./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_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_priority_queue_clean_up_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 efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:21:48,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:21:48,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:21:48,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:21:48,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:21:48,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:21:48,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:21:48,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:21:48,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:21:48,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:21:48,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:21:48,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:21:48,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:21:48,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:21:48,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:21:48,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:21:48,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:21:48,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:21:48,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:21:48,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:21:48,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:21:48,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:21:48,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:21:48,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:21:48,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:21:48,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:21:48,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:21:48,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:21:48,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:21:48,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:21:48,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:21:48,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:21:48,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:21:48,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:21:48,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:21:48,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:21:48,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:21:48,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:21:48,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:21:48,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:21:48,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:21:48,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 03:21:48,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:21:48,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:21:48,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:21:48,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:21:48,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:21:48,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:21:48,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:21:48,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:21:48,337 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:21:48,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:21:48,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:21:48,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:21:48,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:21:48,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:21:48,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:21:48,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:21:48,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:21:48,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:21:48,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:21:48,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:21:48,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:21:48,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:21:48,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:21:48,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:21:48,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:21:48,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:21:48,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:21:48,341 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:21:48,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:21:48,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:21:48,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:21:48,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-12-16 03:21:48,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:21:48,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:21:48,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:21:48,560 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:21:48,561 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:21:48,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-12-16 03:21:48,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa1c6f4ec/2734a0970a9b432da92652c83c18167d/FLAG422ddf522 [2021-12-16 03:21:49,348 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:21:49,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-12-16 03:21:49,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa1c6f4ec/2734a0970a9b432da92652c83c18167d/FLAG422ddf522 [2021-12-16 03:21:49,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa1c6f4ec/2734a0970a9b432da92652c83c18167d [2021-12-16 03:21:49,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:21:49,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:21:49,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:21:49,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:21:49,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:21:49,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:21:49" (1/1) ... [2021-12-16 03:21:49,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b197b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:49, skipping insertion in model container [2021-12-16 03:21:49,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:21:49" (1/1) ... [2021-12-16 03:21:49,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:21:49,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:21:49,950 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_priority_queue_clean_up_harness.i[4501,4514] [2021-12-16 03:21:49,956 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-12-16 03:21:50,524 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:21:50,584 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,587 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,587 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,589 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,590 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,598 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,599 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,599 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,797 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:21:50,798 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:21:50,799 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:21:50,800 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:21:50,800 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:21:50,801 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:21:50,802 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:21:50,802 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:21:50,803 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:21:50,803 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:21:50,902 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,902 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:50,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:21:50,972 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:21:50,982 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_priority_queue_clean_up_harness.i[4501,4514] [2021-12-16 03:21:50,995 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_priority_queue_clean_up_harness.i[4561,4574] [2021-12-16 03:21:51,019 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-16 03:21:51,030 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,031 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,031 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,032 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,032 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,038 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,059 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,060 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,061 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,100 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-16 03:21:51,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-16 03:21:51,107 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-16 03:21:51,107 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-16 03:21:51,110 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-16 03:21:51,111 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-16 03:21:51,111 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-16 03:21:51,112 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-16 03:21:51,112 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-16 03:21:51,112 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-16 03:21:51,156 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,158 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-16 03:21:51,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:21:51,327 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:21:51,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51 WrapperNode [2021-12-16 03:21:51,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:21:51,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:21:51,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:21:51,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:21:51,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,450 INFO L137 Inliner]: procedures = 689, calls = 1497, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 598 [2021-12-16 03:21:51,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:21:51,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:21:51,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:21:51,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:21:51,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:21:51,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:21:51,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:21:51,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:21:51,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (1/1) ... [2021-12-16 03:21:51,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:21:51,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:21:51,532 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) [2021-12-16 03:21:51,548 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 [2021-12-16 03:21:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-16 03:21:51,562 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-16 03:21:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:21:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-16 03:21:51,562 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-16 03:21:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-16 03:21:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-16 03:21:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-16 03:21:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-16 03:21:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:21:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-16 03:21:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-16 03:21:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 03:21:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 03:21:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:21:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:21:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 03:21:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:21:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:21:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2021-12-16 03:21:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2021-12-16 03:21:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-16 03:21:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-16 03:21:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-16 03:21:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-16 03:21:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-12-16 03:21:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-12-16 03:21:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-16 03:21:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-16 03:21:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 03:21:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 03:21:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:21:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 03:21:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 03:21:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-16 03:21:51,588 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-16 03:21:51,588 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-16 03:21:51,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-16 03:21:51,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:21:51,588 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-16 03:21:51,589 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-16 03:21:51,589 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-16 03:21:51,589 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-16 03:21:51,589 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-12-16 03:21:51,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-12-16 03:21:51,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:21:51,767 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:21:51,769 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:21:52,288 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:21:52,295 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:21:52,295 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 03:21:52,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:21:52 BoogieIcfgContainer [2021-12-16 03:21:52,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:21:52,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:21:52,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:21:52,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:21:52,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:21:49" (1/3) ... [2021-12-16 03:21:52,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd03a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:21:52, skipping insertion in model container [2021-12-16 03:21:52,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:21:51" (2/3) ... [2021-12-16 03:21:52,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd03a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:21:52, skipping insertion in model container [2021-12-16 03:21:52,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:21:52" (3/3) ... [2021-12-16 03:21:52,304 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-12-16 03:21:52,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:21:52,308 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:21:52,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:21:52,356 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 [2021-12-16 03:21:52,356 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 03:21:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-16 03:21:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-16 03:21:52,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:21:52,393 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:21:52,393 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:21:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:21:52,399 INFO L85 PathProgramCache]: Analyzing trace with hash 432166812, now seen corresponding path program 1 times [2021-12-16 03:21:52,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:21:52,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859509687] [2021-12-16 03:21:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:52,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:21:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:21:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:21:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 03:21:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 03:21:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:21:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:21:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:21:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:21:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:21:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 03:21:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:21:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:52,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:21:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:21:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:21:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-16 03:21:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-16 03:21:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-16 03:21:53,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:21:53,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859509687] [2021-12-16 03:21:53,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859509687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:21:53,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:21:53,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:21:53,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526282782] [2021-12-16 03:21:53,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:21:53,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:21:53,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:21:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:21:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:21:53,091 INFO L87 Difference]: Start difference. First operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-16 03:21:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:21:53,450 INFO L93 Difference]: Finished difference Result 361 states and 504 transitions. [2021-12-16 03:21:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:21:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2021-12-16 03:21:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:21:53,466 INFO L225 Difference]: With dead ends: 361 [2021-12-16 03:21:53,466 INFO L226 Difference]: Without dead ends: 202 [2021-12-16 03:21:53,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:21:53,476 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 89 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 03:21:53,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 308 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 03:21:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-16 03:21:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-12-16 03:21:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-16 03:21:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-12-16 03:21:53,542 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 105 [2021-12-16 03:21:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:21:53,542 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-12-16 03:21:53,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-16 03:21:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-12-16 03:21:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-16 03:21:53,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:21:53,545 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:21:53,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:21:53,546 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:21:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:21:53,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672400, now seen corresponding path program 1 times [2021-12-16 03:21:53,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:21:53,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903933274] [2021-12-16 03:21:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:53,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:21:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:21:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:21:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 03:21:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 03:21:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:21:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:21:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:21:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:21:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:21:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 03:21:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 03:21:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 03:21:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:21:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:21:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 03:21:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:21:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:21:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-16 03:21:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-16 03:21:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-16 03:21:53,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:21:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903933274] [2021-12-16 03:21:53,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903933274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:21:53,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:21:53,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 03:21:53,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931659310] [2021-12-16 03:21:53,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:21:53,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:21:53,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:21:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:21:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:21:53,854 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-16 03:21:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:21:54,368 INFO L93 Difference]: Finished difference Result 341 states and 448 transitions. [2021-12-16 03:21:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:21:54,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 122 [2021-12-16 03:21:54,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:21:54,371 INFO L225 Difference]: With dead ends: 341 [2021-12-16 03:21:54,371 INFO L226 Difference]: Without dead ends: 245 [2021-12-16 03:21:54,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:21:54,372 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 278 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 03:21:54,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 671 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 03:21:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-16 03:21:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2021-12-16 03:21:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-16 03:21:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 200 transitions. [2021-12-16 03:21:54,386 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 200 transitions. Word has length 122 [2021-12-16 03:21:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:21:54,386 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 200 transitions. [2021-12-16 03:21:54,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-16 03:21:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 200 transitions. [2021-12-16 03:21:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-16 03:21:54,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:21:54,388 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:21:54,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:21:54,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:21:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:21:54,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2103837312, now seen corresponding path program 1 times [2021-12-16 03:21:54,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:21:54,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644538869] [2021-12-16 03:21:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:54,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:21:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:21:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 03:21:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 03:21:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 03:21:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:21:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:21:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 03:21:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 03:21:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:21:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 03:21:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 03:21:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 03:21:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 03:21:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:21:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 03:21:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 03:21:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:21:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 03:21:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-16 03:21:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-16 03:21:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-16 03:21:54,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:21:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644538869] [2021-12-16 03:21:54,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644538869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:21:54,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:21:54,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 03:21:54,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089668618] [2021-12-16 03:21:54,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:21:54,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:21:54,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:21:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:21:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:21:54,775 INFO L87 Difference]: Start difference. First operand 160 states and 200 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:21:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:21:55,483 INFO L93 Difference]: Finished difference Result 371 states and 489 transitions. [2021-12-16 03:21:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 03:21:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 130 [2021-12-16 03:21:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:21:55,485 INFO L225 Difference]: With dead ends: 371 [2021-12-16 03:21:55,485 INFO L226 Difference]: Without dead ends: 226 [2021-12-16 03:21:55,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:21:55,487 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 255 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 03:21:55,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 954 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 03:21:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-16 03:21:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2021-12-16 03:21:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 111 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-12-16 03:21:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2021-12-16 03:21:55,513 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 130 [2021-12-16 03:21:55,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:21:55,513 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2021-12-16 03:21:55,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-16 03:21:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2021-12-16 03:21:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-16 03:21:55,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:21:55,515 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:21:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:21:55,515 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:21:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:21:55,515 INFO L85 PathProgramCache]: Analyzing trace with hash -209170488, now seen corresponding path program 1 times [2021-12-16 03:21:55,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:21:55,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548760663] [2021-12-16 03:21:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:55,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:21:55,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:21:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909720704] [2021-12-16 03:21:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:55,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:21:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:21:55,576 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) [2021-12-16 03:21:55,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:21:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:55,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 03:21:55,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:21:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-16 03:21:56,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:21:56,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:21:56,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548760663] [2021-12-16 03:21:56,298 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:21:56,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909720704] [2021-12-16 03:21:56,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909720704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:21:56,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:21:56,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:21:56,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610980164] [2021-12-16 03:21:56,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:21:56,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:21:56,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:21:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:21:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:21:56,300 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-16 03:21:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:21:56,440 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2021-12-16 03:21:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:21:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2021-12-16 03:21:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:21:56,442 INFO L225 Difference]: With dead ends: 261 [2021-12-16 03:21:56,442 INFO L226 Difference]: Without dead ends: 162 [2021-12-16 03:21:56,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:21:56,443 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 235 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:21:56,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 802 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:21:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-16 03:21:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-16 03:21:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-12-16 03:21:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2021-12-16 03:21:56,454 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 145 [2021-12-16 03:21:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:21:56,454 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2021-12-16 03:21:56,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-16 03:21:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2021-12-16 03:21:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-16 03:21:56,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:21:56,456 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:21:56,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 03:21:56,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:21:56,677 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:21:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:21:56,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1337604585, now seen corresponding path program 1 times [2021-12-16 03:21:56,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:21:56,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336461176] [2021-12-16 03:21:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:56,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:21:56,725 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:21:56,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864666413] [2021-12-16 03:21:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:56,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:21:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:21:56,728 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) [2021-12-16 03:21:56,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:21:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:57,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 03:21:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:21:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-16 03:21:57,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:21:57,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:21:57,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336461176] [2021-12-16 03:21:57,420 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:21:57,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864666413] [2021-12-16 03:21:57,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864666413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:21:57,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:21:57,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:21:57,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487936936] [2021-12-16 03:21:57,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:21:57,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:21:57,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:21:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:21:57,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:21:57,421 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-16 03:21:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:21:57,609 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2021-12-16 03:21:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:21:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 161 [2021-12-16 03:21:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:21:57,611 INFO L225 Difference]: With dead ends: 274 [2021-12-16 03:21:57,611 INFO L226 Difference]: Without dead ends: 162 [2021-12-16 03:21:57,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:21:57,612 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 300 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:21:57,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1070 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:21:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-16 03:21:57,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-16 03:21:57,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-16 03:21:57,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2021-12-16 03:21:57,617 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 161 [2021-12-16 03:21:57,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:21:57,618 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2021-12-16 03:21:57,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-16 03:21:57,618 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2021-12-16 03:21:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-16 03:21:57,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:21:57,625 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:21:57,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:21:57,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:21:57,826 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:21:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:21:57,826 INFO L85 PathProgramCache]: Analyzing trace with hash 996052163, now seen corresponding path program 1 times [2021-12-16 03:21:57,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:21:57,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475178439] [2021-12-16 03:21:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:57,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:21:57,890 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:21:57,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270908199] [2021-12-16 03:21:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:57,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:21:57,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:21:57,891 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) [2021-12-16 03:21:57,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:21:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:58,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 03:21:58,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:21:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-16 03:21:58,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:21:58,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:21:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475178439] [2021-12-16 03:21:58,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:21:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270908199] [2021-12-16 03:21:58,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270908199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:21:58,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:21:58,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:21:58,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342293401] [2021-12-16 03:21:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:21:58,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:21:58,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:21:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:21:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:21:58,625 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:21:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:21:58,807 INFO L93 Difference]: Finished difference Result 286 states and 356 transitions. [2021-12-16 03:21:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:21:58,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-12-16 03:21:58,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:21:58,839 INFO L225 Difference]: With dead ends: 286 [2021-12-16 03:21:58,839 INFO L226 Difference]: Without dead ends: 180 [2021-12-16 03:21:58,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:21:58,840 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 21 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:21:58,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 897 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:21:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-16 03:21:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2021-12-16 03:21:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 115 states have internal predecessors, (136), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-16 03:21:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2021-12-16 03:21:58,847 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 176 [2021-12-16 03:21:58,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:21:58,848 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2021-12-16 03:21:58,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:21:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2021-12-16 03:21:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-16 03:21:58,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:21:58,849 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:21:58,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 03:21:59,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:21:59,072 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:21:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:21:59,073 INFO L85 PathProgramCache]: Analyzing trace with hash 28701509, now seen corresponding path program 1 times [2021-12-16 03:21:59,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:21:59,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206295827] [2021-12-16 03:21:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:59,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:21:59,113 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:21:59,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105653793] [2021-12-16 03:21:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:21:59,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:21:59,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:21:59,115 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) [2021-12-16 03:21:59,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:21:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:21:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:21:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:21:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-16 03:21:59,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:21:59,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:21:59,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206295827] [2021-12-16 03:21:59,767 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:21:59,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105653793] [2021-12-16 03:21:59,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105653793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:21:59,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:21:59,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:21:59,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845768967] [2021-12-16 03:21:59,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:21:59,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:21:59,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:21:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:21:59,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:21:59,769 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:21:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:21:59,786 INFO L93 Difference]: Finished difference Result 274 states and 339 transitions. [2021-12-16 03:21:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:21:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-12-16 03:21:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:21:59,788 INFO L225 Difference]: With dead ends: 274 [2021-12-16 03:21:59,788 INFO L226 Difference]: Without dead ends: 170 [2021-12-16 03:21:59,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:21:59,789 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 3 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:21:59,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 583 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:21:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-16 03:21:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2021-12-16 03:21:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 117 states have internal predecessors, (138), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-16 03:21:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-12-16 03:21:59,795 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 176 [2021-12-16 03:21:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:21:59,796 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-12-16 03:21:59,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:21:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-12-16 03:21:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-16 03:21:59,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:21:59,798 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:21:59,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:00,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:00,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash -463924665, now seen corresponding path program 1 times [2021-12-16 03:22:00,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:00,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748376283] [2021-12-16 03:22:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:00,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:00,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:00,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896898888] [2021-12-16 03:22:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:00,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:00,116 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) [2021-12-16 03:22:00,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:22:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 03:22:00,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-16 03:22:00,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:22:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-16 03:22:01,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748376283] [2021-12-16 03:22:01,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896898888] [2021-12-16 03:22:01,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896898888] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:22:01,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:22:01,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-16 03:22:01,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866044848] [2021-12-16 03:22:01,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:01,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:22:01,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:01,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:22:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:22:01,229 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-16 03:22:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:01,255 INFO L93 Difference]: Finished difference Result 178 states and 222 transitions. [2021-12-16 03:22:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:22:01,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 176 [2021-12-16 03:22:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:01,258 INFO L225 Difference]: With dead ends: 178 [2021-12-16 03:22:01,258 INFO L226 Difference]: Without dead ends: 176 [2021-12-16 03:22:01,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:22:01,259 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:01,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 978 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-16 03:22:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-12-16 03:22:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 122 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-16 03:22:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 219 transitions. [2021-12-16 03:22:01,273 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 219 transitions. Word has length 176 [2021-12-16 03:22:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:01,274 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 219 transitions. [2021-12-16 03:22:01,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-16 03:22:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 219 transitions. [2021-12-16 03:22:01,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-16 03:22:01,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:01,277 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:01,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 03:22:01,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:01,494 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:01,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1104137534, now seen corresponding path program 1 times [2021-12-16 03:22:01,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:01,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616183924] [2021-12-16 03:22:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:01,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:01,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:01,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654289328] [2021-12-16 03:22:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:01,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:01,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:01,572 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) [2021-12-16 03:22:01,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:22:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:22:02,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-16 03:22:02,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:02,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:02,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616183924] [2021-12-16 03:22:02,197 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:02,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654289328] [2021-12-16 03:22:02,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654289328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:02,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:02,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:22:02,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862186912] [2021-12-16 03:22:02,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:02,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:22:02,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:22:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:22:02,200 INFO L87 Difference]: Start difference. First operand 175 states and 219 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-16 03:22:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:02,234 INFO L93 Difference]: Finished difference Result 281 states and 350 transitions. [2021-12-16 03:22:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:22:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 176 [2021-12-16 03:22:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:02,237 INFO L225 Difference]: With dead ends: 281 [2021-12-16 03:22:02,237 INFO L226 Difference]: Without dead ends: 175 [2021-12-16 03:22:02,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:22:02,239 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 13 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:02,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 950 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-16 03:22:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-12-16 03:22:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-16 03:22:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2021-12-16 03:22:02,251 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 176 [2021-12-16 03:22:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:02,252 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2021-12-16 03:22:02,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-16 03:22:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2021-12-16 03:22:02,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-16 03:22:02,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:02,255 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:02,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:02,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:02,476 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:02,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:02,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1406424536, now seen corresponding path program 1 times [2021-12-16 03:22:02,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:02,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977286686] [2021-12-16 03:22:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:02,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:02,556 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:02,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748752570] [2021-12-16 03:22:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:02,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:02,571 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) [2021-12-16 03:22:02,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:22:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:22:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-16 03:22:03,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:03,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:03,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977286686] [2021-12-16 03:22:03,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:03,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748752570] [2021-12-16 03:22:03,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748752570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:03,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:03,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:22:03,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042643208] [2021-12-16 03:22:03,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:03,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:22:03,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:22:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:22:03,257 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-16 03:22:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:03,300 INFO L93 Difference]: Finished difference Result 283 states and 351 transitions. [2021-12-16 03:22:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:22:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 177 [2021-12-16 03:22:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:03,301 INFO L225 Difference]: With dead ends: 283 [2021-12-16 03:22:03,301 INFO L226 Difference]: Without dead ends: 177 [2021-12-16 03:22:03,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:22:03,302 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 18 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:03,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 948 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-16 03:22:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-12-16 03:22:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 123 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-16 03:22:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 219 transitions. [2021-12-16 03:22:03,309 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 219 transitions. Word has length 177 [2021-12-16 03:22:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:03,309 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 219 transitions. [2021-12-16 03:22:03,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-16 03:22:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 219 transitions. [2021-12-16 03:22:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 03:22:03,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:03,311 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:03,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:03,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:03,533 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1080671750, now seen corresponding path program 1 times [2021-12-16 03:22:03,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:03,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060277977] [2021-12-16 03:22:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:03,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:03,576 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109303936] [2021-12-16 03:22:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:03,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:03,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:03,577 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) [2021-12-16 03:22:03,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:22:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 03:22:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-16 03:22:04,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:04,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:04,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060277977] [2021-12-16 03:22:04,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:04,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109303936] [2021-12-16 03:22:04,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109303936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:04,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:04,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:22:04,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907331217] [2021-12-16 03:22:04,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:04,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:22:04,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:22:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:22:04,217 INFO L87 Difference]: Start difference. First operand 176 states and 219 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:04,254 INFO L93 Difference]: Finished difference Result 293 states and 372 transitions. [2021-12-16 03:22:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:22:04,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-12-16 03:22:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:04,255 INFO L225 Difference]: With dead ends: 293 [2021-12-16 03:22:04,256 INFO L226 Difference]: Without dead ends: 181 [2021-12-16 03:22:04,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:22:04,258 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 7 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:04,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:04,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-16 03:22:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-12-16 03:22:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 124 states have internal predecessors, (143), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-16 03:22:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2021-12-16 03:22:04,272 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 179 [2021-12-16 03:22:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:04,272 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2021-12-16 03:22:04,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2021-12-16 03:22:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 03:22:04,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:04,275 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:04,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:04,491 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,SelfDestructingSolverStorable10 [2021-12-16 03:22:04,491 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash 712361510, now seen corresponding path program 1 times [2021-12-16 03:22:04,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:04,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159847661] [2021-12-16 03:22:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:04,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:04,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:04,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640235141] [2021-12-16 03:22:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:04,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:04,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:04,557 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) [2021-12-16 03:22:04,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 03:22:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 03:22:05,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:05,297 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 11 treesize of output 5 [2021-12-16 03:22:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-16 03:22:05,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:05,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159847661] [2021-12-16 03:22:05,389 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640235141] [2021-12-16 03:22:05,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640235141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:05,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:05,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 03:22:05,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446218466] [2021-12-16 03:22:05,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:05,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:22:05,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:05,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:22:05,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:22:05,391 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-16 03:22:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:05,672 INFO L93 Difference]: Finished difference Result 319 states and 401 transitions. [2021-12-16 03:22:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 03:22:05,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 179 [2021-12-16 03:22:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:05,674 INFO L225 Difference]: With dead ends: 319 [2021-12-16 03:22:05,674 INFO L226 Difference]: Without dead ends: 202 [2021-12-16 03:22:05,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:22:05,677 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 107 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:05,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1490 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:22:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-16 03:22:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2021-12-16 03:22:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 138 states have internal predecessors, (161), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 36 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-16 03:22:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 241 transitions. [2021-12-16 03:22:05,687 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 241 transitions. Word has length 179 [2021-12-16 03:22:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:05,687 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 241 transitions. [2021-12-16 03:22:05,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-16 03:22:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 241 transitions. [2021-12-16 03:22:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-16 03:22:05,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:05,689 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:05,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-16 03:22:05,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:05,911 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1965868264, now seen corresponding path program 1 times [2021-12-16 03:22:05,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:05,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466788969] [2021-12-16 03:22:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:05,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:05,978 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:05,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490537630] [2021-12-16 03:22:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:05,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:05,996 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) [2021-12-16 03:22:06,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 03:22:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 03:22:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:06,617 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 61 treesize of output 37 [2021-12-16 03:22:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 03:22:06,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:06,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:06,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466788969] [2021-12-16 03:22:06,721 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:06,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490537630] [2021-12-16 03:22:06,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490537630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:06,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:06,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:22:06,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830627652] [2021-12-16 03:22:06,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:06,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:22:06,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:22:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:22:06,722 INFO L87 Difference]: Start difference. First operand 192 states and 241 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:06,741 INFO L93 Difference]: Finished difference Result 307 states and 387 transitions. [2021-12-16 03:22:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:22:06,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-12-16 03:22:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:06,743 INFO L225 Difference]: With dead ends: 307 [2021-12-16 03:22:06,743 INFO L226 Difference]: Without dead ends: 198 [2021-12-16 03:22:06,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:22:06,743 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 4 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:06,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 789 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:06,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-16 03:22:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2021-12-16 03:22:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 136 states have (on average 1.1985294117647058) internal successors, (163), 139 states have internal predecessors, (163), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 37 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-16 03:22:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 243 transitions. [2021-12-16 03:22:06,750 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 243 transitions. Word has length 179 [2021-12-16 03:22:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:06,750 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 243 transitions. [2021-12-16 03:22:06,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 243 transitions. [2021-12-16 03:22:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-16 03:22:06,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:06,752 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:06,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:06,973 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,SelfDestructingSolverStorable12 [2021-12-16 03:22:06,973 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1941254556, now seen corresponding path program 1 times [2021-12-16 03:22:06,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:06,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38939319] [2021-12-16 03:22:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:06,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:07,060 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:07,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902150812] [2021-12-16 03:22:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:07,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:07,071 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) [2021-12-16 03:22:07,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 03:22:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:07,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:22:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:07,699 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 61 treesize of output 37 [2021-12-16 03:22:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-16 03:22:07,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:07,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38939319] [2021-12-16 03:22:07,819 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:07,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902150812] [2021-12-16 03:22:07,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902150812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:07,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:07,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:22:07,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240279842] [2021-12-16 03:22:07,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:07,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:22:07,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:22:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:22:07,822 INFO L87 Difference]: Start difference. First operand 194 states and 243 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:07,833 INFO L93 Difference]: Finished difference Result 222 states and 276 transitions. [2021-12-16 03:22:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:22:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 182 [2021-12-16 03:22:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:07,835 INFO L225 Difference]: With dead ends: 222 [2021-12-16 03:22:07,835 INFO L226 Difference]: Without dead ends: 195 [2021-12-16 03:22:07,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:22:07,835 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:07,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 587 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:07,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-16 03:22:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-16 03:22:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 137 states have (on average 1.197080291970803) internal successors, (164), 139 states have internal predecessors, (164), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-16 03:22:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 244 transitions. [2021-12-16 03:22:07,841 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 244 transitions. Word has length 182 [2021-12-16 03:22:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:07,842 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 244 transitions. [2021-12-16 03:22:07,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 244 transitions. [2021-12-16 03:22:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-16 03:22:07,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:07,843 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:07,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:08,066 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,SelfDestructingSolverStorable13 [2021-12-16 03:22:08,066 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:08,067 INFO L85 PathProgramCache]: Analyzing trace with hash -101731212, now seen corresponding path program 2 times [2021-12-16 03:22:08,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088946289] [2021-12-16 03:22:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:08,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:08,139 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:08,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800091588] [2021-12-16 03:22:08,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:22:08,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:08,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:08,154 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) [2021-12-16 03:22:08,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 03:22:08,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:22:08,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:22:08,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:22:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:09,111 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 61 treesize of output 37 [2021-12-16 03:22:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-16 03:22:09,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:09,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088946289] [2021-12-16 03:22:09,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:09,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800091588] [2021-12-16 03:22:09,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800091588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:09,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:09,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:22:09,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694345727] [2021-12-16 03:22:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:09,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:22:09,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:22:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:22:09,233 INFO L87 Difference]: Start difference. First operand 195 states and 244 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:09,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:09,258 INFO L93 Difference]: Finished difference Result 330 states and 410 transitions. [2021-12-16 03:22:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:22:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-12-16 03:22:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:09,260 INFO L225 Difference]: With dead ends: 330 [2021-12-16 03:22:09,260 INFO L226 Difference]: Without dead ends: 211 [2021-12-16 03:22:09,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:22:09,261 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 9 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:09,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 788 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-16 03:22:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2021-12-16 03:22:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 149 states have internal predecessors, (176), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-16 03:22:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 256 transitions. [2021-12-16 03:22:09,267 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 256 transitions. Word has length 185 [2021-12-16 03:22:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:09,267 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 256 transitions. [2021-12-16 03:22:09,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 256 transitions. [2021-12-16 03:22:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-16 03:22:09,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:09,269 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:09,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:09,491 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,SelfDestructingSolverStorable14 [2021-12-16 03:22:09,491 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash 747347188, now seen corresponding path program 1 times [2021-12-16 03:22:09,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:09,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772467726] [2021-12-16 03:22:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:09,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:09,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930723355] [2021-12-16 03:22:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:09,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:09,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:09,548 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) [2021-12-16 03:22:09,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 03:22:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:22:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-16 03:22:10,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:10,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:10,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772467726] [2021-12-16 03:22:10,284 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:10,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930723355] [2021-12-16 03:22:10,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930723355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:10,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:10,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:22:10,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461147703] [2021-12-16 03:22:10,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:10,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:22:10,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:10,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:22:10,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:22:10,286 INFO L87 Difference]: Start difference. First operand 205 states and 256 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:10,308 INFO L93 Difference]: Finished difference Result 332 states and 412 transitions. [2021-12-16 03:22:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:22:10,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-12-16 03:22:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:10,310 INFO L225 Difference]: With dead ends: 332 [2021-12-16 03:22:10,310 INFO L226 Difference]: Without dead ends: 201 [2021-12-16 03:22:10,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:22:10,310 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 2 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 582 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 [2021-12-16 03:22:10,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 582 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:10,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-16 03:22:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2021-12-16 03:22:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 141 states have internal predecessors, (164), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-16 03:22:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 244 transitions. [2021-12-16 03:22:10,317 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 244 transitions. Word has length 185 [2021-12-16 03:22:10,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:10,317 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 244 transitions. [2021-12-16 03:22:10,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 244 transitions. [2021-12-16 03:22:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-16 03:22:10,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:10,319 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:10,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:10,540 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,SelfDestructingSolverStorable15 [2021-12-16 03:22:10,540 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash 382427316, now seen corresponding path program 1 times [2021-12-16 03:22:10,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857928248] [2021-12-16 03:22:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:10,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:10,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:10,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341702712] [2021-12-16 03:22:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:10,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:10,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:10,585 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) [2021-12-16 03:22:10,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 03:22:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:11,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 03:22:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-16 03:22:11,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:11,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:11,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857928248] [2021-12-16 03:22:11,275 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:11,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341702712] [2021-12-16 03:22:11,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341702712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:11,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:11,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:22:11,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971736702] [2021-12-16 03:22:11,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:11,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:22:11,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:11,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:22:11,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:22:11,280 INFO L87 Difference]: Start difference. First operand 197 states and 244 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:11,302 INFO L93 Difference]: Finished difference Result 347 states and 435 transitions. [2021-12-16 03:22:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:22:11,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-12-16 03:22:11,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:11,306 INFO L225 Difference]: With dead ends: 347 [2021-12-16 03:22:11,306 INFO L226 Difference]: Without dead ends: 197 [2021-12-16 03:22:11,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:22:11,308 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:11,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 586 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:11,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-16 03:22:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-12-16 03:22:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 141 states have internal predecessors, (163), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-16 03:22:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-12-16 03:22:11,315 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 185 [2021-12-16 03:22:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:11,315 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-12-16 03:22:11,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 03:22:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-12-16 03:22:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-16 03:22:11,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:11,317 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:11,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:11,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:11,536 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash -908019048, now seen corresponding path program 1 times [2021-12-16 03:22:11,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:11,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441207351] [2021-12-16 03:22:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:11,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:11,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:11,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342322347] [2021-12-16 03:22:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:11,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:11,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:11,577 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) [2021-12-16 03:22:11,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 03:22:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-16 03:22:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:12,076 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 [2021-12-16 03:22:12,469 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-16 03:22:12,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 03:22:14,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:22:14,523 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 23 treesize of output 22 [2021-12-16 03:22:16,667 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1768 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1768))) is different from true [2021-12-16 03:22:18,907 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (and (<= |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| |c_aws_mul_size_checked_#in~r#1.offset|) (exists ((v_ArrVal_1770 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| v_ArrVal_1770)))))) is different from true [2021-12-16 03:22:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 51 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 3 not checked. [2021-12-16 03:22:27,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:22:28,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441207351] [2021-12-16 03:22:28,202 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342322347] [2021-12-16 03:22:28,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342322347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:22:28,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:22:28,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-12-16 03:22:28,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143790750] [2021-12-16 03:22:28,203 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 03:22:28,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 03:22:28,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 03:22:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=667, Unknown=10, NotChecked=106, Total=870 [2021-12-16 03:22:28,204 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 29 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 12 states have call successors, (26), 7 states have call predecessors, (26), 11 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-16 03:22:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:34,671 INFO L93 Difference]: Finished difference Result 428 states and 539 transitions. [2021-12-16 03:22:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 03:22:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 12 states have call successors, (26), 7 states have call predecessors, (26), 11 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 187 [2021-12-16 03:22:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:34,673 INFO L225 Difference]: With dead ends: 428 [2021-12-16 03:22:34,673 INFO L226 Difference]: Without dead ends: 309 [2021-12-16 03:22:34,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 223 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=144, Invalid=1243, Unknown=27, NotChecked=146, Total=1560 [2021-12-16 03:22:34,674 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 158 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1709 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:34,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1491 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1143 Invalid, 0 Unknown, 1709 Unchecked, 0.7s Time] [2021-12-16 03:22:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-16 03:22:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 256. [2021-12-16 03:22:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 189 states have internal predecessors, (216), 41 states have call successors, (41), 23 states have call predecessors, (41), 29 states have return successors, (62), 44 states have call predecessors, (62), 40 states have call successors, (62) [2021-12-16 03:22:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 319 transitions. [2021-12-16 03:22:34,684 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 319 transitions. Word has length 187 [2021-12-16 03:22:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:34,684 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 319 transitions. [2021-12-16 03:22:34,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 12 states have call successors, (26), 7 states have call predecessors, (26), 11 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-16 03:22:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 319 transitions. [2021-12-16 03:22:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-16 03:22:34,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:34,685 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:34,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:34,886 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,SelfDestructingSolverStorable17 [2021-12-16 03:22:34,887 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1752761233, now seen corresponding path program 1 times [2021-12-16 03:22:34,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:34,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324923458] [2021-12-16 03:22:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:34,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:34,927 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:34,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141187663] [2021-12-16 03:22:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:34,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:34,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:34,929 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) [2021-12-16 03:22:34,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 03:22:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-16 03:22:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:35,437 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 [2021-12-16 03:22:35,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:22:35,798 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 25 treesize of output 24 [2021-12-16 03:22:35,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-16 03:22:35,877 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-16 03:22:35,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 03:22:35,944 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-16 03:22:35,944 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 [2021-12-16 03:22:37,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:22:37,998 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 23 treesize of output 22 [2021-12-16 03:22:40,150 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1938 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1938))) is different from true [2021-12-16 03:22:42,375 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int)) (and (exists ((v_ArrVal_1940 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| v_ArrVal_1940)))) (<= |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| |c_aws_mul_size_checked_#in~r#1.offset|))) is different from true [2021-12-16 03:22:44,334 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (v_ArrVal_1940 Int)) (and (<= |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| 0) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| v_ArrVal_1940))))) is different from true [2021-12-16 03:22:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 42 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 10 not checked. [2021-12-16 03:22:45,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:22:45,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:45,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324923458] [2021-12-16 03:22:45,760 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:45,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141187663] [2021-12-16 03:22:45,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141187663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:22:45,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:22:45,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-16 03:22:45,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873213457] [2021-12-16 03:22:45,761 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 03:22:45,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 03:22:45,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:45,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 03:22:45,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=754, Unknown=31, NotChecked=174, Total=1056 [2021-12-16 03:22:45,763 INFO L87 Difference]: Start difference. First operand 256 states and 319 transitions. Second operand has 32 states, 29 states have (on average 4.137931034482759) internal successors, (120), 30 states have internal predecessors, (120), 14 states have call successors, (27), 8 states have call predecessors, (27), 12 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-12-16 03:22:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:53,182 INFO L93 Difference]: Finished difference Result 487 states and 610 transitions. [2021-12-16 03:22:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 03:22:53,182 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.137931034482759) internal successors, (120), 30 states have internal predecessors, (120), 14 states have call successors, (27), 8 states have call predecessors, (27), 12 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) Word has length 193 [2021-12-16 03:22:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:53,184 INFO L225 Difference]: With dead ends: 487 [2021-12-16 03:22:53,184 INFO L226 Difference]: Without dead ends: 355 [2021-12-16 03:22:53,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 229 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=143, Invalid=1220, Unknown=55, NotChecked=222, Total=1640 [2021-12-16 03:22:53,185 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 135 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 3695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2580 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:53,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1851 Invalid, 3695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1040 Invalid, 0 Unknown, 2580 Unchecked, 0.7s Time] [2021-12-16 03:22:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-16 03:22:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 311. [2021-12-16 03:22:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 228 states have (on average 1.1710526315789473) internal successors, (267), 235 states have internal predecessors, (267), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (76), 50 states have call predecessors, (76), 44 states have call successors, (76) [2021-12-16 03:22:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 388 transitions. [2021-12-16 03:22:53,198 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 388 transitions. Word has length 193 [2021-12-16 03:22:53,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:53,198 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 388 transitions. [2021-12-16 03:22:53,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.137931034482759) internal successors, (120), 30 states have internal predecessors, (120), 14 states have call successors, (27), 8 states have call predecessors, (27), 12 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-12-16 03:22:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 388 transitions. [2021-12-16 03:22:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-16 03:22:53,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:53,200 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:53,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:53,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:53,423 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:53,423 INFO L85 PathProgramCache]: Analyzing trace with hash -16710381, now seen corresponding path program 1 times [2021-12-16 03:22:53,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:53,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115186622] [2021-12-16 03:22:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:53,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:53,473 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:53,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031140623] [2021-12-16 03:22:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:53,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:53,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:53,488 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) [2021-12-16 03:22:53,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 03:22:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:54,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 03:22:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 03:22:54,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:22:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-16 03:22:54,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:54,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115186622] [2021-12-16 03:22:54,758 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:54,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031140623] [2021-12-16 03:22:54,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031140623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:22:54,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:22:54,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 03:22:54,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250381775] [2021-12-16 03:22:54,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 03:22:54,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 03:22:54,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 03:22:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 03:22:54,759 INFO L87 Difference]: Start difference. First operand 311 states and 388 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-12-16 03:22:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:54,852 INFO L93 Difference]: Finished difference Result 473 states and 608 transitions. [2021-12-16 03:22:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:22:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 193 [2021-12-16 03:22:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:54,854 INFO L225 Difference]: With dead ends: 473 [2021-12-16 03:22:54,854 INFO L226 Difference]: Without dead ends: 326 [2021-12-16 03:22:54,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:22:54,855 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 40 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:54,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 762 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 03:22:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-16 03:22:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 320. [2021-12-16 03:22:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 237 states have (on average 1.1772151898734178) internal successors, (279), 244 states have internal predecessors, (279), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (76), 50 states have call predecessors, (76), 44 states have call successors, (76) [2021-12-16 03:22:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 400 transitions. [2021-12-16 03:22:54,866 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 400 transitions. Word has length 193 [2021-12-16 03:22:54,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:54,867 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 400 transitions. [2021-12-16 03:22:54,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-12-16 03:22:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 400 transitions. [2021-12-16 03:22:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-16 03:22:54,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:54,868 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:54,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:55,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:55,108 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:55,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1529453249, now seen corresponding path program 1 times [2021-12-16 03:22:55,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:55,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976876933] [2021-12-16 03:22:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:55,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:55,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:55,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349318455] [2021-12-16 03:22:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:55,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:55,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:55,148 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) [2021-12-16 03:22:55,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 03:22:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:55,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 2768 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 03:22:55,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-16 03:22:55,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:22:55,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:55,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976876933] [2021-12-16 03:22:55,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:55,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349318455] [2021-12-16 03:22:55,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349318455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:22:55,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:22:55,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 03:22:55,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866150336] [2021-12-16 03:22:55,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:22:55,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:22:55,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:22:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:22:55,906 INFO L87 Difference]: Start difference. First operand 320 states and 400 transitions. Second operand has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2021-12-16 03:22:56,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:56,130 INFO L93 Difference]: Finished difference Result 474 states and 589 transitions. [2021-12-16 03:22:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:22:56,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) Word has length 205 [2021-12-16 03:22:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:56,133 INFO L225 Difference]: With dead ends: 474 [2021-12-16 03:22:56,133 INFO L226 Difference]: Without dead ends: 318 [2021-12-16 03:22:56,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:22:56,134 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 233 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:56,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1091 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 03:22:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-12-16 03:22:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2021-12-16 03:22:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 236 states have (on average 1.173728813559322) internal successors, (277), 242 states have internal predecessors, (277), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (75), 50 states have call predecessors, (75), 44 states have call successors, (75) [2021-12-16 03:22:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 397 transitions. [2021-12-16 03:22:56,146 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 397 transitions. Word has length 205 [2021-12-16 03:22:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:56,146 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 397 transitions. [2021-12-16 03:22:56,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2021-12-16 03:22:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 397 transitions. [2021-12-16 03:22:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-16 03:22:56,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:56,148 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:56,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:56,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:56,368 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash -767778095, now seen corresponding path program 1 times [2021-12-16 03:22:56,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:56,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394191911] [2021-12-16 03:22:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:56,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:56,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:56,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739983485] [2021-12-16 03:22:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:56,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:56,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:56,428 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) [2021-12-16 03:22:56,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 03:22:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:22:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2909 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 03:22:56,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-16 03:22:57,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:22:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-16 03:22:57,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:22:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394191911] [2021-12-16 03:22:57,636 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 03:22:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739983485] [2021-12-16 03:22:57,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739983485] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:22:57,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:22:57,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-16 03:22:57,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166740744] [2021-12-16 03:22:57,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 03:22:57,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 03:22:57,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:22:57,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 03:22:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:22:57,638 INFO L87 Difference]: Start difference. First operand 318 states and 397 transitions. Second operand has 13 states, 11 states have (on average 10.545454545454545) internal successors, (116), 13 states have internal predecessors, (116), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-12-16 03:22:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 03:22:57,712 INFO L93 Difference]: Finished difference Result 467 states and 577 transitions. [2021-12-16 03:22:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:22:57,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.545454545454545) internal successors, (116), 13 states have internal predecessors, (116), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 220 [2021-12-16 03:22:57,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 03:22:57,715 INFO L225 Difference]: With dead ends: 467 [2021-12-16 03:22:57,715 INFO L226 Difference]: Without dead ends: 321 [2021-12-16 03:22:57,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:22:57,716 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 23 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 03:22:57,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1321 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 03:22:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-16 03:22:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2021-12-16 03:22:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 238 states have (on average 1.1722689075630253) internal successors, (279), 244 states have internal predecessors, (279), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (75), 50 states have call predecessors, (75), 44 states have call successors, (75) [2021-12-16 03:22:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 399 transitions. [2021-12-16 03:22:57,731 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 399 transitions. Word has length 220 [2021-12-16 03:22:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 03:22:57,732 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 399 transitions. [2021-12-16 03:22:57,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.545454545454545) internal successors, (116), 13 states have internal predecessors, (116), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-12-16 03:22:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 399 transitions. [2021-12-16 03:22:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-16 03:22:57,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 03:22:57,734 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:22:57,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 03:22:57,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:57,956 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 03:22:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:22:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1940716689, now seen corresponding path program 2 times [2021-12-16 03:22:57,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:22:57,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267997739] [2021-12-16 03:22:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:22:57,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:22:57,996 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 03:22:57,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685536847] [2021-12-16 03:22:57,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:22:57,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:22:57,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:22:57,998 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) [2021-12-16 03:22:57,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 03:22:58,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:22:58,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:22:58,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 2928 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 03:22:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:22:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-16 03:22:59,163 INFO L328 TraceCheckSpWp]: Computing backward predicates...