./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_pop_front_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 edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:06:52,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:06:52,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:06:52,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:06:52,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:06:52,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:06:52,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:06:52,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:06:52,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:06:52,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:06:52,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:06:52,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:06:52,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:06:52,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:06:52,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:06:52,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:06:52,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:06:52,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:06:52,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:06:52,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:06:52,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:06:52,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:06:52,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:06:52,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:06:52,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:06:52,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:06:52,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:06:52,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:06:52,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:06:52,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:06:52,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:06:52,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:06:52,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:06:52,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:06:52,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:06:52,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:06:52,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:06:52,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:06:52,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:06:52,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:06:52,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:06:52,253 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:06:52,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:06:52,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:06:52,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:06:52,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:06:52,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:06:52,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:06:52,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:06:52,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:06:52,287 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:06:52,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:06:52,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:06:52,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:06:52,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:06:52,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:06:52,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:06:52,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:06:52,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:06:52,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:06:52,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:06:52,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:06:52,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:06:52,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:06:52,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:06:52,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:06:52,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:06:52,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:06:52,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:06:52,292 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:06:52,292 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:06:52,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:06:52,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:06:52,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2021-12-14 17:06:52,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:06:52,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:06:52,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:06:52,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:06:52,535 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:06:52,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-12-14 17:06:52,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058e97cdd/87711454eb314ee09bc242075df081ed/FLAGbfb23ce23 [2021-12-14 17:06:53,151 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:06:53,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2021-12-14 17:06:53,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058e97cdd/87711454eb314ee09bc242075df081ed/FLAGbfb23ce23 [2021-12-14 17:06:53,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058e97cdd/87711454eb314ee09bc242075df081ed [2021-12-14 17:06:53,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:06:53,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:06:53,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:06:53,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:06:53,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:06:53,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:06:53" (1/1) ... [2021-12-14 17:06:53,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0fddff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:53, skipping insertion in model container [2021-12-14 17:06:53,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:06:53" (1/1) ... [2021-12-14 17:06:53,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:06:53,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:06:53,634 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_pop_front_harness.i[4499,4512] [2021-12-14 17:06:53,639 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_pop_front_harness.i[4559,4572] [2021-12-14 17:06:54,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,075 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,082 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,093 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,093 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,094 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,277 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:06:54,278 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:06:54,279 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:06:54,280 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:06:54,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:06:54,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:06:54,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:06:54,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:06:54,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:06:54,283 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:06:54,383 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:06:54,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:06:54,413 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:06:54,422 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_pop_front_harness.i[4499,4512] [2021-12-14 17:06:54,423 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_pop_front_harness.i[4559,4572] [2021-12-14 17:06:54,468 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,468 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,469 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,469 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,470 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,475 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,475 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,476 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,476 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,477 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,478 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,478 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,478 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-14 17:06:54,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-14 17:06:54,523 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-14 17:06:54,524 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-14 17:06:54,524 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-14 17:06:54,525 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-14 17:06:54,525 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-14 17:06:54,526 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-14 17:06:54,526 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-14 17:06:54,526 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-14 17:06:54,527 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-14 17:06:54,541 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-14 17:06:54,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:06:54,730 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:06:54,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54 WrapperNode [2021-12-14 17:06:54,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:06:54,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:06:54,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:06:54,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:06:54,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,822 INFO L137 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2021-12-14 17:06:54,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:06:54,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:06:54,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:06:54,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:06:54,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:06:54,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:06:54,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:06:54,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:06:54,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (1/1) ... [2021-12-14 17:06:54,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:06:54,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:54,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:06:54,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:06:54,927 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-14 17:06:54,928 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-14 17:06:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-12-14 17:06:54,929 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-12-14 17:06:54,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:06:54,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:06:54,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 17:06:54,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 17:06:54,930 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-14 17:06:54,931 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-14 17:06:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:06:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-14 17:06:54,931 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-14 17:06:54,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:06:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:06:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:06:54,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:06:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-12-14 17:06:54,932 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-12-14 17:06:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 17:06:54,932 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 17:06:54,933 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:06:54,933 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:06:54,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:06:54,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:06:54,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:06:54,934 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-14 17:06:54,934 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-14 17:06:54,934 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-14 17:06:54,934 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-14 17:06:54,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:06:55,181 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:06:55,182 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:06:55,415 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:06:55,420 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:06:55,421 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-14 17:06:55,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:06:55 BoogieIcfgContainer [2021-12-14 17:06:55,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:06:55,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:06:55,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:06:55,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:06:55,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:06:53" (1/3) ... [2021-12-14 17:06:55,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4837d097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:06:55, skipping insertion in model container [2021-12-14 17:06:55,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:06:54" (2/3) ... [2021-12-14 17:06:55,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4837d097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:06:55, skipping insertion in model container [2021-12-14 17:06:55,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:06:55" (3/3) ... [2021-12-14 17:06:55,436 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2021-12-14 17:06:55,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:06:55,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:06:55,472 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:06:55,476 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:06:55,477 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:06:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-14 17:06:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 17:06:55,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:55,497 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:06:55,497 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1579343520, now seen corresponding path program 1 times [2021-12-14 17:06:55,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065433567] [2021-12-14 17:06:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:55,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:06:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:06:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:06:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:06:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:06:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:06:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:06:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:06:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:06:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:55,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:06:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-14 17:06:56,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065433567] [2021-12-14 17:06:56,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065433567] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:56,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936893568] [2021-12-14 17:06:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:56,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:56,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:56,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:56,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:06:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:06:56,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-14 17:06:56,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:56,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936893568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:56,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:56,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-14 17:06:56,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381621071] [2021-12-14 17:06:56,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:56,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:06:56,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:06:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:06:56,492 INFO L87 Difference]: Start difference. First operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:06:56,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:56,550 INFO L93 Difference]: Finished difference Result 274 states and 414 transitions. [2021-12-14 17:06:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:06:56,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-12-14 17:06:56,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:56,559 INFO L225 Difference]: With dead ends: 274 [2021-12-14 17:06:56,564 INFO L226 Difference]: Without dead ends: 140 [2021-12-14 17:06:56,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:06:56,571 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 12 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:56,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 536 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:06:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-14 17:06:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-12-14 17:06:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.244186046511628) internal successors, (107), 87 states have internal predecessors, (107), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-14 17:06:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2021-12-14 17:06:56,610 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 116 [2021-12-14 17:06:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:56,612 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2021-12-14 17:06:56,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:06:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2021-12-14 17:06:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 17:06:56,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:56,619 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:06:56,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:56,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-14 17:06:56,820 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:56,821 INFO L85 PathProgramCache]: Analyzing trace with hash -183799078, now seen corresponding path program 1 times [2021-12-14 17:06:56,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:56,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070462413] [2021-12-14 17:06:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:56,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:06:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:06:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:06:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:06:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:06:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:06:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:06:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:06:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:56,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:06:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:06:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-14 17:06:57,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:57,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070462413] [2021-12-14 17:06:57,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070462413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601187110] [2021-12-14 17:06:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:57,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:57,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:57,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:57,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:06:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 17:06:57,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-14 17:06:57,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:57,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601187110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:57,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:57,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-14 17:06:57,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526899602] [2021-12-14 17:06:57,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:57,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:06:57,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:57,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:06:57,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:06:57,392 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:06:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:57,447 INFO L93 Difference]: Finished difference Result 252 states and 345 transitions. [2021-12-14 17:06:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:06:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2021-12-14 17:06:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:57,451 INFO L225 Difference]: With dead ends: 252 [2021-12-14 17:06:57,452 INFO L226 Difference]: Without dead ends: 138 [2021-12-14 17:06:57,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:06:57,455 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 3 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:57,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 520 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:06:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-14 17:06:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-14 17:06:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-14 17:06:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2021-12-14 17:06:57,473 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 116 [2021-12-14 17:06:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:57,474 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2021-12-14 17:06:57,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:06:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2021-12-14 17:06:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 17:06:57,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:57,482 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:06:57,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:57,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-14 17:06:57,700 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash -543175276, now seen corresponding path program 1 times [2021-12-14 17:06:57,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:57,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506065779] [2021-12-14 17:06:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:57,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:06:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:06:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:06:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:57,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:06:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:06:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:06:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:06:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:06:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:06:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:06:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-14 17:06:58,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:58,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506065779] [2021-12-14 17:06:58,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506065779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:58,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542093914] [2021-12-14 17:06:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:58,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:58,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:58,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:58,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:06:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:58,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 17:06:58,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:58,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-14 17:06:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-14 17:06:59,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:06:59,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542093914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:06:59,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:06:59,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 18 [2021-12-14 17:06:59,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261675927] [2021-12-14 17:06:59,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:06:59,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:06:59,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:06:59,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:06:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:06:59,022 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 12 states have internal predecessors, (62), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-14 17:06:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:06:59,172 INFO L93 Difference]: Finished difference Result 327 states and 442 transitions. [2021-12-14 17:06:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 17:06:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 12 states have internal predecessors, (62), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 116 [2021-12-14 17:06:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:06:59,176 INFO L225 Difference]: With dead ends: 327 [2021-12-14 17:06:59,176 INFO L226 Difference]: Without dead ends: 213 [2021-12-14 17:06:59,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:06:59,178 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 58 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:06:59,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 777 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2021-12-14 17:06:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-14 17:06:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 179. [2021-12-14 17:06:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 122 states have internal predecessors, (144), 45 states have call successors, (45), 13 states have call predecessors, (45), 14 states have return successors, (47), 43 states have call predecessors, (47), 44 states have call successors, (47) [2021-12-14 17:06:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 236 transitions. [2021-12-14 17:06:59,198 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 236 transitions. Word has length 116 [2021-12-14 17:06:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:06:59,199 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 236 transitions. [2021-12-14 17:06:59,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 12 states have internal predecessors, (62), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-14 17:06:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 236 transitions. [2021-12-14 17:06:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 17:06:59,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:06:59,201 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:06:59,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 17:06:59,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:59,415 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:06:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:06:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash -670206630, now seen corresponding path program 1 times [2021-12-14 17:06:59,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:06:59,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678007627] [2021-12-14 17:06:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:59,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:06:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:06:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:06:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:06:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:06:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:06:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:06:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:06:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:06:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:06:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:06:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:06:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:06:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:06:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:06:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-14 17:06:59,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:06:59,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678007627] [2021-12-14 17:06:59,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678007627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:06:59,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680323358] [2021-12-14 17:06:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:06:59,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:06:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:06:59,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:06:59,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 17:06:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:06:59,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-14 17:06:59,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:06:59,927 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:06:59,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:06:59,937 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:06:59,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:07:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 107 proven. 7 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:07:00,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-14 17:07:01,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680323358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:01,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:01,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 11] total 29 [2021-12-14 17:07:01,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663008168] [2021-12-14 17:07:01,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:01,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 17:07:01,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 17:07:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-12-14 17:07:01,299 INFO L87 Difference]: Start difference. First operand 179 states and 236 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 11 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (35), 9 states have call predecessors, (35), 11 states have call successors, (35) [2021-12-14 17:07:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:02,925 INFO L93 Difference]: Finished difference Result 436 states and 617 transitions. [2021-12-14 17:07:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 17:07:02,925 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 11 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (35), 9 states have call predecessors, (35), 11 states have call successors, (35) Word has length 116 [2021-12-14 17:07:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:02,930 INFO L225 Difference]: With dead ends: 436 [2021-12-14 17:07:02,931 INFO L226 Difference]: Without dead ends: 314 [2021-12-14 17:07:02,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 244 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=399, Invalid=2463, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 17:07:02,939 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 302 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 3117 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:02,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 3117 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1346 Invalid, 0 Unknown, 370 Unchecked, 0.8s Time] [2021-12-14 17:07:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-14 17:07:02,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 226. [2021-12-14 17:07:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 152 states have internal predecessors, (176), 58 states have call successors, (58), 17 states have call predecessors, (58), 18 states have return successors, (73), 56 states have call predecessors, (73), 57 states have call successors, (73) [2021-12-14 17:07:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 307 transitions. [2021-12-14 17:07:02,973 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 307 transitions. Word has length 116 [2021-12-14 17:07:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:02,974 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 307 transitions. [2021-12-14 17:07:02,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 11 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (35), 9 states have call predecessors, (35), 11 states have call successors, (35) [2021-12-14 17:07:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 307 transitions. [2021-12-14 17:07:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 17:07:02,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:02,976 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:02,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:03,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:03,191 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1395986770, now seen corresponding path program 1 times [2021-12-14 17:07:03,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:03,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20743275] [2021-12-14 17:07:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:03,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:07:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:07:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:07:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:07:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:07:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:07:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:07:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:07:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-14 17:07:03,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20743275] [2021-12-14 17:07:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20743275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551782189] [2021-12-14 17:07:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:03,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:03,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:03,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:03,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 17:07:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 17:07:03,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:07:03,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:03,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551782189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:03,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:03,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-12-14 17:07:03,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960152851] [2021-12-14 17:07:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:03,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:07:03,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:07:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-14 17:07:03,716 INFO L87 Difference]: Start difference. First operand 226 states and 307 transitions. Second operand has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 17:07:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:03,891 INFO L93 Difference]: Finished difference Result 417 states and 561 transitions. [2021-12-14 17:07:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:07:03,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 116 [2021-12-14 17:07:03,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:03,895 INFO L225 Difference]: With dead ends: 417 [2021-12-14 17:07:03,895 INFO L226 Difference]: Without dead ends: 187 [2021-12-14 17:07:03,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:07:03,897 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 244 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:03,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 751 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:03,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-14 17:07:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-12-14 17:07:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 119 states have internal predecessors, (138), 50 states have call successors, (50), 15 states have call predecessors, (50), 15 states have return successors, (53), 48 states have call predecessors, (53), 49 states have call successors, (53) [2021-12-14 17:07:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 241 transitions. [2021-12-14 17:07:03,925 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 241 transitions. Word has length 116 [2021-12-14 17:07:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:03,927 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 241 transitions. [2021-12-14 17:07:03,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-14 17:07:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 241 transitions. [2021-12-14 17:07:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-14 17:07:03,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:03,930 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:03,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:04,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:04,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:04,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1369878566, now seen corresponding path program 2 times [2021-12-14 17:07:04,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:04,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219104370] [2021-12-14 17:07:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:04,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:07:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:07:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:07:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:07:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 17:07:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:07:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:07:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:07:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-14 17:07:04,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:04,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219104370] [2021-12-14 17:07:04,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219104370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:04,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002825781] [2021-12-14 17:07:04,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 17:07:04,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:04,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:04,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:04,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 17:07:04,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 17:07:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 17:07:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-14 17:07:04,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:04,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:04,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-14 17:07:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-14 17:07:06,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:06,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002825781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:06,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:06,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2021-12-14 17:07:06,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078844614] [2021-12-14 17:07:06,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:06,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:07:06,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:07:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-12-14 17:07:06,214 INFO L87 Difference]: Start difference. First operand 183 states and 241 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-14 17:07:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:06,388 INFO L93 Difference]: Finished difference Result 403 states and 542 transitions. [2021-12-14 17:07:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 17:07:06,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 116 [2021-12-14 17:07:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:06,390 INFO L225 Difference]: With dead ends: 403 [2021-12-14 17:07:06,390 INFO L226 Difference]: Without dead ends: 277 [2021-12-14 17:07:06,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 119 SyntacticMatches, 20 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-12-14 17:07:06,393 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 64 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:06,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1526 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 201 Unchecked, 0.1s Time] [2021-12-14 17:07:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-14 17:07:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 233. [2021-12-14 17:07:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 154 states have (on average 1.1948051948051948) internal successors, (184), 156 states have internal predecessors, (184), 58 states have call successors, (58), 20 states have call predecessors, (58), 20 states have return successors, (65), 56 states have call predecessors, (65), 57 states have call successors, (65) [2021-12-14 17:07:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 307 transitions. [2021-12-14 17:07:06,416 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 307 transitions. Word has length 116 [2021-12-14 17:07:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:06,418 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 307 transitions. [2021-12-14 17:07:06,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-14 17:07:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 307 transitions. [2021-12-14 17:07:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-14 17:07:06,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:06,419 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:06,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:06,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:06,624 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:06,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1492302642, now seen corresponding path program 1 times [2021-12-14 17:07:06,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:06,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53325225] [2021-12-14 17:07:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:06,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:07:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:07:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:07:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:07:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:07:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 17:07:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-14 17:07:06,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53325225] [2021-12-14 17:07:06,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53325225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336208522] [2021-12-14 17:07:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:06,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:06,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:06,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:06,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 17:07:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:06,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 17:07:06,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:06,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:07:07,113 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 17:07:07,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 17:07:07,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-14 17:07:07,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 17:07:07,190 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-14 17:07:07,190 INFO L388 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 68 [2021-12-14 17:07:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2021-12-14 17:07:07,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-14 17:07:07,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-14 17:07:07,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 17:07:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 17 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-14 17:07:19,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:20,130 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_569 (Array Int Int)) (v_ArrVal_571 Int) (v_ArrVal_570 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_569) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_570) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_571)) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.offset|) 0))) is different from false [2021-12-14 17:07:20,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:20,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-14 17:07:20,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:20,157 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 156 [2021-12-14 17:07:20,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 140 [2021-12-14 17:07:20,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 138 [2021-12-14 17:07:20,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-14 17:07:20,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-14 17:07:20,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:20,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2021-12-14 17:07:20,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336208522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:20,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 17:07:20,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2021-12-14 17:07:20,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054514502] [2021-12-14 17:07:20,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:20,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 17:07:20,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 17:07:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=524, Unknown=2, NotChecked=46, Total=650 [2021-12-14 17:07:20,496 INFO L87 Difference]: Start difference. First operand 233 states and 307 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-14 17:07:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:22,425 INFO L93 Difference]: Finished difference Result 541 states and 750 transitions. [2021-12-14 17:07:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 17:07:22,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 118 [2021-12-14 17:07:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:22,428 INFO L225 Difference]: With dead ends: 541 [2021-12-14 17:07:22,428 INFO L226 Difference]: Without dead ends: 342 [2021-12-14 17:07:22,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 227 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=168, Invalid=1240, Unknown=2, NotChecked=72, Total=1482 [2021-12-14 17:07:22,430 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 99 mSDsluCounter, 2201 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:22,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 2431 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 404 Invalid, 0 Unknown, 480 Unchecked, 0.3s Time] [2021-12-14 17:07:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-14 17:07:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 258. [2021-12-14 17:07:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 170 states have (on average 1.1823529411764706) internal successors, (201), 175 states have internal predecessors, (201), 62 states have call successors, (62), 23 states have call predecessors, (62), 25 states have return successors, (74), 59 states have call predecessors, (74), 61 states have call successors, (74) [2021-12-14 17:07:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 337 transitions. [2021-12-14 17:07:22,446 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 337 transitions. Word has length 118 [2021-12-14 17:07:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:22,447 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 337 transitions. [2021-12-14 17:07:22,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-14 17:07:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 337 transitions. [2021-12-14 17:07:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-14 17:07:22,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:22,449 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:22,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:22,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:22,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:22,656 INFO L85 PathProgramCache]: Analyzing trace with hash -924092300, now seen corresponding path program 1 times [2021-12-14 17:07:22,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:22,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653460296] [2021-12-14 17:07:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:22,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 17:07:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 17:07:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:07:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:07:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:07:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-14 17:07:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-14 17:07:22,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:22,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653460296] [2021-12-14 17:07:22,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653460296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:22,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473471983] [2021-12-14 17:07:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:22,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:22,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:22,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:22,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 17:07:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:22,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 17:07:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-14 17:07:23,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:23,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473471983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:23,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:23,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-14 17:07:23,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17000609] [2021-12-14 17:07:23,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:23,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:07:23,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:23,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:07:23,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:07:23,152 INFO L87 Difference]: Start difference. First operand 258 states and 337 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-14 17:07:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:23,363 INFO L93 Difference]: Finished difference Result 459 states and 607 transitions. [2021-12-14 17:07:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 17:07:23,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 120 [2021-12-14 17:07:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:23,365 INFO L225 Difference]: With dead ends: 459 [2021-12-14 17:07:23,365 INFO L226 Difference]: Without dead ends: 264 [2021-12-14 17:07:23,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:07:23,367 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 211 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:23,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 750 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:07:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-14 17:07:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-12-14 17:07:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 173 states have (on average 1.1791907514450868) internal successors, (204), 179 states have internal predecessors, (204), 62 states have call successors, (62), 23 states have call predecessors, (62), 26 states have return successors, (76), 59 states have call predecessors, (76), 61 states have call successors, (76) [2021-12-14 17:07:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 342 transitions. [2021-12-14 17:07:23,381 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 342 transitions. Word has length 120 [2021-12-14 17:07:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:23,381 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 342 transitions. [2021-12-14 17:07:23,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-14 17:07:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 342 transitions. [2021-12-14 17:07:23,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-14 17:07:23,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:23,384 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:23,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-14 17:07:23,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-14 17:07:23,602 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1411420641, now seen corresponding path program 1 times [2021-12-14 17:07:23,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:23,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831363796] [2021-12-14 17:07:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:23,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 17:07:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 17:07:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 17:07:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:07:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:07:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 17:07:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-14 17:07:23,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:23,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831363796] [2021-12-14 17:07:23,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831363796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:23,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871312843] [2021-12-14 17:07:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:23,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:23,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:23,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:23,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 17:07:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:23,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 17:07:23,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-14 17:07:24,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:24,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871312843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:24,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:24,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-12-14 17:07:24,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501373226] [2021-12-14 17:07:24,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:24,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:07:24,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:24,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:07:24,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:07:24,108 INFO L87 Difference]: Start difference. First operand 262 states and 342 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-14 17:07:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:24,387 INFO L93 Difference]: Finished difference Result 479 states and 642 transitions. [2021-12-14 17:07:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:07:24,387 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 122 [2021-12-14 17:07:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:24,389 INFO L225 Difference]: With dead ends: 479 [2021-12-14 17:07:24,389 INFO L226 Difference]: Without dead ends: 280 [2021-12-14 17:07:24,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:07:24,392 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 248 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:24,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 874 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:07:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-14 17:07:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2021-12-14 17:07:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 176 states have (on average 1.1818181818181819) internal successors, (208), 182 states have internal predecessors, (208), 62 states have call successors, (62), 23 states have call predecessors, (62), 26 states have return successors, (76), 59 states have call predecessors, (76), 61 states have call successors, (76) [2021-12-14 17:07:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 346 transitions. [2021-12-14 17:07:24,403 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 346 transitions. Word has length 122 [2021-12-14 17:07:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:24,404 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 346 transitions. [2021-12-14 17:07:24,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-14 17:07:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 346 transitions. [2021-12-14 17:07:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-14 17:07:24,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:24,405 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:24,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:24,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:24,627 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:24,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1165436143, now seen corresponding path program 1 times [2021-12-14 17:07:24,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:24,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512493821] [2021-12-14 17:07:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:24,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:07:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:07:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 17:07:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:07:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 17:07:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-14 17:07:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-14 17:07:24,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:24,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512493821] [2021-12-14 17:07:24,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512493821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:24,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251879864] [2021-12-14 17:07:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:24,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:24,758 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:24,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 17:07:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 17:07:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-14 17:07:25,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:25,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251879864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:25,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:25,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 17:07:25,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834175285] [2021-12-14 17:07:25,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:25,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 17:07:25,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:25,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 17:07:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:07:25,045 INFO L87 Difference]: Start difference. First operand 265 states and 346 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:07:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:25,066 INFO L93 Difference]: Finished difference Result 478 states and 642 transitions. [2021-12-14 17:07:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 17:07:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 123 [2021-12-14 17:07:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:25,068 INFO L225 Difference]: With dead ends: 478 [2021-12-14 17:07:25,068 INFO L226 Difference]: Without dead ends: 276 [2021-12-14 17:07:25,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:07:25,069 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 6 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:25,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 353 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:07:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-14 17:07:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2021-12-14 17:07:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 179 states have (on average 1.1787709497206704) internal successors, (211), 186 states have internal predecessors, (211), 63 states have call successors, (63), 23 states have call predecessors, (63), 27 states have return successors, (83), 60 states have call predecessors, (83), 62 states have call successors, (83) [2021-12-14 17:07:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 357 transitions. [2021-12-14 17:07:25,088 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 357 transitions. Word has length 123 [2021-12-14 17:07:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:25,088 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 357 transitions. [2021-12-14 17:07:25,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:07:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 357 transitions. [2021-12-14 17:07:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-14 17:07:25,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:25,090 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:25,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:25,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 17:07:25,310 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:25,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1662855644, now seen corresponding path program 1 times [2021-12-14 17:07:25,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:25,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107204979] [2021-12-14 17:07:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:25,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:07:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:07:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:07:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 17:07:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:07:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:07:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 17:07:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 17:07:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-14 17:07:25,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107204979] [2021-12-14 17:07:25,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107204979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860402589] [2021-12-14 17:07:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:25,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:25,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:25,507 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:25,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 17:07:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:25,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-14 17:07:25,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:25,717 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:25,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:07:25,728 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:25,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:07:26,684 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2021-12-14 17:07:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 105 proven. 17 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 17:07:27,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-14 17:07:28,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860402589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:28,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:28,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 12] total 32 [2021-12-14 17:07:28,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563014722] [2021-12-14 17:07:28,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:28,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 17:07:28,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 17:07:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=834, Unknown=1, NotChecked=58, Total=992 [2021-12-14 17:07:28,213 INFO L87 Difference]: Start difference. First operand 270 states and 357 transitions. Second operand has 32 states, 32 states have (on average 4.125) internal successors, (132), 30 states have internal predecessors, (132), 12 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) [2021-12-14 17:07:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:29,505 INFO L93 Difference]: Finished difference Result 520 states and 708 transitions. [2021-12-14 17:07:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 17:07:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 30 states have internal predecessors, (132), 12 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) Word has length 131 [2021-12-14 17:07:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:29,508 INFO L225 Difference]: With dead ends: 520 [2021-12-14 17:07:29,508 INFO L226 Difference]: Without dead ends: 302 [2021-12-14 17:07:29,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 269 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=281, Invalid=1978, Unknown=1, NotChecked=92, Total=2352 [2021-12-14 17:07:29,509 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 216 mSDsluCounter, 2407 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:29,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 2587 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1303 Invalid, 0 Unknown, 503 Unchecked, 0.7s Time] [2021-12-14 17:07:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-14 17:07:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 274. [2021-12-14 17:07:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.172972972972973) internal successors, (217), 192 states have internal predecessors, (217), 59 states have call successors, (59), 25 states have call predecessors, (59), 29 states have return successors, (81), 56 states have call predecessors, (81), 58 states have call successors, (81) [2021-12-14 17:07:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 357 transitions. [2021-12-14 17:07:29,522 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 357 transitions. Word has length 131 [2021-12-14 17:07:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:29,522 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 357 transitions. [2021-12-14 17:07:29,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 30 states have internal predecessors, (132), 12 states have call successors, (38), 4 states have call predecessors, (38), 7 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) [2021-12-14 17:07:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 357 transitions. [2021-12-14 17:07:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-14 17:07:29,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:29,524 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:29,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:29,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 17:07:29,746 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:29,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1363735611, now seen corresponding path program 1 times [2021-12-14 17:07:29,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:29,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262261758] [2021-12-14 17:07:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:29,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:07:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:07:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:07:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 17:07:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 17:07:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 17:07:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-14 17:07:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-14 17:07:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-14 17:07:29,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262261758] [2021-12-14 17:07:29,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262261758] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545640517] [2021-12-14 17:07:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:29,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:29,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:29,912 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:29,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 17:07:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 17:07:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-14 17:07:30,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:30,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545640517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:30,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:30,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 14 [2021-12-14 17:07:30,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092093210] [2021-12-14 17:07:30,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:30,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:07:30,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:30,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:07:30,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:07:30,389 INFO L87 Difference]: Start difference. First operand 274 states and 357 transitions. Second operand has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-14 17:07:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:30,694 INFO L93 Difference]: Finished difference Result 459 states and 604 transitions. [2021-12-14 17:07:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 17:07:30,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 129 [2021-12-14 17:07:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:30,696 INFO L225 Difference]: With dead ends: 459 [2021-12-14 17:07:30,696 INFO L226 Difference]: Without dead ends: 246 [2021-12-14 17:07:30,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-14 17:07:30,697 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 179 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:30,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1204 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:07:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-14 17:07:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 241. [2021-12-14 17:07:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 165 states have (on average 1.1636363636363636) internal successors, (192), 169 states have internal predecessors, (192), 52 states have call successors, (52), 22 states have call predecessors, (52), 23 states have return successors, (63), 49 states have call predecessors, (63), 51 states have call successors, (63) [2021-12-14 17:07:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 307 transitions. [2021-12-14 17:07:30,708 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 307 transitions. Word has length 129 [2021-12-14 17:07:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:30,709 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 307 transitions. [2021-12-14 17:07:30,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 10 states have internal predecessors, (63), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-14 17:07:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 307 transitions. [2021-12-14 17:07:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-14 17:07:30,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:30,711 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:30,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:30,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 17:07:30,944 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1187163488, now seen corresponding path program 1 times [2021-12-14 17:07:30,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:30,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153315364] [2021-12-14 17:07:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:30,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:07:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:07:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:07:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:07:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:07:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:07:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:07:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 17:07:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-14 17:07:31,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153315364] [2021-12-14 17:07:31,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153315364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71059146] [2021-12-14 17:07:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:31,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:31,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:31,092 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:31,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 17:07:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-14 17:07:31,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:31,384 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:31,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:07:31,394 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:31,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 17:07:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 109 proven. 15 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-14 17:07:32,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-14 17:07:33,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71059146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:33,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:33,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 19, 13] total 34 [2021-12-14 17:07:33,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222875091] [2021-12-14 17:07:33,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:33,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 17:07:33,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:33,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 17:07:33,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 17:07:33,818 INFO L87 Difference]: Start difference. First operand 241 states and 307 transitions. Second operand has 34 states, 33 states have (on average 4.363636363636363) internal successors, (144), 31 states have internal predecessors, (144), 13 states have call successors, (38), 4 states have call predecessors, (38), 9 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-14 17:07:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:35,793 INFO L93 Difference]: Finished difference Result 514 states and 726 transitions. [2021-12-14 17:07:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-14 17:07:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.363636363636363) internal successors, (144), 31 states have internal predecessors, (144), 13 states have call successors, (38), 4 states have call predecessors, (38), 9 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 132 [2021-12-14 17:07:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:35,796 INFO L225 Difference]: With dead ends: 514 [2021-12-14 17:07:35,796 INFO L226 Difference]: Without dead ends: 365 [2021-12-14 17:07:35,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 267 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=2538, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 17:07:35,798 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 151 mSDsluCounter, 4164 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 4401 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:35,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 4401 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2181 Invalid, 0 Unknown, 711 Unchecked, 1.4s Time] [2021-12-14 17:07:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-14 17:07:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 291. [2021-12-14 17:07:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 201 states have (on average 1.1592039800995024) internal successors, (233), 207 states have internal predecessors, (233), 59 states have call successors, (59), 27 states have call predecessors, (59), 30 states have return successors, (85), 56 states have call predecessors, (85), 58 states have call successors, (85) [2021-12-14 17:07:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 377 transitions. [2021-12-14 17:07:35,815 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 377 transitions. Word has length 132 [2021-12-14 17:07:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:35,815 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 377 transitions. [2021-12-14 17:07:35,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.363636363636363) internal successors, (144), 31 states have internal predecessors, (144), 13 states have call successors, (38), 4 states have call predecessors, (38), 9 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-14 17:07:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 377 transitions. [2021-12-14 17:07:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 17:07:35,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:35,817 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:35,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:36,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 17:07:36,032 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 800652698, now seen corresponding path program 1 times [2021-12-14 17:07:36,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:36,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535167327] [2021-12-14 17:07:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:36,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:07:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:07:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:07:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:07:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:07:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 17:07:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-14 17:07:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-14 17:07:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-14 17:07:36,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:36,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535167327] [2021-12-14 17:07:36,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535167327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:36,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775843468] [2021-12-14 17:07:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:36,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:36,264 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:36,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 17:07:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 17:07:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-14 17:07:36,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:36,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775843468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:36,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:36,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-12-14 17:07:36,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287608361] [2021-12-14 17:07:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:36,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:07:36,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:07:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-12-14 17:07:36,662 INFO L87 Difference]: Start difference. First operand 291 states and 377 transitions. Second operand has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-14 17:07:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:36,888 INFO L93 Difference]: Finished difference Result 479 states and 621 transitions. [2021-12-14 17:07:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:07:36,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 134 [2021-12-14 17:07:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:36,890 INFO L225 Difference]: With dead ends: 479 [2021-12-14 17:07:36,890 INFO L226 Difference]: Without dead ends: 288 [2021-12-14 17:07:36,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-12-14 17:07:36,891 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 227 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:36,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 872 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 17:07:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-12-14 17:07:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-12-14 17:07:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 199 states have (on average 1.1557788944723617) internal successors, (230), 204 states have internal predecessors, (230), 59 states have call successors, (59), 27 states have call predecessors, (59), 29 states have return successors, (81), 56 states have call predecessors, (81), 58 states have call successors, (81) [2021-12-14 17:07:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 370 transitions. [2021-12-14 17:07:36,912 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 370 transitions. Word has length 134 [2021-12-14 17:07:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:36,914 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 370 transitions. [2021-12-14 17:07:36,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.25) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-14 17:07:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 370 transitions. [2021-12-14 17:07:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 17:07:36,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:36,916 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:36,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:37,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:37,127 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:37,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:37,128 INFO L85 PathProgramCache]: Analyzing trace with hash 315027163, now seen corresponding path program 1 times [2021-12-14 17:07:37,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:37,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960957296] [2021-12-14 17:07:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:37,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:07:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:07:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:07:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:07:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-14 17:07:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-14 17:07:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 17:07:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-14 17:07:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-14 17:07:37,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960957296] [2021-12-14 17:07:37,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960957296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:37,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215512964] [2021-12-14 17:07:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:37,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:37,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:37,296 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:37,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 17:07:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:37,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 17:07:37,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 121 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-14 17:07:37,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-14 17:07:38,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215512964] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:38,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:38,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 7] total 18 [2021-12-14 17:07:38,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148425143] [2021-12-14 17:07:38,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:38,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 17:07:38,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 17:07:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:07:38,037 INFO L87 Difference]: Start difference. First operand 288 states and 370 transitions. Second operand has 18 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-14 17:07:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:38,235 INFO L93 Difference]: Finished difference Result 481 states and 626 transitions. [2021-12-14 17:07:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 17:07:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 145 [2021-12-14 17:07:38,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:38,245 INFO L225 Difference]: With dead ends: 481 [2021-12-14 17:07:38,245 INFO L226 Difference]: Without dead ends: 296 [2021-12-14 17:07:38,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-12-14 17:07:38,246 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 12 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:38,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2473 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 17:07:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-14 17:07:38,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 288. [2021-12-14 17:07:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 199 states have (on average 1.1557788944723617) internal successors, (230), 204 states have internal predecessors, (230), 59 states have call successors, (59), 27 states have call predecessors, (59), 29 states have return successors, (79), 56 states have call predecessors, (79), 58 states have call successors, (79) [2021-12-14 17:07:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 368 transitions. [2021-12-14 17:07:38,265 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 368 transitions. Word has length 145 [2021-12-14 17:07:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:38,266 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 368 transitions. [2021-12-14 17:07:38,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 8 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-12-14 17:07:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 368 transitions. [2021-12-14 17:07:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-14 17:07:38,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:38,268 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:38,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:38,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 17:07:38,483 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash 900691480, now seen corresponding path program 1 times [2021-12-14 17:07:38,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:38,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409554481] [2021-12-14 17:07:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:38,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:07:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:07:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:07:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:07:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:07:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:07:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 17:07:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:07:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 17:07:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-14 17:07:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 17:07:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 32 proven. 35 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-14 17:07:38,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:38,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409554481] [2021-12-14 17:07:38,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409554481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:38,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507995574] [2021-12-14 17:07:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:38,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:38,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:38,944 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:38,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 17:07:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:39,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-14 17:07:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:39,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:07:39,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-14 17:07:39,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:07:40,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-12-14 17:07:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 127 proven. 33 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-14 17:07:41,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:07:42,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 17:07:42,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 493 treesize of output 477 [2021-12-14 17:07:42,851 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 17:07:42,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 589 treesize of output 565 [2021-12-14 17:07:42,860 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 17:07:42,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 565 treesize of output 553 [2021-12-14 17:07:42,955 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 17:07:42,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 85 [2021-12-14 17:07:42,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2021-12-14 17:07:42,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 17:07:42,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 50 treesize of output 44 [2021-12-14 17:07:42,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 130 [2021-12-14 17:07:43,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-14 17:07:43,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-14 17:07:43,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-14 17:07:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-14 17:07:43,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507995574] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:07:43,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:07:43,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 18] total 51 [2021-12-14 17:07:43,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692622560] [2021-12-14 17:07:43,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:07:43,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-14 17:07:43,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:43,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-14 17:07:43,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2368, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 17:07:43,170 INFO L87 Difference]: Start difference. First operand 288 states and 368 transitions. Second operand has 51 states, 50 states have (on average 3.86) internal successors, (193), 47 states have internal predecessors, (193), 23 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 23 states have call predecessors, (48), 23 states have call successors, (48) [2021-12-14 17:07:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:48,538 INFO L93 Difference]: Finished difference Result 792 states and 1014 transitions. [2021-12-14 17:07:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-14 17:07:48,539 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.86) internal successors, (193), 47 states have internal predecessors, (193), 23 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 23 states have call predecessors, (48), 23 states have call successors, (48) Word has length 148 [2021-12-14 17:07:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:48,541 INFO L225 Difference]: With dead ends: 792 [2021-12-14 17:07:48,541 INFO L226 Difference]: Without dead ends: 475 [2021-12-14 17:07:48,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 299 SyntacticMatches, 19 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4413 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=957, Invalid=14049, Unknown=0, NotChecked=0, Total=15006 [2021-12-14 17:07:48,545 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 678 mSDsluCounter, 8429 mSDsCounter, 0 mSdLazyCounter, 4399 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 8731 SdHoareTripleChecker+Invalid, 5738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 4399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 893 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:48,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 8731 Invalid, 5738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 4399 Invalid, 0 Unknown, 893 Unchecked, 2.6s Time] [2021-12-14 17:07:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-14 17:07:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 418. [2021-12-14 17:07:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 292 states have (on average 1.1849315068493151) internal successors, (346), 298 states have internal predecessors, (346), 84 states have call successors, (84), 38 states have call predecessors, (84), 41 states have return successors, (99), 81 states have call predecessors, (99), 82 states have call successors, (99) [2021-12-14 17:07:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 529 transitions. [2021-12-14 17:07:48,566 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 529 transitions. Word has length 148 [2021-12-14 17:07:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:48,567 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 529 transitions. [2021-12-14 17:07:48,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.86) internal successors, (193), 47 states have internal predecessors, (193), 23 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 23 states have call predecessors, (48), 23 states have call successors, (48) [2021-12-14 17:07:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 529 transitions. [2021-12-14 17:07:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-14 17:07:48,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:48,569 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:48,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:48,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 17:07:48,783 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:48,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1268885027, now seen corresponding path program 1 times [2021-12-14 17:07:48,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:48,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220110757] [2021-12-14 17:07:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:48,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:07:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:07:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 17:07:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:07:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:07:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:07:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 17:07:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 17:07:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:48,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:49,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-14 17:07:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:49,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 17:07:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:49,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:49,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-14 17:07:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:49,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 17:07:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-14 17:07:49,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:49,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220110757] [2021-12-14 17:07:49,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220110757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:49,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288155914] [2021-12-14 17:07:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:49,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:49,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:49,032 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:49,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 17:07:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:49,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 17:07:49,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-14 17:07:49,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:07:49,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288155914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:07:49,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:07:49,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 13 [2021-12-14 17:07:49,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738647450] [2021-12-14 17:07:49,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:07:49,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:07:49,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:07:49,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:07:49,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:07:49,591 INFO L87 Difference]: Start difference. First operand 418 states and 529 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-14 17:07:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:07:49,762 INFO L93 Difference]: Finished difference Result 779 states and 1007 transitions. [2021-12-14 17:07:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:07:49,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 162 [2021-12-14 17:07:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:07:49,765 INFO L225 Difference]: With dead ends: 779 [2021-12-14 17:07:49,765 INFO L226 Difference]: Without dead ends: 460 [2021-12-14 17:07:49,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-12-14 17:07:49,782 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 17 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:07:49,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1192 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2021-12-14 17:07:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-14 17:07:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-12-14 17:07:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 304 states have (on average 1.1875) internal successors, (361), 310 states have internal predecessors, (361), 84 states have call successors, (84), 38 states have call predecessors, (84), 43 states have return successors, (103), 83 states have call predecessors, (103), 82 states have call successors, (103) [2021-12-14 17:07:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 548 transitions. [2021-12-14 17:07:49,801 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 548 transitions. Word has length 162 [2021-12-14 17:07:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:07:49,801 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 548 transitions. [2021-12-14 17:07:49,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-14 17:07:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 548 transitions. [2021-12-14 17:07:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-14 17:07:49,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:07:49,803 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:07:49,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 17:07:50,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 17:07:50,019 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:07:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:07:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash 526975427, now seen corresponding path program 1 times [2021-12-14 17:07:50,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:07:50,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950364266] [2021-12-14 17:07:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:50,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:07:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:07:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:07:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 17:07:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:07:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 17:07:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:07:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:07:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:07:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:07:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 17:07:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:07:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 17:07:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-14 17:07:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:07:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-14 17:07:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-14 17:07:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-14 17:07:50,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:07:50,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950364266] [2021-12-14 17:07:50,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950364266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:07:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772396606] [2021-12-14 17:07:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:07:50,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:07:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:07:50,208 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:07:50,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 17:07:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:07:50,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-14 17:07:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:07:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 17:07:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-14 17:07:50,571 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 17:07:50,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-14 17:07:50,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-14 17:07:50,587 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 17:07:50,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 17:07:50,651 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-14 17:07:50,651 INFO L388 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2021-12-14 17:07:50,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 17:07:50,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-12-14 17:07:50,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-14 17:07:50,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 31 treesize of output 23 [2021-12-14 17:07:50,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9