./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_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 bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 00:55:33,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 00:55:33,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 00:55:33,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 00:55:33,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 00:55:33,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 00:55:33,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 00:55:33,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 00:55:33,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 00:55:33,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 00:55:33,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 00:55:33,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 00:55:33,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 00:55:33,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 00:55:33,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 00:55:33,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 00:55:33,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 00:55:33,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 00:55:33,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 00:55:33,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 00:55:33,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 00:55:33,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 00:55:33,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 00:55:33,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 00:55:33,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 00:55:33,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 00:55:33,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 00:55:33,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 00:55:33,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 00:55:33,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 00:55:33,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 00:55:33,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 00:55:33,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 00:55:33,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 00:55:33,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 00:55:33,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 00:55:33,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 00:55:33,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 00:55:33,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 00:55:33,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 00:55:33,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 00:55:33,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-18 00:55:33,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 00:55:33,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 00:55:33,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 00:55:33,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 00:55:33,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 00:55:33,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 00:55:33,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 00:55:33,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 00:55:33,284 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 00:55:33,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 00:55:33,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 00:55:33,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 00:55:33,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 00:55:33,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 00:55:33,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 00:55:33,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 00:55:33,285 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 00:55:33,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 00:55:33,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 00:55:33,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 00:55:33,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 00:55:33,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:55:33,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 00:55:33,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 00:55:33,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 00:55:33,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 00:55:33,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 00:55:33,288 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 00:55:33,288 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 00:55:33,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 00:55:33,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 00:55:33,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 [2021-12-18 00:55:33,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 00:55:33,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 00:55:33,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 00:55:33,471 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 00:55:33,472 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 00:55:33,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-12-18 00:55:33,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9c2a9344/ed0584ba70f64a46852de2d2f7573e2d/FLAG6a5d88621 [2021-12-18 00:55:34,085 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 00:55:34,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2021-12-18 00:55:34,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9c2a9344/ed0584ba70f64a46852de2d2f7573e2d/FLAG6a5d88621 [2021-12-18 00:55:34,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9c2a9344/ed0584ba70f64a46852de2d2f7573e2d [2021-12-18 00:55:34,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 00:55:34,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 00:55:34,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 00:55:34,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 00:55:34,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 00:55:34,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:55:34" (1/1) ... [2021-12-18 00:55:34,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236fe348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:34, skipping insertion in model container [2021-12-18 00:55:34,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 12:55:34" (1/1) ... [2021-12-18 00:55:34,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 00:55:34,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 00:55:34,854 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_back_harness.i[4498,4511] [2021-12-18 00:55:34,859 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_back_harness.i[4558,4571] [2021-12-18 00:55:35,394 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,394 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,395 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,395 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,396 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,404 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,404 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,405 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,405 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,406 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,407 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,407 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,407 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,585 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:55:35,587 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:55:35,588 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:55:35,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:55:35,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:55:35,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:55:35,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:55:35,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:55:35,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:55:35,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:55:35,681 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:55:35,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:55:35,736 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 00:55:35,754 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_back_harness.i[4498,4511] [2021-12-18 00:55:35,755 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_back_harness.i[4558,4571] [2021-12-18 00:55:35,790 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,791 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,791 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,792 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,793 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,802 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,803 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,803 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,804 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,805 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,806 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,806 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-18 00:55:35,835 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-18 00:55:35,836 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-18 00:55:35,836 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-18 00:55:35,837 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-18 00:55:35,841 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-18 00:55:35,841 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-18 00:55:35,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-18 00:55:35,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-18 00:55:35,843 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-18 00:55:35,843 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-18 00:55:35,859 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-18 00:55:35,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 00:55:36,037 INFO L208 MainTranslator]: Completed translation [2021-12-18 00:55:36,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36 WrapperNode [2021-12-18 00:55:36,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 00:55:36,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 00:55:36,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 00:55:36,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 00:55:36,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,142 INFO L137 Inliner]: procedures = 679, calls = 1046, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2021-12-18 00:55:36,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 00:55:36,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 00:55:36,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 00:55:36,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 00:55:36,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 00:55:36,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 00:55:36,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 00:55:36,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 00:55:36,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (1/1) ... [2021-12-18 00:55:36,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 00:55:36,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:55:36,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 00:55:36,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 00:55:36,285 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-18 00:55:36,285 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-18 00:55:36,285 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2021-12-18 00:55:36,286 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2021-12-18 00:55:36,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 00:55:36,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 00:55:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 00:55:36,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 00:55:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-12-18 00:55:36,287 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-12-18 00:55:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 00:55:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-12-18 00:55:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-12-18 00:55:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 00:55:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 00:55:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 00:55:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 00:55:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-12-18 00:55:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-12-18 00:55:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 00:55:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 00:55:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 00:55:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 00:55:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 00:55:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 00:55:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 00:55:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-18 00:55:36,290 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-18 00:55:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-12-18 00:55:36,290 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-12-18 00:55:36,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 00:55:36,550 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 00:55:36,551 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 00:55:36,834 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 00:55:36,838 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 00:55:36,839 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-18 00:55:36,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:55:36 BoogieIcfgContainer [2021-12-18 00:55:36,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 00:55:36,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 00:55:36,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 00:55:36,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 00:55:36,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 12:55:34" (1/3) ... [2021-12-18 00:55:36,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45295915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:55:36, skipping insertion in model container [2021-12-18 00:55:36,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 12:55:36" (2/3) ... [2021-12-18 00:55:36,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45295915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 12:55:36, skipping insertion in model container [2021-12-18 00:55:36,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 12:55:36" (3/3) ... [2021-12-18 00:55:36,846 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_back_harness.i [2021-12-18 00:55:36,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 00:55:36,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 00:55:36,891 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 00:55:36,902 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 00:55:36,904 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 00:55:36,919 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) [2021-12-18 00:55:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 00:55:36,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:36,926 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] [2021-12-18 00:55:36,926 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1579343520, now seen corresponding path program 1 times [2021-12-18 00:55:36,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:36,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543178785] [2021-12-18 00:55:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:36,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:55:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:55:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:55:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:55:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:55:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 00:55:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:55:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:55:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:55:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:55:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:55:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-18 00:55:37,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543178785] [2021-12-18 00:55:37,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543178785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:55:37,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942456454] [2021-12-18 00:55:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:37,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:55:37,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:55:37,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:55:37,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 00:55:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 00:55:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:55:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-18 00:55:37,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:55:37,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942456454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:55:37,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:55:37,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-18 00:55:37,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710231726] [2021-12-18 00:55:37,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:55:37,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:55:37,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:55:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:55:37,744 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) [2021-12-18 00:55:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:55:37,789 INFO L93 Difference]: Finished difference Result 274 states and 414 transitions. [2021-12-18 00:55:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:55:37,791 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 [2021-12-18 00:55:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:55:37,798 INFO L225 Difference]: With dead ends: 274 [2021-12-18 00:55:37,798 INFO L226 Difference]: Without dead ends: 140 [2021-12-18 00:55:37,801 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 [2021-12-18 00:55:37,803 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 [2021-12-18 00:55:37,803 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] [2021-12-18 00:55:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-18 00:55:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-12-18 00:55:37,831 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) [2021-12-18 00:55:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2021-12-18 00:55:37,833 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 116 [2021-12-18 00:55:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:55:37,834 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2021-12-18 00:55:37,834 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) [2021-12-18 00:55:37,835 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2021-12-18 00:55:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 00:55:37,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:37,836 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] [2021-12-18 00:55:37,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 00:55:38,050 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 [2021-12-18 00:55:38,051 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:38,051 INFO L85 PathProgramCache]: Analyzing trace with hash -183799078, now seen corresponding path program 1 times [2021-12-18 00:55:38,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:38,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077797241] [2021-12-18 00:55:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:38,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:55:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:55:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:55:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:55:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:55:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 00:55:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:55:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:55:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:55:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:55:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:55:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-18 00:55:38,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:38,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077797241] [2021-12-18 00:55:38,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077797241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:55:38,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16493826] [2021-12-18 00:55:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:38,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:55:38,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:55:38,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:55:38,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 00:55:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 00:55:38,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:55:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-18 00:55:38,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:55:38,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16493826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:55:38,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:55:38,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-18 00:55:38,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283915756] [2021-12-18 00:55:38,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:55:38,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:55:38,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:55:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:55:38,542 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) [2021-12-18 00:55:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:55:38,569 INFO L93 Difference]: Finished difference Result 252 states and 345 transitions. [2021-12-18 00:55:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:55:38,570 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 [2021-12-18 00:55:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:55:38,576 INFO L225 Difference]: With dead ends: 252 [2021-12-18 00:55:38,576 INFO L226 Difference]: Without dead ends: 138 [2021-12-18 00:55:38,580 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 [2021-12-18 00:55:38,582 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 [2021-12-18 00:55:38,583 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] [2021-12-18 00:55:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-18 00:55:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-18 00:55:38,600 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) [2021-12-18 00:55:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2021-12-18 00:55:38,605 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 116 [2021-12-18 00:55:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:55:38,607 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2021-12-18 00:55:38,608 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) [2021-12-18 00:55:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2021-12-18 00:55:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 00:55:38,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:38,613 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] [2021-12-18 00:55:38,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 00:55:38,823 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 [2021-12-18 00:55:38,824 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash -543175276, now seen corresponding path program 1 times [2021-12-18 00:55:38,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:38,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202354046] [2021-12-18 00:55:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:38,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:38,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:55:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:55:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:55:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:55:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:55:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 00:55:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:55:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:55:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:55:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:55:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:55:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-18 00:55:39,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:39,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202354046] [2021-12-18 00:55:39,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202354046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:55:39,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110818506] [2021-12-18 00:55:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:39,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:55:39,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:55:39,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:55:39,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 00:55:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 00:55:39,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:55:39,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:55:39,401 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 18 treesize of output 19 [2021-12-18 00:55:40,023 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-18 00:55:40,024 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 22 treesize of output 1 [2021-12-18 00:55:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-18 00:55:40,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:55:40,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110818506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:55:40,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:55:40,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 20 [2021-12-18 00:55:40,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277202426] [2021-12-18 00:55:40,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:55:40,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 00:55:40,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 00:55:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-12-18 00:55:40,075 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) [2021-12-18 00:55:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:55:40,212 INFO L93 Difference]: Finished difference Result 327 states and 442 transitions. [2021-12-18 00:55:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 00:55:40,212 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 [2021-12-18 00:55:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:55:40,215 INFO L225 Difference]: With dead ends: 327 [2021-12-18 00:55:40,215 INFO L226 Difference]: Without dead ends: 213 [2021-12-18 00:55:40,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 129 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-12-18 00:55:40,216 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 56 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:55:40,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 954 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2021-12-18 00:55:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-18 00:55:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 179. [2021-12-18 00:55:40,229 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) [2021-12-18 00:55:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 236 transitions. [2021-12-18 00:55:40,231 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 236 transitions. Word has length 116 [2021-12-18 00:55:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:55:40,231 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 236 transitions. [2021-12-18 00:55:40,231 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) [2021-12-18 00:55:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 236 transitions. [2021-12-18 00:55:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 00:55:40,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:55:40,233 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] [2021-12-18 00:55:40,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 00:55:40,450 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 [2021-12-18 00:55:40,451 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:55:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:55:40,451 INFO L85 PathProgramCache]: Analyzing trace with hash -670206630, now seen corresponding path program 1 times [2021-12-18 00:55:40,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:55:40,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51616875] [2021-12-18 00:55:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:40,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:55:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:55:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:55:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:55:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:55:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:55:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:55:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:55:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 00:55:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:55:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:55:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:55:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:55:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:55:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:55:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-18 00:55:40,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:55:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51616875] [2021-12-18 00:55:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51616875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:55:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584238882] [2021-12-18 00:55:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:55:40,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:55:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:55:40,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:55:40,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 00:55:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:55:40,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 00:55:40,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:55:40,892 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:55:40,893 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 [2021-12-18 00:55:40,904 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:55:40,904 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 [2021-12-18 00:55:41,752 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_2|) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_2| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_2|) 0)))) is different from true [2021-12-18 00:55:42,452 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_3|) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_3|) 0)))) is different from true [2021-12-18 00:55:43,228 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_4|) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_4|) 0)))) is different from true [2021-12-18 00:55:43,939 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_5|) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_5|) 0)))) is different from true [2021-12-18 00:55:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 107 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 12 not checked. [2021-12-18 00:55:55,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:55:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-18 00:55:55,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584238882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:55:55,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:55:55,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 11] total 28 [2021-12-18 00:55:55,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809066528] [2021-12-18 00:55:55,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:55:55,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 00:55:55,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:55:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 00:55:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=471, Unknown=8, NotChecked=188, Total=756 [2021-12-18 00:55:55,430 INFO L87 Difference]: Start difference. First operand 179 states and 236 transitions. Second operand has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 26 states have internal predecessors, (95), 7 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (28), 6 states have call predecessors, (28), 7 states have call successors, (28) [2021-12-18 00:56:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:08,359 INFO L93 Difference]: Finished difference Result 456 states and 637 transitions. [2021-12-18 00:56:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 00:56:08,360 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 26 states have internal predecessors, (95), 7 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (28), 6 states have call predecessors, (28), 7 states have call successors, (28) Word has length 116 [2021-12-18 00:56:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:08,362 INFO L225 Difference]: With dead ends: 456 [2021-12-18 00:56:08,362 INFO L226 Difference]: Without dead ends: 340 [2021-12-18 00:56:08,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 246 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=236, Invalid=1088, Unknown=24, NotChecked=292, Total=1640 [2021-12-18 00:56:08,364 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 266 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 2192 SdHoareTripleChecker+Invalid, 3479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1987 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:08,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 2192 Invalid, 3479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1374 Invalid, 0 Unknown, 1987 Unchecked, 0.8s Time] [2021-12-18 00:56:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-18 00:56:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 251. [2021-12-18 00:56:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 171 states have (on average 1.1695906432748537) internal successors, (200), 174 states have internal predecessors, (200), 58 states have call successors, (58), 20 states have call predecessors, (58), 21 states have return successors, (70), 56 states have call predecessors, (70), 57 states have call successors, (70) [2021-12-18 00:56:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 328 transitions. [2021-12-18 00:56:08,394 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 328 transitions. Word has length 116 [2021-12-18 00:56:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:08,394 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 328 transitions. [2021-12-18 00:56:08,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 26 states have internal predecessors, (95), 7 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (28), 6 states have call predecessors, (28), 7 states have call successors, (28) [2021-12-18 00:56:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 328 transitions. [2021-12-18 00:56:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 00:56:08,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:08,401 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] [2021-12-18 00:56:08,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 00:56:08,601 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 [2021-12-18 00:56:08,601 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:08,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1395986770, now seen corresponding path program 1 times [2021-12-18 00:56:08,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:08,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287708633] [2021-12-18 00:56:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:08,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:56:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:56:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:56:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:56:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:56:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 00:56:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:56:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:56:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:56:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:56:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:56:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-18 00:56:08,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:08,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287708633] [2021-12-18 00:56:08,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287708633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:08,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774616842] [2021-12-18 00:56:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:08,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:08,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:08,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 00:56:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:08,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 00:56:08,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-18 00:56:09,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:56:09,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774616842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:56:09,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:56:09,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-18 00:56:09,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875439514] [2021-12-18 00:56:09,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:56:09,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:56:09,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:09,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:56:09,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:56:09,209 INFO L87 Difference]: Start difference. First operand 251 states and 328 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) [2021-12-18 00:56:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:09,368 INFO L93 Difference]: Finished difference Result 467 states and 606 transitions. [2021-12-18 00:56:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:56:09,369 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 [2021-12-18 00:56:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:09,370 INFO L225 Difference]: With dead ends: 467 [2021-12-18 00:56:09,370 INFO L226 Difference]: Without dead ends: 199 [2021-12-18 00:56:09,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-18 00:56:09,372 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 230 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:09,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 891 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:56:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-18 00:56:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2021-12-18 00:56:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 128 states have internal predecessors, (148), 50 states have call successors, (50), 18 states have call predecessors, (50), 17 states have return successors, (53), 48 states have call predecessors, (53), 49 states have call successors, (53) [2021-12-18 00:56:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 251 transitions. [2021-12-18 00:56:09,382 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 251 transitions. Word has length 116 [2021-12-18 00:56:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:09,382 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 251 transitions. [2021-12-18 00:56:09,383 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) [2021-12-18 00:56:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 251 transitions. [2021-12-18 00:56:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 00:56:09,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:09,384 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] [2021-12-18 00:56:09,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 00:56:09,603 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 [2021-12-18 00:56:09,604 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1369878566, now seen corresponding path program 2 times [2021-12-18 00:56:09,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:09,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118449999] [2021-12-18 00:56:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:09,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:56:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:56:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:56:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:56:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:56:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-18 00:56:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-18 00:56:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-18 00:56:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-18 00:56:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:56:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:56:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-18 00:56:09,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:09,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118449999] [2021-12-18 00:56:09,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118449999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:09,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420848423] [2021-12-18 00:56:09,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:56:09,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:09,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:09,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:09,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 00:56:10,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:56:10,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:56:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-18 00:56:10,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:10,079 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:10,079 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 [2021-12-18 00:56:10,090 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:10,091 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 [2021-12-18 00:56:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 105 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-18 00:56:11,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:56:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-18 00:56:11,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420848423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:56:11,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:56:11,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 12] total 28 [2021-12-18 00:56:11,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752145504] [2021-12-18 00:56:11,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:56:11,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 00:56:11,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 00:56:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-12-18 00:56:11,538 INFO L87 Difference]: Start difference. First operand 195 states and 251 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 10 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-12-18 00:56:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:12,454 INFO L93 Difference]: Finished difference Result 382 states and 502 transitions. [2021-12-18 00:56:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 00:56:12,456 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 10 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 116 [2021-12-18 00:56:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:12,458 INFO L225 Difference]: With dead ends: 382 [2021-12-18 00:56:12,458 INFO L226 Difference]: Without dead ends: 252 [2021-12-18 00:56:12,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 238 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 00:56:12,459 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 232 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:12,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 2615 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1025 Invalid, 0 Unknown, 253 Unchecked, 0.6s Time] [2021-12-18 00:56:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-18 00:56:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 199. [2021-12-18 00:56:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 131 states have internal predecessors, (151), 50 states have call successors, (50), 19 states have call predecessors, (50), 18 states have return successors, (52), 48 states have call predecessors, (52), 49 states have call successors, (52) [2021-12-18 00:56:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 253 transitions. [2021-12-18 00:56:12,478 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 253 transitions. Word has length 116 [2021-12-18 00:56:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:12,478 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 253 transitions. [2021-12-18 00:56:12,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 10 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-12-18 00:56:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 253 transitions. [2021-12-18 00:56:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-18 00:56:12,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:12,480 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] [2021-12-18 00:56:12,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 00:56:12,694 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 [2021-12-18 00:56:12,695 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1492302642, now seen corresponding path program 1 times [2021-12-18 00:56:12,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:12,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773190880] [2021-12-18 00:56:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:12,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:56:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:56:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:56:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:56:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:56:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:56:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-18 00:56:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 00:56:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 00:56:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-18 00:56:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 00:56:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-18 00:56:12,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:12,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773190880] [2021-12-18 00:56:12,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773190880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:12,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277338875] [2021-12-18 00:56:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:12,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:12,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:12,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 00:56:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:13,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 00:56:13,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:13,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:56:13,205 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 00:56:13,205 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 [2021-12-18 00:56:13,211 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 [2021-12-18 00:56:13,214 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 [2021-12-18 00:56:13,285 INFO L354 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2021-12-18 00:56:13,285 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 [2021-12-18 00:56:13,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:56:13,289 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 [2021-12-18 00:56:13,295 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 [2021-12-18 00:56:13,301 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 [2021-12-18 00:56:13,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 00:56:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-18 00:56:38,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:56:38,963 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_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|) 0))) is different from false [2021-12-18 00:56:38,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:56:38,978 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 [2021-12-18 00:56:38,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:56:38,989 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 [2021-12-18 00:56:38,992 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 [2021-12-18 00:56:38,997 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 [2021-12-18 00:56:39,077 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 [2021-12-18 00:56:39,087 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 [2021-12-18 00:56:39,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:56:39,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-12-18 00:56:39,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277338875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:39,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:56:39,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14] total 18 [2021-12-18 00:56:39,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896809699] [2021-12-18 00:56:39,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:56:39,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 00:56:39,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 00:56:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=621, Unknown=1, NotChecked=50, Total=756 [2021-12-18 00:56:39,303 INFO L87 Difference]: Start difference. First operand 199 states and 253 transitions. Second operand has 18 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 8 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-18 00:56:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:43,871 INFO L93 Difference]: Finished difference Result 415 states and 544 transitions. [2021-12-18 00:56:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 00:56:43,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 8 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 118 [2021-12-18 00:56:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:43,873 INFO L225 Difference]: With dead ends: 415 [2021-12-18 00:56:43,873 INFO L226 Difference]: Without dead ends: 250 [2021-12-18 00:56:43,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 212 SyntacticMatches, 23 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=149, Invalid=1185, Unknown=2, NotChecked=70, Total=1406 [2021-12-18 00:56:43,874 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 48 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:43,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1499 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2021-12-18 00:56:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-18 00:56:43,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 194. [2021-12-18 00:56:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 132 states have internal predecessors, (151), 44 states have call successors, (44), 19 states have call predecessors, (44), 20 states have return successors, (49), 42 states have call predecessors, (49), 43 states have call successors, (49) [2021-12-18 00:56:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 244 transitions. [2021-12-18 00:56:43,891 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 244 transitions. Word has length 118 [2021-12-18 00:56:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:43,891 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 244 transitions. [2021-12-18 00:56:43,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 8 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-18 00:56:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 244 transitions. [2021-12-18 00:56:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-18 00:56:43,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:43,893 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] [2021-12-18 00:56:43,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-18 00:56:44,094 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 [2021-12-18 00:56:44,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:44,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1991074974, now seen corresponding path program 1 times [2021-12-18 00:56:44,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:44,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927282570] [2021-12-18 00:56:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:44,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:56:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:56:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:56:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:56:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:56:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 00:56:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-18 00:56:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 00:56:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 00:56:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-18 00:56:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-18 00:56:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-18 00:56:44,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:44,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927282570] [2021-12-18 00:56:44,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927282570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:44,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085563080] [2021-12-18 00:56:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:44,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:44,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:44,322 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:44,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 00:56:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:44,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 00:56:44,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 00:56:44,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:56:44,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085563080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:56:44,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:56:44,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-18 00:56:44,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772407410] [2021-12-18 00:56:44,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:56:44,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:56:44,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:44,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:56:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-18 00:56:44,641 INFO L87 Difference]: Start difference. First operand 194 states and 244 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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) [2021-12-18 00:56:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:44,815 INFO L93 Difference]: Finished difference Result 341 states and 434 transitions. [2021-12-18 00:56:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 00:56:44,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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 118 [2021-12-18 00:56:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:44,817 INFO L225 Difference]: With dead ends: 341 [2021-12-18 00:56:44,817 INFO L226 Difference]: Without dead ends: 197 [2021-12-18 00:56:44,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-18 00:56:44,818 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 213 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:44,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 750 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:56:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-18 00:56:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-12-18 00:56:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 131 states have (on average 1.16793893129771) internal successors, (153), 135 states have internal predecessors, (153), 44 states have call successors, (44), 19 states have call predecessors, (44), 21 states have return successors, (51), 42 states have call predecessors, (51), 43 states have call successors, (51) [2021-12-18 00:56:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 248 transitions. [2021-12-18 00:56:44,826 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 248 transitions. Word has length 118 [2021-12-18 00:56:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:44,826 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 248 transitions. [2021-12-18 00:56:44,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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) [2021-12-18 00:56:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 248 transitions. [2021-12-18 00:56:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 00:56:44,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:44,828 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] [2021-12-18 00:56:44,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 00:56:45,028 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 [2021-12-18 00:56:45,028 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:45,029 INFO L85 PathProgramCache]: Analyzing trace with hash -267467697, now seen corresponding path program 1 times [2021-12-18 00:56:45,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:45,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362239643] [2021-12-18 00:56:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:45,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:56:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:56:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:56:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:56:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:56:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-18 00:56:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-18 00:56:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:56:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-18 00:56:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-18 00:56:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-18 00:56:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-18 00:56:45,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:45,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362239643] [2021-12-18 00:56:45,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362239643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:45,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125265142] [2021-12-18 00:56:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:45,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:45,193 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:45,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 00:56:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 00:56:45,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 00:56:45,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:56:45,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125265142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:56:45,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:56:45,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-12-18 00:56:45,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804619667] [2021-12-18 00:56:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:56:45,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:56:45,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:45,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:56:45,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:56:45,558 INFO L87 Difference]: Start difference. First operand 197 states and 248 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 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) [2021-12-18 00:56:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:45,795 INFO L93 Difference]: Finished difference Result 356 states and 460 transitions. [2021-12-18 00:56:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 00:56:45,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 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 [2021-12-18 00:56:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:45,797 INFO L225 Difference]: With dead ends: 356 [2021-12-18 00:56:45,797 INFO L226 Difference]: Without dead ends: 209 [2021-12-18 00:56:45,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-12-18 00:56:45,801 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 250 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 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 [2021-12-18 00:56:45,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 874 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 00:56:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-18 00:56:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2021-12-18 00:56:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 137 states have internal predecessors, (156), 44 states have call successors, (44), 19 states have call predecessors, (44), 21 states have return successors, (51), 42 states have call predecessors, (51), 43 states have call successors, (51) [2021-12-18 00:56:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 251 transitions. [2021-12-18 00:56:45,842 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 251 transitions. Word has length 120 [2021-12-18 00:56:45,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:45,843 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 251 transitions. [2021-12-18 00:56:45,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 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) [2021-12-18 00:56:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 251 transitions. [2021-12-18 00:56:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-18 00:56:45,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:45,845 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] [2021-12-18 00:56:45,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 00:56:46,065 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 [2021-12-18 00:56:46,065 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:46,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:46,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1914003673, now seen corresponding path program 1 times [2021-12-18 00:56:46,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:46,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026918120] [2021-12-18 00:56:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:46,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:56:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:56:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:56:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:56:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:56:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-18 00:56:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-18 00:56:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-18 00:56:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:56:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:56:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 00:56:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-18 00:56:46,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:46,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026918120] [2021-12-18 00:56:46,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026918120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:46,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599361989] [2021-12-18 00:56:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:46,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:46,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:46,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:46,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 00:56:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-18 00:56:46,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-18 00:56:46,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:56:46,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599361989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:56:46,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:56:46,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-18 00:56:46,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995404202] [2021-12-18 00:56:46,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:56:46,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 00:56:46,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:46,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 00:56:46,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:56:46,519 INFO L87 Difference]: Start difference. First operand 199 states and 251 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-12-18 00:56:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:46,532 INFO L93 Difference]: Finished difference Result 357 states and 464 transitions. [2021-12-18 00:56:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 00:56:46,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 121 [2021-12-18 00:56:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:46,534 INFO L225 Difference]: With dead ends: 357 [2021-12-18 00:56:46,534 INFO L226 Difference]: Without dead ends: 208 [2021-12-18 00:56:46,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 00:56:46,535 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 [2021-12-18 00:56:46,535 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] [2021-12-18 00:56:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-18 00:56:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 200. [2021-12-18 00:56:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 134 states have (on average 1.171641791044776) internal successors, (157), 138 states have internal predecessors, (157), 44 states have call successors, (44), 19 states have call predecessors, (44), 21 states have return successors, (51), 42 states have call predecessors, (51), 43 states have call successors, (51) [2021-12-18 00:56:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 252 transitions. [2021-12-18 00:56:46,543 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 252 transitions. Word has length 121 [2021-12-18 00:56:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:46,543 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 252 transitions. [2021-12-18 00:56:46,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-12-18 00:56:46,543 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 252 transitions. [2021-12-18 00:56:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-18 00:56:46,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:46,545 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:56:46,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 00:56:46,759 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 [2021-12-18 00:56:46,760 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2103576065, now seen corresponding path program 1 times [2021-12-18 00:56:46,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:46,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409809746] [2021-12-18 00:56:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:46,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-18 00:56:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:56:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:56:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:56:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:56:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-18 00:56:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-18 00:56:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:56:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-18 00:56:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:56:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:56:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-18 00:56:46,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409809746] [2021-12-18 00:56:46,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409809746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253507716] [2021-12-18 00:56:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:46,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:46,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:46,953 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:46,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 00:56:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:47,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 00:56:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:47,175 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:47,176 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 [2021-12-18 00:56:47,183 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:47,183 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 [2021-12-18 00:56:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-18 00:56:47,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:56:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-18 00:56:48,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253507716] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:56:48,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:56:48,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 10] total 22 [2021-12-18 00:56:48,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663686656] [2021-12-18 00:56:48,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:56:48,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 00:56:48,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:56:48,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 00:56:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-12-18 00:56:48,272 INFO L87 Difference]: Start difference. First operand 200 states and 252 transitions. Second operand has 22 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 7 states have call successors, (29), 3 states have call predecessors, (29), 8 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-18 00:56:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:56:49,050 INFO L93 Difference]: Finished difference Result 386 states and 501 transitions. [2021-12-18 00:56:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 00:56:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 7 states have call successors, (29), 3 states have call predecessors, (29), 8 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) Word has length 133 [2021-12-18 00:56:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:56:49,052 INFO L225 Difference]: With dead ends: 386 [2021-12-18 00:56:49,052 INFO L226 Difference]: Without dead ends: 240 [2021-12-18 00:56:49,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 282 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 00:56:49,053 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 131 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 00:56:49,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 1924 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 783 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2021-12-18 00:56:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-18 00:56:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 217. [2021-12-18 00:56:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 150 states have (on average 1.18) internal successors, (177), 153 states have internal predecessors, (177), 44 states have call successors, (44), 21 states have call predecessors, (44), 22 states have return successors, (51), 42 states have call predecessors, (51), 43 states have call successors, (51) [2021-12-18 00:56:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 272 transitions. [2021-12-18 00:56:49,065 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 272 transitions. Word has length 133 [2021-12-18 00:56:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:56:49,065 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 272 transitions. [2021-12-18 00:56:49,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 6.4) internal successors, (128), 20 states have internal predecessors, (128), 7 states have call successors, (29), 3 states have call predecessors, (29), 8 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2021-12-18 00:56:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 272 transitions. [2021-12-18 00:56:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-18 00:56:49,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:56:49,068 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, 1] [2021-12-18 00:56:49,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 00:56:49,283 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 [2021-12-18 00:56:49,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:56:49,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:56:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1568033880, now seen corresponding path program 1 times [2021-12-18 00:56:49,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:56:49,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397017510] [2021-12-18 00:56:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:49,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:56:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:56:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:56:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-18 00:56:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:56:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:56:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:56:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:56:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:56:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-18 00:56:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-18 00:56:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-18 00:56:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-18 00:56:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:56:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-18 00:56:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-18 00:56:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-18 00:56:49,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:56:49,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397017510] [2021-12-18 00:56:49,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397017510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:56:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744222106] [2021-12-18 00:56:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:56:49,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:56:49,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:56:49,471 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:56:49,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 00:56:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:56:49,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 00:56:49,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:56:49,722 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:49,722 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 [2021-12-18 00:56:49,733 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:56:49,733 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 [2021-12-18 00:56:51,923 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_3| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_3| 24)) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_3| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_3| 24)) 0)))) is different from true [2021-12-18 00:56:54,018 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.offset_BEFORE_CALL_22| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_29|) (+ |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.offset_BEFORE_CALL_22| 24)) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.offset_BEFORE_CALL_22| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_29|) (+ |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.offset_BEFORE_CALL_22| 24)) 0)))) is different from true [2021-12-18 00:56:58,142 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_34| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_34|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34| 24)) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_34| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_34|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_34| 24)) 0)))) is different from true [2021-12-18 00:57:02,229 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_35| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_35| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_35|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_35| 24)) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_35| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_35| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_35|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_35| 24)) 0)))) is different from true [2021-12-18 00:57:06,310 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_36| 24)) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_36|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_36| 24)) 0)))) is different from true [2021-12-18 00:57:08,382 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_37| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_37| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_37|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_37| 24)) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_37| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_37| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_37|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_37| 24)) 0)))) is different from true [2021-12-18 00:57:10,438 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_38| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_38|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_38| 24)) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_38| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_back_~list#1.base_BEFORE_CALL_38|) (+ |v_ULTIMATE.start_aws_linked_list_back_~list#1.offset_BEFORE_CALL_38| 24)) 0)))) is different from true [2021-12-18 00:57:18,505 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:57:26,650 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:57:34,751 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:57:40,817 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:57:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 45 not checked. [2021-12-18 00:57:40,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:57:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-18 00:57:43,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744222106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:57:43,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:57:43,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20, 12] total 33 [2021-12-18 00:57:43,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744682165] [2021-12-18 00:57:43,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:57:43,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 00:57:43,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:57:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 00:57:43,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=577, Unknown=11, NotChecked=378, Total=1056 [2021-12-18 00:57:43,438 INFO L87 Difference]: Start difference. First operand 217 states and 272 transitions. Second operand has 33 states, 33 states have (on average 4.333333333333333) internal successors, (143), 31 states have internal predecessors, (143), 8 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2021-12-18 00:58:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:17,095 INFO L93 Difference]: Finished difference Result 416 states and 552 transitions. [2021-12-18 00:58:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 00:58:17,095 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.333333333333333) internal successors, (143), 31 states have internal predecessors, (143), 8 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) Word has length 135 [2021-12-18 00:58:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:17,097 INFO L225 Difference]: With dead ends: 416 [2021-12-18 00:58:17,097 INFO L226 Difference]: Without dead ends: 253 [2021-12-18 00:58:17,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 278 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 85.7s TimeCoverageRelationStatistics Valid=436, Invalid=1917, Unknown=27, NotChecked=700, Total=3080 [2021-12-18 00:58:17,098 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 208 mSDsluCounter, 2023 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 3650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2254 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:17,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 2198 Invalid, 3650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1344 Invalid, 0 Unknown, 2254 Unchecked, 0.7s Time] [2021-12-18 00:58:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-18 00:58:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 219. [2021-12-18 00:58:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 151 states have (on average 1.1721854304635762) internal successors, (177), 154 states have internal predecessors, (177), 45 states have call successors, (45), 21 states have call predecessors, (45), 22 states have return successors, (52), 43 states have call predecessors, (52), 44 states have call successors, (52) [2021-12-18 00:58:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 274 transitions. [2021-12-18 00:58:17,109 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 274 transitions. Word has length 135 [2021-12-18 00:58:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:17,109 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 274 transitions. [2021-12-18 00:58:17,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.333333333333333) internal successors, (143), 31 states have internal predecessors, (143), 8 states have call successors, (33), 9 states have call predecessors, (33), 11 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2021-12-18 00:58:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 274 transitions. [2021-12-18 00:58:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-18 00:58:17,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:17,111 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1] [2021-12-18 00:58:17,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:17,311 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 [2021-12-18 00:58:17,312 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1816451496, now seen corresponding path program 1 times [2021-12-18 00:58:17,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:17,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820289570] [2021-12-18 00:58:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:17,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:58:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:58:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:58:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:58:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:58:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:58:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:58:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-18 00:58:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:58:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-18 00:58:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-18 00:58:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-18 00:58:17,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820289570] [2021-12-18 00:58:17,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820289570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807623916] [2021-12-18 00:58:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:17,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:17,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:17,504 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:17,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 00:58:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:17,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 00:58:17,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:17,736 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:58:17,737 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 [2021-12-18 00:58:17,749 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:58:17,749 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 [2021-12-18 00:58:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 128 proven. 7 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-18 00:58:18,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:58:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-12-18 00:58:19,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807623916] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:58:19,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:58:19,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 12] total 31 [2021-12-18 00:58:19,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759984566] [2021-12-18 00:58:19,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:58:19,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 00:58:19,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:19,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 00:58:19,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-12-18 00:58:19,139 INFO L87 Difference]: Start difference. First operand 219 states and 274 transitions. Second operand has 31 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (35), 9 states have call predecessors, (35), 11 states have call successors, (35) [2021-12-18 00:58:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:20,123 INFO L93 Difference]: Finished difference Result 398 states and 496 transitions. [2021-12-18 00:58:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 00:58:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (35), 9 states have call predecessors, (35), 11 states have call successors, (35) Word has length 132 [2021-12-18 00:58:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:20,125 INFO L225 Difference]: With dead ends: 398 [2021-12-18 00:58:20,125 INFO L226 Difference]: Without dead ends: 235 [2021-12-18 00:58:20,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=323, Invalid=2329, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 00:58:20,126 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 114 mSDsluCounter, 2816 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2973 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:20,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 2973 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 593 Invalid, 0 Unknown, 231 Unchecked, 0.3s Time] [2021-12-18 00:58:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-18 00:58:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2021-12-18 00:58:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 158 states have (on average 1.1645569620253164) internal successors, (184), 161 states have internal predecessors, (184), 45 states have call successors, (45), 22 states have call predecessors, (45), 23 states have return successors, (53), 43 states have call predecessors, (53), 44 states have call successors, (53) [2021-12-18 00:58:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 282 transitions. [2021-12-18 00:58:20,139 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 282 transitions. Word has length 132 [2021-12-18 00:58:20,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:20,139 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 282 transitions. [2021-12-18 00:58:20,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 11 states have call successors, (35), 4 states have call predecessors, (35), 9 states have return successors, (35), 9 states have call predecessors, (35), 11 states have call successors, (35) [2021-12-18 00:58:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 282 transitions. [2021-12-18 00:58:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-18 00:58:20,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:20,140 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:58:20,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:20,358 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 [2021-12-18 00:58:20,359 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:20,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1254610068, now seen corresponding path program 1 times [2021-12-18 00:58:20,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:20,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609149290] [2021-12-18 00:58:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:20,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-18 00:58:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:58:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:58:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:58:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:58:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 00:58:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 00:58:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:58:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-18 00:58:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-18 00:58:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-18 00:58:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-18 00:58:20,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609149290] [2021-12-18 00:58:20,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609149290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616808126] [2021-12-18 00:58:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:20,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:20,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:20,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 00:58:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 00:58:20,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-18 00:58:21,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:58:21,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616808126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:58:21,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:58:21,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-12-18 00:58:21,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586397716] [2021-12-18 00:58:21,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:58:21,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 00:58:21,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:21,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 00:58:21,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:58:21,014 INFO L87 Difference]: Start difference. First operand 227 states and 282 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 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) [2021-12-18 00:58:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:21,213 INFO L93 Difference]: Finished difference Result 387 states and 482 transitions. [2021-12-18 00:58:21,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:58:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 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 138 [2021-12-18 00:58:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:21,215 INFO L225 Difference]: With dead ends: 387 [2021-12-18 00:58:21,215 INFO L226 Difference]: Without dead ends: 224 [2021-12-18 00:58:21,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-18 00:58:21,216 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 227 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:21,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 869 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:58:21,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-18 00:58:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-12-18 00:58:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 156 states have (on average 1.1602564102564104) internal successors, (181), 158 states have internal predecessors, (181), 45 states have call successors, (45), 22 states have call predecessors, (45), 22 states have return successors, (51), 43 states have call predecessors, (51), 44 states have call successors, (51) [2021-12-18 00:58:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 277 transitions. [2021-12-18 00:58:21,225 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 277 transitions. Word has length 138 [2021-12-18 00:58:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:21,225 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 277 transitions. [2021-12-18 00:58:21,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 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) [2021-12-18 00:58:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 277 transitions. [2021-12-18 00:58:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-18 00:58:21,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:21,227 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:58:21,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:21,444 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 [2021-12-18 00:58:21,445 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash -166539555, now seen corresponding path program 1 times [2021-12-18 00:58:21,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:21,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256452262] [2021-12-18 00:58:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:21,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-18 00:58:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:58:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:58:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:58:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:58:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-18 00:58:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 00:58:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-18 00:58:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-18 00:58:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:58:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-18 00:58:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-18 00:58:21,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:21,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256452262] [2021-12-18 00:58:21,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256452262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567077775] [2021-12-18 00:58:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:21,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:21,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:21,668 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:21,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 00:58:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:21,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 00:58:21,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:21,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:58:22,115 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 00:58:22,115 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 [2021-12-18 00:58:22,124 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 [2021-12-18 00:58:22,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:58:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:22,176 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:58:22,176 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 1 case distinctions, treesize of input 17 treesize of output 25 [2021-12-18 00:58:22,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:22,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2021-12-18 00:58:22,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:22,232 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 16 treesize of output 20 [2021-12-18 00:58:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 127 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-18 00:58:22,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:58:23,281 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1524 (Array Int Int)) (v_ArrVal_1523 (Array Int Int)) (v_ArrVal_1521 Int)) (not (= (+ |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset| 16) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1524) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1523) |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_1521)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|)))) is different from false [2021-12-18 00:58:23,301 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_11| Int) (v_ArrVal_1524 (Array Int Int)) (v_ArrVal_1523 (Array Int Int)) (v_ArrVal_1521 Int) (v_ArrVal_1519 (Array Int Int))) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_11|) (not (= (+ |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset| 16) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1519))) (store (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_11| v_ArrVal_1524) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_11| v_ArrVal_1523) |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_1521))) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|))))) is different from false [2021-12-18 00:58:23,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:58:23,329 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 1 case distinctions, treesize of input 48 treesize of output 41 [2021-12-18 00:58:23,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:58:23,346 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 1651 treesize of output 1637 [2021-12-18 00:58:23,355 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 2086 treesize of output 2022 [2021-12-18 00:58:23,365 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 2262 treesize of output 2226 [2021-12-18 00:58:23,376 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 2226 treesize of output 2218 [2021-12-18 00:58:23,690 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 [2021-12-18 00:58:23,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:58:23,727 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 57 treesize of output 59 [2021-12-18 00:58:23,788 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 [2021-12-18 00:58:23,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:58:23,810 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 27 treesize of output 31 [2021-12-18 00:58:24,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567077775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:24,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:58:24,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 20 [2021-12-18 00:58:24,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384749639] [2021-12-18 00:58:24,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:58:24,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 00:58:24,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:24,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 00:58:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=724, Unknown=2, NotChecked=110, Total=930 [2021-12-18 00:58:24,023 INFO L87 Difference]: Start difference. First operand 224 states and 277 transitions. Second operand has 20 states, 19 states have (on average 7.105263157894737) internal successors, (135), 19 states have internal predecessors, (135), 8 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2021-12-18 00:58:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:24,335 INFO L93 Difference]: Finished difference Result 453 states and 561 transitions. [2021-12-18 00:58:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 00:58:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 7.105263157894737) internal successors, (135), 19 states have internal predecessors, (135), 8 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 149 [2021-12-18 00:58:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:24,337 INFO L225 Difference]: With dead ends: 453 [2021-12-18 00:58:24,337 INFO L226 Difference]: Without dead ends: 270 [2021-12-18 00:58:24,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 288 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=1336, Unknown=2, NotChecked=150, Total=1640 [2021-12-18 00:58:24,339 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 48 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:24,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1851 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 299 Unchecked, 0.1s Time] [2021-12-18 00:58:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-18 00:58:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2021-12-18 00:58:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 189 states have (on average 1.1481481481481481) internal successors, (217), 191 states have internal predecessors, (217), 52 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (57), 49 states have call predecessors, (57), 51 states have call successors, (57) [2021-12-18 00:58:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 326 transitions. [2021-12-18 00:58:24,349 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 326 transitions. Word has length 149 [2021-12-18 00:58:24,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:24,351 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 326 transitions. [2021-12-18 00:58:24,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 7.105263157894737) internal successors, (135), 19 states have internal predecessors, (135), 8 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2021-12-18 00:58:24,352 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 326 transitions. [2021-12-18 00:58:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-18 00:58:24,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:24,354 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-18 00:58:24,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:24,572 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 [2021-12-18 00:58:24,572 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:24,573 INFO L85 PathProgramCache]: Analyzing trace with hash 507664470, now seen corresponding path program 2 times [2021-12-18 00:58:24,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:24,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847540481] [2021-12-18 00:58:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:24,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:58:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:58:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:58:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:58:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:58:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:24,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 00:58:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:25,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-18 00:58:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:25,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:25,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-18 00:58:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:25,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-18 00:58:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:25,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:25,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-18 00:58:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:25,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-18 00:58:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-18 00:58:25,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:25,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847540481] [2021-12-18 00:58:25,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847540481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:25,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4516041] [2021-12-18 00:58:25,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:58:25,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:25,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:25,048 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:25,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 00:58:25,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:58:25,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:58:25,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-18 00:58:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:25,309 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:58:25,310 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 [2021-12-18 00:58:25,319 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:58:25,320 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 [2021-12-18 00:58:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 112 proven. 30 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-18 00:58:26,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:58:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-18 00:58:27,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4516041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:58:27,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:58:27,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 12] total 39 [2021-12-18 00:58:27,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627020648] [2021-12-18 00:58:27,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:58:27,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 00:58:27,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:27,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 00:58:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1352, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 00:58:27,268 INFO L87 Difference]: Start difference. First operand 267 states and 326 transitions. Second operand has 39 states, 38 states have (on average 4.578947368421052) internal successors, (174), 35 states have internal predecessors, (174), 15 states have call successors, (45), 4 states have call predecessors, (45), 9 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2021-12-18 00:58:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:28,932 INFO L93 Difference]: Finished difference Result 487 states and 602 transitions. [2021-12-18 00:58:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-18 00:58:28,933 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.578947368421052) internal successors, (174), 35 states have internal predecessors, (174), 15 states have call successors, (45), 4 states have call predecessors, (45), 9 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) Word has length 148 [2021-12-18 00:58:28,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:28,934 INFO L225 Difference]: With dead ends: 487 [2021-12-18 00:58:28,934 INFO L226 Difference]: Without dead ends: 312 [2021-12-18 00:58:28,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 310 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=596, Invalid=5256, Unknown=0, NotChecked=0, Total=5852 [2021-12-18 00:58:28,936 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 203 mSDsluCounter, 3364 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 3534 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:28,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 3534 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1261 Invalid, 0 Unknown, 338 Unchecked, 0.7s Time] [2021-12-18 00:58:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-18 00:58:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 280. [2021-12-18 00:58:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 199 states have (on average 1.170854271356784) internal successors, (233), 202 states have internal predecessors, (233), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (56), 51 states have call predecessors, (56), 53 states have call successors, (56) [2021-12-18 00:58:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 343 transitions. [2021-12-18 00:58:28,949 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 343 transitions. Word has length 148 [2021-12-18 00:58:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:28,949 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 343 transitions. [2021-12-18 00:58:28,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.578947368421052) internal successors, (174), 35 states have internal predecessors, (174), 15 states have call successors, (45), 4 states have call predecessors, (45), 9 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2021-12-18 00:58:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 343 transitions. [2021-12-18 00:58:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-18 00:58:28,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:28,951 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 00:58:28,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:29,173 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 [2021-12-18 00:58:29,173 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:29,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2065521512, now seen corresponding path program 1 times [2021-12-18 00:58:29,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:29,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746296565] [2021-12-18 00:58:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:29,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-18 00:58:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:58:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:58:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:58:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:58:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:58:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-18 00:58:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-18 00:58:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-18 00:58:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-18 00:58:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-18 00:58:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-18 00:58:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-12-18 00:58:29,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746296565] [2021-12-18 00:58:29,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746296565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741983509] [2021-12-18 00:58:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:29,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:29,430 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:29,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 00:58:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:29,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 00:58:29,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-18 00:58:29,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:58:29,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741983509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:58:29,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:58:29,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-12-18 00:58:29,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205807797] [2021-12-18 00:58:29,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:58:29,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 00:58:29,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:29,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 00:58:29,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:58:29,965 INFO L87 Difference]: Start difference. First operand 280 states and 343 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-18 00:58:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:30,161 INFO L93 Difference]: Finished difference Result 503 states and 631 transitions. [2021-12-18 00:58:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 00:58:30,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 175 [2021-12-18 00:58:30,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:30,163 INFO L225 Difference]: With dead ends: 503 [2021-12-18 00:58:30,163 INFO L226 Difference]: Without dead ends: 320 [2021-12-18 00:58:30,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-18 00:58:30,164 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 17 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:30,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1039 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2021-12-18 00:58:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-18 00:58:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 292. [2021-12-18 00:58:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 209 states have (on average 1.1770334928229664) internal successors, (246), 213 states have internal predecessors, (246), 54 states have call successors, (54), 26 states have call predecessors, (54), 28 states have return successors, (60), 52 states have call predecessors, (60), 53 states have call successors, (60) [2021-12-18 00:58:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 360 transitions. [2021-12-18 00:58:30,177 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 360 transitions. Word has length 175 [2021-12-18 00:58:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:30,178 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 360 transitions. [2021-12-18 00:58:30,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-18 00:58:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 360 transitions. [2021-12-18 00:58:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-18 00:58:30,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:30,179 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-18 00:58:30,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:30,392 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 [2021-12-18 00:58:30,392 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash 444308668, now seen corresponding path program 1 times [2021-12-18 00:58:30,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:30,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163486541] [2021-12-18 00:58:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:30,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:58:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:58:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:58:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:58:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:58:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:58:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-18 00:58:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-18 00:58:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-18 00:58:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-18 00:58:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-18 00:58:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-18 00:58:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-12-18 00:58:30,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:30,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163486541] [2021-12-18 00:58:30,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163486541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:30,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369611861] [2021-12-18 00:58:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:30,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:30,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:30,590 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:30,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 00:58:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:30,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 00:58:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-18 00:58:31,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:58:31,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369611861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:58:31,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:58:31,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-18 00:58:31,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278957704] [2021-12-18 00:58:31,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:58:31,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 00:58:31,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:31,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 00:58:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:58:31,053 INFO L87 Difference]: Start difference. First operand 292 states and 360 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-18 00:58:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:31,072 INFO L93 Difference]: Finished difference Result 506 states and 640 transitions. [2021-12-18 00:58:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:58:31,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 177 [2021-12-18 00:58:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:31,074 INFO L225 Difference]: With dead ends: 506 [2021-12-18 00:58:31,074 INFO L226 Difference]: Without dead ends: 305 [2021-12-18 00:58:31,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:58:31,075 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 0 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:31,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 710 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:58:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-18 00:58:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 300. [2021-12-18 00:58:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 215 states have (on average 1.1674418604651162) internal successors, (251), 219 states have internal predecessors, (251), 54 states have call successors, (54), 26 states have call predecessors, (54), 30 states have return successors, (64), 54 states have call predecessors, (64), 53 states have call successors, (64) [2021-12-18 00:58:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 369 transitions. [2021-12-18 00:58:31,087 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 369 transitions. Word has length 177 [2021-12-18 00:58:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:31,088 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 369 transitions. [2021-12-18 00:58:31,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-18 00:58:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 369 transitions. [2021-12-18 00:58:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-18 00:58:31,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:31,089 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-18 00:58:31,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:31,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 00:58:31,307 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:31,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1868351124, now seen corresponding path program 1 times [2021-12-18 00:58:31,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:31,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218846982] [2021-12-18 00:58:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:31,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:58:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:58:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:58:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:58:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:58:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:58:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-18 00:58:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-18 00:58:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 00:58:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-18 00:58:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-18 00:58:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-18 00:58:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-18 00:58:31,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:31,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218846982] [2021-12-18 00:58:31,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218846982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:31,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526992851] [2021-12-18 00:58:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:31,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:31,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:31,442 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:31,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 00:58:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:31,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 00:58:31,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 00:58:31,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 00:58:31,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526992851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:58:31,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 00:58:31,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-12-18 00:58:31,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846860872] [2021-12-18 00:58:31,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:58:31,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 00:58:31,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 00:58:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 00:58:31,870 INFO L87 Difference]: Start difference. First operand 300 states and 369 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-18 00:58:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:31,890 INFO L93 Difference]: Finished difference Result 507 states and 639 transitions. [2021-12-18 00:58:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 00:58:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 171 [2021-12-18 00:58:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:31,892 INFO L225 Difference]: With dead ends: 507 [2021-12-18 00:58:31,892 INFO L226 Difference]: Without dead ends: 296 [2021-12-18 00:58:31,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 00:58:31,894 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 2 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:31,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 516 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 00:58:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-18 00:58:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 291. [2021-12-18 00:58:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 209 states have (on average 1.138755980861244) internal successors, (238), 212 states have internal predecessors, (238), 53 states have call successors, (53), 26 states have call predecessors, (53), 28 states have return successors, (58), 52 states have call predecessors, (58), 52 states have call successors, (58) [2021-12-18 00:58:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 349 transitions. [2021-12-18 00:58:31,905 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 349 transitions. Word has length 171 [2021-12-18 00:58:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:31,905 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 349 transitions. [2021-12-18 00:58:31,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-18 00:58:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 349 transitions. [2021-12-18 00:58:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-18 00:58:31,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:31,907 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-12-18 00:58:31,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:32,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:32,122 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:32,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:32,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1066037000, now seen corresponding path program 1 times [2021-12-18 00:58:32,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:32,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454943288] [2021-12-18 00:58:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:32,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:58:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:58:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:58:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:58:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:58:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:58:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:58:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:58:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-18 00:58:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:58:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-18 00:58:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-18 00:58:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 69 proven. 11 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-12-18 00:58:32,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:32,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454943288] [2021-12-18 00:58:32,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454943288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:32,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61797966] [2021-12-18 00:58:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:32,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:32,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:32,491 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:32,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 00:58:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-18 00:58:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:32,783 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:58:32,784 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 [2021-12-18 00:58:32,793 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:58:32,793 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 [2021-12-18 00:58:33,734 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_12| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_12| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_12|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_12|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_12| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_12| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_12|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_12|) 0)))) is different from true [2021-12-18 00:58:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 149 proven. 46 refuted. 0 times theorem prover too weak. 74 trivial. 14 not checked. [2021-12-18 00:58:35,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:58:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-18 00:58:36,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61797966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:58:36,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:58:36,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 17] total 47 [2021-12-18 00:58:36,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825997014] [2021-12-18 00:58:36,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:58:36,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 00:58:36,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:36,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 00:58:36,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1907, Unknown=1, NotChecked=88, Total=2162 [2021-12-18 00:58:36,151 INFO L87 Difference]: Start difference. First operand 291 states and 349 transitions. Second operand has 47 states, 46 states have (on average 4.239130434782608) internal successors, (195), 45 states have internal predecessors, (195), 18 states have call successors, (46), 4 states have call predecessors, (46), 11 states have return successors, (47), 18 states have call predecessors, (47), 17 states have call successors, (47) [2021-12-18 00:58:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:58:49,463 INFO L93 Difference]: Finished difference Result 487 states and 617 transitions. [2021-12-18 00:58:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 00:58:49,464 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.239130434782608) internal successors, (195), 45 states have internal predecessors, (195), 18 states have call successors, (46), 4 states have call predecessors, (46), 11 states have return successors, (47), 18 states have call predecessors, (47), 17 states have call successors, (47) Word has length 172 [2021-12-18 00:58:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:58:49,466 INFO L225 Difference]: With dead ends: 487 [2021-12-18 00:58:49,466 INFO L226 Difference]: Without dead ends: 355 [2021-12-18 00:58:49,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 347 SyntacticMatches, 20 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=504, Invalid=5040, Unknown=10, NotChecked=146, Total=5700 [2021-12-18 00:58:49,468 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 216 mSDsluCounter, 4192 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 4392 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 875 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 00:58:49,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 4392 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1698 Invalid, 0 Unknown, 875 Unchecked, 0.8s Time] [2021-12-18 00:58:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-18 00:58:49,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 302. [2021-12-18 00:58:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 217 states have (on average 1.1428571428571428) internal successors, (248), 222 states have internal predecessors, (248), 54 states have call successors, (54), 27 states have call predecessors, (54), 30 states have return successors, (61), 52 states have call predecessors, (61), 53 states have call successors, (61) [2021-12-18 00:58:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 363 transitions. [2021-12-18 00:58:49,482 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 363 transitions. Word has length 172 [2021-12-18 00:58:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:58:49,482 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 363 transitions. [2021-12-18 00:58:49,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.239130434782608) internal successors, (195), 45 states have internal predecessors, (195), 18 states have call successors, (46), 4 states have call predecessors, (46), 11 states have return successors, (47), 18 states have call predecessors, (47), 17 states have call successors, (47) [2021-12-18 00:58:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 363 transitions. [2021-12-18 00:58:49,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-18 00:58:49,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:58:49,484 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-18 00:58:49,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 00:58:49,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:49,684 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:58:49,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:58:49,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1824249692, now seen corresponding path program 1 times [2021-12-18 00:58:49,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:58:49,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31036564] [2021-12-18 00:58:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:49,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:58:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:58:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:58:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-18 00:58:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:58:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-18 00:58:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:58:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-18 00:58:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:58:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:58:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-18 00:58:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:50,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:50,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-18 00:58:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:50,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-18 00:58:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:50,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:58:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:50,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-18 00:58:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-18 00:58:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:50,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:58:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-12-18 00:58:50,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:58:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31036564] [2021-12-18 00:58:50,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31036564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:58:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018691617] [2021-12-18 00:58:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:58:50,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:58:50,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:58:50,163 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:58:50,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 00:58:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:58:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-18 00:58:50,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:58:50,574 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:58:50,574 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 [2021-12-18 00:58:50,584 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:58:50,585 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 [2021-12-18 00:58:51,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:58:51,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:58:51,958 INFO L354 Elim1Store]: treesize reduction 118, result has 0.8 percent of original size [2021-12-18 00:58:51,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 54 treesize of output 1 [2021-12-18 00:58:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 187 proven. 35 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-18 00:58:52,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:58:53,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:58:53,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:58:53,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 1257 treesize of output 1121 [2021-12-18 00:58:53,549 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 1321 treesize of output 1289 [2021-12-18 00:58:53,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:58:53,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:58:53,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 1431 treesize of output 1455 [2021-12-18 00:58:53,622 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 1281 treesize of output 1261 [2021-12-18 00:58:53,641 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 1267 treesize of output 1235 [2021-12-18 00:58:53,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:58:53,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 00:58:53,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 1341 treesize of output 1309 [2021-12-18 00:58:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-12-18 00:58:56,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018691617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:58:56,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:58:56,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 20] total 54 [2021-12-18 00:58:56,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53779787] [2021-12-18 00:58:56,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:58:56,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 00:58:56,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:58:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 00:58:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2658, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 00:58:56,352 INFO L87 Difference]: Start difference. First operand 302 states and 363 transitions. Second operand has 54 states, 49 states have (on average 4.36734693877551) internal successors, (214), 51 states have internal predecessors, (214), 25 states have call successors, (48), 4 states have call predecessors, (48), 11 states have return successors, (47), 21 states have call predecessors, (47), 25 states have call successors, (47) [2021-12-18 00:59:00,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:00,658 INFO L93 Difference]: Finished difference Result 874 states and 1096 transitions. [2021-12-18 00:59:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-18 00:59:00,659 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 49 states have (on average 4.36734693877551) internal successors, (214), 51 states have internal predecessors, (214), 25 states have call successors, (48), 4 states have call predecessors, (48), 11 states have return successors, (47), 21 states have call predecessors, (47), 25 states have call successors, (47) Word has length 178 [2021-12-18 00:59:00,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:00,661 INFO L225 Difference]: With dead ends: 874 [2021-12-18 00:59:00,661 INFO L226 Difference]: Without dead ends: 625 [2021-12-18 00:59:00,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 369 SyntacticMatches, 12 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=859, Invalid=10271, Unknown=0, NotChecked=0, Total=11130 [2021-12-18 00:59:00,665 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 678 mSDsluCounter, 6246 mSDsCounter, 0 mSdLazyCounter, 3594 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 6501 SdHoareTripleChecker+Invalid, 4349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 3594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:00,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 6501 Invalid, 4349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 3594 Invalid, 0 Unknown, 312 Unchecked, 2.4s Time] [2021-12-18 00:59:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-18 00:59:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 570. [2021-12-18 00:59:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 417 states have (on average 1.1558752997601918) internal successors, (482), 428 states have internal predecessors, (482), 96 states have call successors, (96), 47 states have call predecessors, (96), 56 states have return successors, (133), 94 states have call predecessors, (133), 94 states have call successors, (133) [2021-12-18 00:59:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 711 transitions. [2021-12-18 00:59:00,693 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 711 transitions. Word has length 178 [2021-12-18 00:59:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:00,693 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 711 transitions. [2021-12-18 00:59:00,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 49 states have (on average 4.36734693877551) internal successors, (214), 51 states have internal predecessors, (214), 25 states have call successors, (48), 4 states have call predecessors, (48), 11 states have return successors, (47), 21 states have call predecessors, (47), 25 states have call successors, (47) [2021-12-18 00:59:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 711 transitions. [2021-12-18 00:59:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-18 00:59:00,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:00,695 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2021-12-18 00:59:00,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:00,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:00,913 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:00,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1540972609, now seen corresponding path program 2 times [2021-12-18 00:59:00,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:00,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866413235] [2021-12-18 00:59:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:00,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-18 00:59:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-18 00:59:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-18 00:59:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 00:59:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 00:59:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:59:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-18 00:59:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-18 00:59:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:59:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-18 00:59:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-18 00:59:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-18 00:59:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-18 00:59:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 41 proven. 79 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-12-18 00:59:01,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:01,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866413235] [2021-12-18 00:59:01,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866413235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:01,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060363528] [2021-12-18 00:59:01,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 00:59:01,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:01,845 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:01,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 00:59:02,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 00:59:02,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 00:59:02,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-18 00:59:02,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:02,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 00:59:02,357 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 00:59:02,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 00:59:02,369 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 0 case distinctions, treesize of input 14 treesize of output 14 [2021-12-18 00:59:02,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 00:59:02,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:02,450 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-18 00:59:02,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2021-12-18 00:59:02,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:02,459 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 00:59:02,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 00:59:02,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:02,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:02,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2021-12-18 00:59:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 00:59:02,529 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 23 treesize of output 25 [2021-12-18 00:59:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 201 proven. 28 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-18 00:59:04,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:04,657 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 45 treesize of output 29 [2021-12-18 00:59:05,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060363528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:05,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 00:59:05,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 39 [2021-12-18 00:59:05,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150451355] [2021-12-18 00:59:05,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 00:59:05,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 00:59:05,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:05,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 00:59:05,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1442, Unknown=2, NotChecked=0, Total=1560 [2021-12-18 00:59:05,493 INFO L87 Difference]: Start difference. First operand 570 states and 711 transitions. Second operand has 39 states, 39 states have (on average 4.333333333333333) internal successors, (169), 35 states have internal predecessors, (169), 14 states have call successors, (36), 4 states have call predecessors, (36), 10 states have return successors, (36), 15 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-18 00:59:08,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:08,972 INFO L93 Difference]: Finished difference Result 1237 states and 1652 transitions. [2021-12-18 00:59:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-18 00:59:08,973 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.333333333333333) internal successors, (169), 35 states have internal predecessors, (169), 14 states have call successors, (36), 4 states have call predecessors, (36), 10 states have return successors, (36), 15 states have call predecessors, (36), 14 states have call successors, (36) Word has length 187 [2021-12-18 00:59:08,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:08,976 INFO L225 Difference]: With dead ends: 1237 [2021-12-18 00:59:08,977 INFO L226 Difference]: Without dead ends: 837 [2021-12-18 00:59:08,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 306 SyntacticMatches, 16 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=483, Invalid=5831, Unknown=6, NotChecked=0, Total=6320 [2021-12-18 00:59:08,980 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 233 mSDsluCounter, 5065 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 5361 SdHoareTripleChecker+Invalid, 4789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1062 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:08,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 5361 Invalid, 4789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 3455 Invalid, 0 Unknown, 1062 Unchecked, 2.0s Time] [2021-12-18 00:59:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-12-18 00:59:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 663. [2021-12-18 00:59:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 483 states have (on average 1.1366459627329193) internal successors, (549), 493 states have internal predecessors, (549), 117 states have call successors, (117), 50 states have call predecessors, (117), 62 states have return successors, (166), 119 states have call predecessors, (166), 115 states have call successors, (166) [2021-12-18 00:59:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 832 transitions. [2021-12-18 00:59:09,057 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 832 transitions. Word has length 187 [2021-12-18 00:59:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:09,057 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 832 transitions. [2021-12-18 00:59:09,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.333333333333333) internal successors, (169), 35 states have internal predecessors, (169), 14 states have call successors, (36), 4 states have call predecessors, (36), 10 states have return successors, (36), 15 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-18 00:59:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 832 transitions. [2021-12-18 00:59:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-18 00:59:09,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:09,060 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-12-18 00:59:09,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:09,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:09,276 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:09,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1705634565, now seen corresponding path program 1 times [2021-12-18 00:59:09,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:09,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756558121] [2021-12-18 00:59:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:09,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-18 00:59:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-18 00:59:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-18 00:59:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 00:59:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-18 00:59:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:59:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-18 00:59:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-18 00:59:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:59:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-18 00:59:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-18 00:59:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-18 00:59:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-18 00:59:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-12-18 00:59:09,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:09,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756558121] [2021-12-18 00:59:09,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756558121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:09,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190232074] [2021-12-18 00:59:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:09,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:09,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:09,636 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:09,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 00:59:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:09,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 165 conjunts are in the unsatisfiable core [2021-12-18 00:59:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:09,965 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:09,965 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 [2021-12-18 00:59:09,974 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:09,975 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 [2021-12-18 00:59:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 169 proven. 75 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-18 00:59:13,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:25,113 WARN L227 SmtUtils]: Spent 10.11s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:59:35,696 WARN L227 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 00:59:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 61 proven. 94 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-18 00:59:39,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190232074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 00:59:39,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 00:59:39,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 31, 26] total 64 [2021-12-18 00:59:39,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084593376] [2021-12-18 00:59:39,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 00:59:39,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 00:59:39,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 00:59:39,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3775, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 00:59:39,693 INFO L87 Difference]: Start difference. First operand 663 states and 832 transitions. Second operand has 64 states, 61 states have (on average 3.3442622950819674) internal successors, (204), 56 states have internal predecessors, (204), 21 states have call successors, (52), 4 states have call predecessors, (52), 14 states have return successors, (52), 22 states have call predecessors, (52), 21 states have call successors, (52) [2021-12-18 00:59:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:45,806 INFO L93 Difference]: Finished difference Result 1148 states and 1467 transitions. [2021-12-18 00:59:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-18 00:59:45,807 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 3.3442622950819674) internal successors, (204), 56 states have internal predecessors, (204), 21 states have call successors, (52), 4 states have call predecessors, (52), 14 states have return successors, (52), 22 states have call predecessors, (52), 21 states have call successors, (52) Word has length 183 [2021-12-18 00:59:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:45,809 INFO L225 Difference]: With dead ends: 1148 [2021-12-18 00:59:45,809 INFO L226 Difference]: Without dead ends: 692 [2021-12-18 00:59:45,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 357 SyntacticMatches, 13 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3532 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=1052, Invalid=13228, Unknown=0, NotChecked=0, Total=14280 [2021-12-18 00:59:45,811 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 258 mSDsluCounter, 4930 mSDsCounter, 0 mSdLazyCounter, 2726 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 5109 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:45,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 5109 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2726 Invalid, 0 Unknown, 763 Unchecked, 1.8s Time] [2021-12-18 00:59:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-12-18 00:59:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 602. [2021-12-18 00:59:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 438 states have (on average 1.143835616438356) internal successors, (501), 451 states have internal predecessors, (501), 104 states have call successors, (104), 47 states have call predecessors, (104), 59 states have return successors, (143), 103 states have call predecessors, (143), 102 states have call successors, (143) [2021-12-18 00:59:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 748 transitions. [2021-12-18 00:59:45,848 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 748 transitions. Word has length 183 [2021-12-18 00:59:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:45,848 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 748 transitions. [2021-12-18 00:59:45,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 3.3442622950819674) internal successors, (204), 56 states have internal predecessors, (204), 21 states have call successors, (52), 4 states have call predecessors, (52), 14 states have return successors, (52), 22 states have call predecessors, (52), 21 states have call successors, (52) [2021-12-18 00:59:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 748 transitions. [2021-12-18 00:59:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-18 00:59:45,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:45,850 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2021-12-18 00:59:45,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 00:59:46,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:46,070 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:46,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1989629799, now seen corresponding path program 1 times [2021-12-18 00:59:46,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:46,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441778271] [2021-12-18 00:59:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:46,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:59:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:59:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:59:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:59:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:59:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-18 00:59:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-18 00:59:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:59:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-18 00:59:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-18 00:59:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-18 00:59:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-18 00:59:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-18 00:59:46,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:46,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441778271] [2021-12-18 00:59:46,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441778271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 00:59:46,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 00:59:46,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 00:59:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049174517] [2021-12-18 00:59:46,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 00:59:46,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 00:59:46,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 00:59:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 00:59:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-18 00:59:46,332 INFO L87 Difference]: Start difference. First operand 602 states and 748 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-18 00:59:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 00:59:46,544 INFO L93 Difference]: Finished difference Result 889 states and 1122 transitions. [2021-12-18 00:59:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 00:59:46,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 185 [2021-12-18 00:59:46,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 00:59:46,547 INFO L225 Difference]: With dead ends: 889 [2021-12-18 00:59:46,547 INFO L226 Difference]: Without dead ends: 611 [2021-12-18 00:59:46,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-18 00:59:46,549 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 94 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 00:59:46,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1284 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 00:59:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-12-18 00:59:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 595. [2021-12-18 00:59:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 432 states have (on average 1.1412037037037037) internal successors, (493), 444 states have internal predecessors, (493), 104 states have call successors, (104), 47 states have call predecessors, (104), 58 states have return successors, (141), 103 states have call predecessors, (141), 102 states have call successors, (141) [2021-12-18 00:59:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 738 transitions. [2021-12-18 00:59:46,583 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 738 transitions. Word has length 185 [2021-12-18 00:59:46,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 00:59:46,584 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 738 transitions. [2021-12-18 00:59:46,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-18 00:59:46,585 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 738 transitions. [2021-12-18 00:59:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-18 00:59:46,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 00:59:46,586 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 3, 3, 3, 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] [2021-12-18 00:59:46,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-18 00:59:46,586 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 00:59:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 00:59:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash -666248649, now seen corresponding path program 1 times [2021-12-18 00:59:46,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 00:59:46,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127186832] [2021-12-18 00:59:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:46,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 00:59:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 00:59:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-18 00:59:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-18 00:59:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-18 00:59:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:59:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 00:59:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-18 00:59:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:59:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-18 00:59:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-18 00:59:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-18 00:59:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:59:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-18 00:59:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-18 00:59:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 00:59:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-18 00:59:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-18 00:59:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-18 00:59:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:46,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-18 00:59:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 125 proven. 35 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-18 00:59:47,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 00:59:47,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127186832] [2021-12-18 00:59:47,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127186832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 00:59:47,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739571038] [2021-12-18 00:59:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 00:59:47,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 00:59:47,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 00:59:47,088 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 00:59:47,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 00:59:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 00:59:47,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-18 00:59:47,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 00:59:47,461 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:47,461 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 [2021-12-18 00:59:47,472 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 00:59:47,472 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 [2021-12-18 00:59:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 295 proven. 78 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-18 00:59:50,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 00:59:52,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 00:59:53,997 INFO L354 Elim1Store]: treesize reduction 1133, result has 68.4 percent of original size [2021-12-18 00:59:53,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 2 disjoint index pairs (out of 91 index pairs), introduced 19 new quantified variables, introduced 91 case distinctions, treesize of input 11857 treesize of output 10634 [2021-12-18 00:59:55,310 INFO L354 Elim1Store]: treesize reduction 294, result has 51.8 percent of original size [2021-12-18 00:59:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 232468 treesize of output 199351 [2021-12-18 01:00:00,491 WARN L227 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 4090 DAG size of output: 4018 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:00:02,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:00:02,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 185677 treesize of output 166189 [2021-12-18 01:00:06,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 01:00:06,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 166173 treesize of output 158609 [2021-12-18 01:00:11,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:00:11,735 INFO L244 Elim1Store]: Index analysis took 375 ms [2021-12-18 01:00:28,553 WARN L227 SmtUtils]: Spent 16.80s on a formula simplification. DAG size of input: 798 DAG size of output: 754 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-18 01:00:28,554 INFO L354 Elim1Store]: treesize reduction 106, result has 93.2 percent of original size [2021-12-18 01:00:28,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 20 select indices, 20 select index equivalence classes, 2 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 189 case distinctions, treesize of input 137758 treesize of output 124484 [2021-12-18 01:00:33,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 01:00:34,459 INFO L244 Elim1Store]: Index analysis took 798 ms [2021-12-18 01:01:02,775 WARN L227 SmtUtils]: Spent 28.30s on a formula simplification. DAG size of input: 798 DAG size of output: 754 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-18 01:01:02,777 INFO L354 Elim1Store]: treesize reduction 106, result has 93.2 percent of original size [2021-12-18 01:01:02,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 20 select indices, 20 select index equivalence classes, 2 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 189 case distinctions, treesize of input 124676 treesize of output 109026 [2021-12-18 01:01:12,026 WARN L227 SmtUtils]: Spent 9.24s on a formula simplification that was a NOOP. DAG size: 5206 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:01:25,972 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 3027 DAG size of output: 3028 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:01:41,778 WARN L227 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 3018 DAG size of output: 3018 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:01:55,809 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 2999 DAG size of output: 2999 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:02:40,807 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 2959 DAG size of output: 2959 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:03:07,260 WARN L227 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 2842 DAG size of output: 2842 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:03:15,414 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 2841 DAG size of output: 2841 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:03:23,297 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 2821 DAG size of output: 2821 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:03:45,969 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 2841 DAG size of output: 2841 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:03:55,802 WARN L227 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 2839 DAG size of output: 2833 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:04:04,669 WARN L227 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 2831 DAG size of output: 2831 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:04:12,107 WARN L227 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 2829 DAG size of output: 2829 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:04:21,097 WARN L227 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 2827 DAG size of output: 2821 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:04:46,056 WARN L227 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 2757 DAG size of output: 2757 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:05:22,435 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 2744 DAG size of output: 2744 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:05:35,028 WARN L227 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 2740 DAG size of output: 2740 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:06:19,498 WARN L227 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 2749 DAG size of output: 2749 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:06:53,522 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 2770 DAG size of output: 2770 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:07:05,633 WARN L227 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 2766 DAG size of output: 2766 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:08:25,610 WARN L227 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 2813 DAG size of output: 2813 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:08:41,901 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 2798 DAG size of output: 2798 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:08:50,526 WARN L227 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 2798 DAG size of output: 2798 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:09:10,718 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 2658 DAG size of output: 2658 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 01:09:26,909 WARN L227 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 2794 DAG size of output: 2794 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15