal successors, (288), 251 states have internal predecessors, (288), 43 states have call successors, (43), 26 states have call predecessors, (43), 33 states have return successors, (63), 41 states have call predecessors, (63), 41 states have call successors, (63) [2022-07-19 22:13:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 394 transitions. [2022-07-19 22:13:17,387 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 394 transitions. Word has length 100 [2022-07-19 22:13:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:13:17,388 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 394 transitions. [2022-07-19 22:13:17,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 22:13:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 394 transitions. [2022-07-19 22:13:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 22:13:17,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:13:17,389 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:13:17,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 22:13:17,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:17,607 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:13:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:13:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1063573994, now seen corresponding path program 1 times [2022-07-19 22:13:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:13:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939308022] [2022-07-19 22:13:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:17,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:13:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:17,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:13:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:17,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:13:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:17,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:13:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:17,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:17,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:13:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:17,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:13:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:17,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:18,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 22:13:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:18,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 22:13:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:18,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 22:13:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 22:13:18,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:13:18,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939308022] [2022-07-19 22:13:18,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939308022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:13:18,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889533277] [2022-07-19 22:13:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:13:18,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:13:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:13:18,191 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:13:18,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 22:13:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:13:18,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 139 conjunts are in the unsatisfiable core [2022-07-19 22:13:18,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:13:18,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-07-19 22:13:18,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 22:13:18,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-07-19 22:13:18,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 22:13:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 54 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:13:20,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 22:13:31,583 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 22:13:41,789 WARN L233 SmtUtils]: Spent 10.12s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 22:13:42,701 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:13:42,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 4698 treesize of output 4266 [2022-07-19 22:13:42,874 INFO L356 Elim1Store]: treesize reduction 23, result has 86.1 percent of original size [2022-07-19 22:13:42,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 47683 treesize of output 44458 [2022-07-19 22:13:43,268 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:13:43,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 48346 treesize of output 47908 [2022-07-19 22:13:43,789 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:13:43,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60481 treesize of output 57632 [2022-07-19 22:13:46,250 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:13:46,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53629 treesize of output 52028 [2022-07-19 22:13:46,785 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 22:13:46,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 51564 treesize of output 51375 [2022-07-19 22:14:11,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 22:14:11,828 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 22:14:11,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-07-19 22:14:11,873 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 22:14:11,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2022-07-19 22:14:11,906 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 22:14:11,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2022-07-19 22:14:11,916 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-19 22:14:11,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-19 22:14:12,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:14:12,117 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:137) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:346) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:269) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) 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) [2022-07-19 22:14:12,119 INFO L158 Benchmark]: Toolchain (without parser) took 87997.09ms. Allocated memory was 94.4MB in the beginning and 903.9MB in the end (delta: 809.5MB). Free memory was 69.6MB in the beginning and 791.8MB in the end (delta: -722.2MB). Peak memory consumption was 576.2MB. Max. memory is 16.1GB. [2022-07-19 22:14:12,119 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 22:14:12,120 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1357.51ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 69.6MB in the beginning and 86.0MB in the end (delta: -16.4MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2022-07-19 22:14:12,120 INFO L158 Benchmark]: Boogie Procedure Inliner took 95.54ms. Allocated memory is still 127.9MB. Free memory was 86.0MB in the beginning and 81.0MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-19 22:14:12,120 INFO L158 Benchmark]: Boogie Preprocessor took 34.39ms. Allocated memory is still 127.9MB. Free memory was 81.0MB in the beginning and 78.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 22:14:12,120 INFO L158 Benchmark]: RCFGBuilder took 494.48ms. Allocated memory is still 127.9MB. Free memory was 78.3MB in the beginning and 58.0MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-07-19 22:14:12,120 INFO L158 Benchmark]: TraceAbstraction took 86011.32ms. Allocated memory was 127.9MB in the beginning and 903.9MB in the end (delta: 775.9MB). Free memory was 57.3MB in the beginning and 791.8MB in the end (delta: -734.4MB). Peak memory consumption was 532.2MB. Max. memory is 16.1GB. [2022-07-19 22:14:12,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1357.51ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 69.6MB in the beginning and 86.0MB in the end (delta: -16.4MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 95.54ms. Allocated memory is still 127.9MB. Free memory was 86.0MB in the beginning and 81.0MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.39ms. Allocated memory is still 127.9MB. Free memory was 81.0MB in the beginning and 78.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 494.48ms. Allocated memory is still 127.9MB. Free memory was 78.3MB in the beginning and 58.0MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 86011.32ms. Allocated memory was 127.9MB in the beginning and 903.9MB in the end (delta: 775.9MB). Free memory was 57.3MB in the beginning and 791.8MB in the end (delta: -734.4MB). Peak memory consumption was 532.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:137) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-19 22:14:12,169 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_linked_list_begin_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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 22:14:13,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 22:14:13,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 22:14:13,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 22:14:13,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 22:14:13,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 22:14:13,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 22:14:13,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 22:14:13,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 22:14:13,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 22:14:13,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 22:14:13,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 22:14:13,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 22:14:13,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 22:14:13,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 22:14:13,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 22:14:13,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 22:14:13,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 22:14:13,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 22:14:13,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 22:14:13,822 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 22:14:13,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 22:14:13,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 22:14:13,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 22:14:13,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 22:14:13,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 22:14:13,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 22:14:13,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 22:14:13,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 22:14:13,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 22:14:13,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 22:14:13,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 22:14:13,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 22:14:13,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 22:14:13,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 22:14:13,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 22:14:13,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 22:14:13,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 22:14:13,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 22:14:13,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 22:14:13,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 22:14:13,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 22:14:13,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-07-19 22:14:13,867 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 22:14:13,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 22:14:13,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 22:14:13,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 22:14:13,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 22:14:13,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 22:14:13,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 22:14:13,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 22:14:13,868 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 22:14:13,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 22:14:13,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 22:14:13,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 22:14:13,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:14:13,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 22:14:13,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 22:14:13,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 22:14:13,870 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-19 22:14:13,870 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-19 22:14:13,870 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 22:14:13,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 22:14:13,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 22:14:13,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-19 22:14:13,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-07-19 22:14:14,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 22:14:14,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 22:14:14,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 22:14:14,135 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 22:14:14,135 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 22:14:14,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-07-19 22:14:14,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c3def88/e474e18921d54719a8f149753e890219/FLAGb70f7d5b9 [2022-07-19 22:14:14,786 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 22:14:14,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-07-19 22:14:14,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c3def88/e474e18921d54719a8f149753e890219/FLAGb70f7d5b9 [2022-07-19 22:14:15,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c3def88/e474e18921d54719a8f149753e890219 [2022-07-19 22:14:15,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 22:14:15,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 22:14:15,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 22:14:15,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 22:14:15,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 22:14:15,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:14:15" (1/1) ... [2022-07-19 22:14:15,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13598d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:14:15, skipping insertion in model container [2022-07-19 22:14:15,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:14:15" (1/1) ... [2022-07-19 22:14:15,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 22:14:15,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 22:14:15,466 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_linked_list_begin_harness.i[4495,4508] [2022-07-19 22:14:15,472 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_linked_list_begin_harness.i[4555,4568] [2022-07-19 22:14:16,041 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,042 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,043 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,043 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,044 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,058 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,058 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,059 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,060 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,061 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,062 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,063 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,063 WARN L1550 CHandler]: Possible shadowing of function index [2022-07-19 22:14:16,281 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-07-19 22:14:16,282 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-07-19 22:14:16,282 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-07-19 22:14:16,283 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-07-19 22:14:16,284 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-07-19 22:14:16,285 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-07-19 22:14:16,285 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-07-19 22:14:16,286 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-07-19 22:14:16,286 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-07-19 22:14:16,294 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-07-19 22:14:16,371 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-07-19 22:14:16,380 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.ArithmeticException: BigInteger out of int range at java.base/java.math.BigInteger.intValueExact(BigInteger.java:4784) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.checkIfNecessaryMemoryModelAdaption(CHandler.java:1009) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:968) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:279) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1384) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:249) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.translateInitializer(CHandler.java:2978) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleIASTDeclarator(CHandler.java:2836) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2138) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:143) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1135) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:211) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1081) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1470) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:155) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3276) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2361) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:601) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:192) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:128) 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) [2022-07-19 22:14:16,388 INFO L158 Benchmark]: Toolchain (without parser) took 1174.77ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 37.0MB in the beginning and 47.6MB in the end (delta: -10.6MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2022-07-19 22:14:16,389 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 62.9MB. Free memory was 45.3MB in the beginning and 45.2MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 22:14:16,389 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1172.48ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 36.7MB in the beginning and 47.6MB in the end (delta: -10.9MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2022-07-19 22:14:16,390 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 62.9MB. Free memory was 45.3MB in the beginning and 45.2MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1172.48ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 36.7MB in the beginning and 47.6MB in the end (delta: -10.9MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of int range de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: ArithmeticException: BigInteger out of int range: java.base/java.math.BigInteger.intValueExact(BigInteger.java:4784) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: ArithmeticException: BigInteger out of int range