./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 173e3943 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 0.2.1-dev-173e394 [2021-11-06 11:27:41,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 11:27:41,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 11:27:41,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 11:27:41,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 11:27:41,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 11:27:41,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 11:27:41,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 11:27:41,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 11:27:41,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 11:27:41,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 11:27:41,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 11:27:41,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 11:27:41,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 11:27:41,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 11:27:41,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 11:27:41,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 11:27:41,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 11:27:41,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 11:27:41,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 11:27:41,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 11:27:41,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 11:27:41,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 11:27:41,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 11:27:41,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 11:27:41,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 11:27:41,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 11:27:41,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 11:27:41,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 11:27:41,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 11:27:41,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 11:27:41,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 11:27:41,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 11:27:41,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 11:27:41,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 11:27:41,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 11:27:41,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 11:27:41,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 11:27:41,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 11:27:41,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 11:27:41,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 11:27:41,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 11:27:41,368 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 11:27:41,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 11:27:41,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 11:27:41,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 11:27:41,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 11:27:41,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 11:27:41,371 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 11:27:41,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 11:27:41,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 11:27:41,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 11:27:41,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 11:27:41,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 11:27:41,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 11:27:41,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 11:27:41,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 11:27:41,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 11:27:41,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 11:27:41,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 11:27:41,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 11:27:41,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 11:27:41,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 11:27:41,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 11:27:41,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 11:27:41,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 11:27:41,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 11:27:41,374 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 11:27:41,374 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 11:27:41,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 11:27:41,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 11:27:41,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-11-06 11:27:41,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 11:27:41,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 11:27:41,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 11:27:41,603 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 11:27:41,604 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 11:27:41,605 INFO L432 ainManager$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 [2021-11-06 11:27:41,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaeb65ebf/dfd437770d6b4af6a4abd5ae23d2b90e/FLAG4e539303e [2021-11-06 11:27:42,148 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 11:27:42,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-06 11:27:42,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaeb65ebf/dfd437770d6b4af6a4abd5ae23d2b90e/FLAG4e539303e [2021-11-06 11:27:42,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaeb65ebf/dfd437770d6b4af6a4abd5ae23d2b90e [2021-11-06 11:27:42,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 11:27:42,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 11:27:42,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 11:27:42,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 11:27:42,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 11:27:42,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:27:42" (1/1) ... [2021-11-06 11:27:42,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@171ccd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:42, skipping insertion in model container [2021-11-06 11:27:42,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:27:42" (1/1) ... [2021-11-06 11:27:42,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 11:27:42,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 11:27:42,656 WARN L228 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] [2021-11-06 11:27:42,662 WARN L228 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] [2021-11-06 11:27:42,674 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 11:27:42,680 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 11:27:43,078 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 11:27:43,133 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,134 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,135 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,136 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,136 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,148 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,149 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,150 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,151 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,306 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 11:27:43,307 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 11:27:43,308 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 11:27:43,309 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 11:27:43,310 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 11:27:43,312 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 11:27:43,313 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 11:27:43,314 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 11:27:43,314 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 11:27:43,318 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 11:27:43,448 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,453 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 11:27:43,515 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 11:27:43,524 WARN L228 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] [2021-11-06 11:27:43,524 WARN L228 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] [2021-11-06 11:27:43,526 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-06 11:27:43,526 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-06 11:27:43,543 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-06 11:27:43,551 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,552 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,552 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,552 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,552 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,556 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,557 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,557 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,558 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,590 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-06 11:27:43,591 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-06 11:27:43,591 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-06 11:27:43,591 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-06 11:27:43,592 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-06 11:27:43,592 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-06 11:27:43,592 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-06 11:27:43,593 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-06 11:27:43,593 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-06 11:27:43,593 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-06 11:27:43,617 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,617 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-06 11:27:43,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 11:27:43,813 INFO L208 MainTranslator]: Completed translation [2021-11-06 11:27:43,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43 WrapperNode [2021-11-06 11:27:43,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 11:27:43,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 11:27:43,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 11:27:43,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 11:27:43,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:43,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:43,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 11:27:43,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 11:27:43,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 11:27:43,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 11:27:43,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:43,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:43,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:43,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:43,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:43,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:44,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:44,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 11:27:44,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 11:27:44,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 11:27:44,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 11:27:44,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (1/1) ... [2021-11-06 11:27:44,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 11:27:44,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:44,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 11:27:44,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 11:27:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 11:27:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 11:27:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 11:27:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 11:27:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 11:27:44,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 11:27:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 11:27:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure __builtin_umull_overflow [2021-11-06 11:27:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 11:27:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 11:27:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 11:27:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 11:27:50,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 11:27:50,964 INFO L299 CfgBuilder]: Removed 160 assume(true) statements. [2021-11-06 11:27:50,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:27:50 BoogieIcfgContainer [2021-11-06 11:27:50,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 11:27:50,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 11:27:50,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 11:27:50,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 11:27:50,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:27:42" (1/3) ... [2021-11-06 11:27:50,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d15331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:27:50, skipping insertion in model container [2021-11-06 11:27:50,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:27:43" (2/3) ... [2021-11-06 11:27:50,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d15331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:27:50, skipping insertion in model container [2021-11-06 11:27:50,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:27:50" (3/3) ... [2021-11-06 11:27:50,971 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-11-06 11:27:50,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 11:27:50,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-06 11:27:51,002 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 11:27:51,010 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 11:27:51,011 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-06 11:27:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 190 states have (on average 1.4631578947368422) internal successors, (278), 192 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-06 11:27:51,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:51,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:51,045 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:27:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1087609144, now seen corresponding path program 1 times [2021-11-06 11:27:51,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:51,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036625088] [2021-11-06 11:27:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:51,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:27:51,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:51,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036625088] [2021-11-06 11:27:51,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036625088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:51,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:51,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 11:27:51,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059155978] [2021-11-06 11:27:51,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 11:27:51,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:51,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 11:27:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 11:27:51,574 INFO L87 Difference]: Start difference. First operand has 193 states, 190 states have (on average 1.4631578947368422) internal successors, (278), 192 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:51,612 INFO L93 Difference]: Finished difference Result 380 states and 549 transitions. [2021-11-06 11:27:51,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 11:27:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-06 11:27:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:51,621 INFO L225 Difference]: With dead ends: 380 [2021-11-06 11:27:51,621 INFO L226 Difference]: Without dead ends: 188 [2021-11-06 11:27:51,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 11:27:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-06 11:27:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-06 11:27:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3172043010752688) internal successors, (245), 187 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 245 transitions. [2021-11-06 11:27:51,660 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 245 transitions. Word has length 45 [2021-11-06 11:27:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:51,661 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 245 transitions. [2021-11-06 11:27:51,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 245 transitions. [2021-11-06 11:27:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-06 11:27:51,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:51,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:51,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 11:27:51,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:27:51,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash 339318222, now seen corresponding path program 1 times [2021-11-06 11:27:51,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:51,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385088646] [2021-11-06 11:27:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:51,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:27:51,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:51,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385088646] [2021-11-06 11:27:51,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385088646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:51,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:51,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:27:51,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256296409] [2021-11-06 11:27:51,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:27:51,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:27:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:27:51,956 INFO L87 Difference]: Start difference. First operand 188 states and 245 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:52,013 INFO L93 Difference]: Finished difference Result 296 states and 385 transitions. [2021-11-06 11:27:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:27:52,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-06 11:27:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:52,016 INFO L225 Difference]: With dead ends: 296 [2021-11-06 11:27:52,017 INFO L226 Difference]: Without dead ends: 188 [2021-11-06 11:27:52,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:27:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-06 11:27:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-06 11:27:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3118279569892473) internal successors, (244), 187 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 244 transitions. [2021-11-06 11:27:52,027 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 244 transitions. Word has length 51 [2021-11-06 11:27:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:52,027 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 244 transitions. [2021-11-06 11:27:52,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 244 transitions. [2021-11-06 11:27:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-06 11:27:52,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:52,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:52,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 11:27:52,032 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:27:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash 168473663, now seen corresponding path program 1 times [2021-11-06 11:27:52,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:52,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987469707] [2021-11-06 11:27:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:52,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:27:52,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:52,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987469707] [2021-11-06 11:27:52,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987469707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:52,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:52,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:27:52,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576130169] [2021-11-06 11:27:52,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:27:52,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:52,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:27:52,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:27:52,346 INFO L87 Difference]: Start difference. First operand 188 states and 244 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:52,561 INFO L93 Difference]: Finished difference Result 409 states and 532 transitions. [2021-11-06 11:27:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:27:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-06 11:27:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:52,564 INFO L225 Difference]: With dead ends: 409 [2021-11-06 11:27:52,564 INFO L226 Difference]: Without dead ends: 269 [2021-11-06 11:27:52,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:27:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-06 11:27:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 188. [2021-11-06 11:27:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3064516129032258) internal successors, (243), 187 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 243 transitions. [2021-11-06 11:27:52,573 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 243 transitions. Word has length 55 [2021-11-06 11:27:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:52,573 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 243 transitions. [2021-11-06 11:27:52,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:52,574 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 243 transitions. [2021-11-06 11:27:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-06 11:27:52,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:52,574 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:52,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 11:27:52,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:27:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:52,575 INFO L85 PathProgramCache]: Analyzing trace with hash -795727197, now seen corresponding path program 1 times [2021-11-06 11:27:52,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:52,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924095097] [2021-11-06 11:27:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:52,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:52,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:27:52,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173336068] [2021-11-06 11:27:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:52,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:52,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:52,646 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) [2021-11-06 11:27:52,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 11:27:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:53,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 2554 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 11:27:53,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:27:53,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:53,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924095097] [2021-11-06 11:27:53,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:27:53,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173336068] [2021-11-06 11:27:53,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173336068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:53,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:53,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:27:53,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185261370] [2021-11-06 11:27:53,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:27:53,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:27:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:27:53,828 INFO L87 Difference]: Start difference. First operand 188 states and 243 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:54,028 INFO L93 Difference]: Finished difference Result 297 states and 384 transitions. [2021-11-06 11:27:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 11:27:54,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-06 11:27:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:54,041 INFO L225 Difference]: With dead ends: 297 [2021-11-06 11:27:54,041 INFO L226 Difference]: Without dead ends: 188 [2021-11-06 11:27:54,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:27:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-06 11:27:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-11-06 11:27:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 187 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 242 transitions. [2021-11-06 11:27:54,048 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 242 transitions. Word has length 63 [2021-11-06 11:27:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:54,049 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 242 transitions. [2021-11-06 11:27:54,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 242 transitions. [2021-11-06 11:27:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-06 11:27:54,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:54,050 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:54,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:54,263 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 [2021-11-06 11:27:54,264 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:27:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1514601710, now seen corresponding path program 1 times [2021-11-06 11:27:54,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:54,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978799649] [2021-11-06 11:27:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:54,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:54,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:27:54,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696795476] [2021-11-06 11:27:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:54,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:54,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:54,323 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) [2021-11-06 11:27:54,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 11:27:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:54,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 11:27:54,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:27:55,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:55,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978799649] [2021-11-06 11:27:55,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:27:55,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696795476] [2021-11-06 11:27:55,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696795476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:55,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:55,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 11:27:55,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246203339] [2021-11-06 11:27:55,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:27:55,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:27:55,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:27:55,539 INFO L87 Difference]: Start difference. First operand 188 states and 242 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:56,022 INFO L93 Difference]: Finished difference Result 384 states and 496 transitions. [2021-11-06 11:27:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 11:27:56,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-06 11:27:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:56,024 INFO L225 Difference]: With dead ends: 384 [2021-11-06 11:27:56,024 INFO L226 Difference]: Without dead ends: 259 [2021-11-06 11:27:56,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-06 11:27:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-06 11:27:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 188. [2021-11-06 11:27:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.2956989247311828) internal successors, (241), 187 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2021-11-06 11:27:56,031 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 75 [2021-11-06 11:27:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:56,031 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2021-11-06 11:27:56,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2021-11-06 11:27:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 11:27:56,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:56,032 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:56,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:56,247 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 [2021-11-06 11:27:56,248 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:27:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 328015662, now seen corresponding path program 1 times [2021-11-06 11:27:56,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:56,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477821958] [2021-11-06 11:27:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:56,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:56,318 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:27:56,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151505716] [2021-11-06 11:27:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:56,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:56,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:56,321 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) [2021-11-06 11:27:56,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 11:27:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:56,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-06 11:27:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:27:57,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:57,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477821958] [2021-11-06 11:27:57,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:27:57,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151505716] [2021-11-06 11:27:57,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151505716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:57,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:57,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:27:57,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053819874] [2021-11-06 11:27:57,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:27:57,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:27:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:27:57,214 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:57,417 INFO L93 Difference]: Finished difference Result 339 states and 434 transitions. [2021-11-06 11:27:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 11:27:57,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-06 11:27:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:57,419 INFO L225 Difference]: With dead ends: 339 [2021-11-06 11:27:57,419 INFO L226 Difference]: Without dead ends: 276 [2021-11-06 11:27:57,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:27:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-06 11:27:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 191. [2021-11-06 11:27:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.2857142857142858) internal successors, (243), 190 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 243 transitions. [2021-11-06 11:27:57,426 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 243 transitions. Word has length 83 [2021-11-06 11:27:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:57,427 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 243 transitions. [2021-11-06 11:27:57,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 243 transitions. [2021-11-06 11:27:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 11:27:57,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:57,428 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:57,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:57,649 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 [2021-11-06 11:27:57,650 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:27:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash 329624376, now seen corresponding path program 1 times [2021-11-06 11:27:57,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:57,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146503580] [2021-11-06 11:27:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:57,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:57,706 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:27:57,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914877693] [2021-11-06 11:27:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:57,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:57,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:57,708 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) [2021-11-06 11:27:57,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 11:27:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:58,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 2702 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 11:27:58,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:27:58,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:58,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146503580] [2021-11-06 11:27:58,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:27:58,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914877693] [2021-11-06 11:27:58,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914877693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:58,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:58,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:27:58,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966989097] [2021-11-06 11:27:58,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:27:58,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:27:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:27:58,632 INFO L87 Difference]: Start difference. First operand 191 states and 243 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:27:58,741 INFO L93 Difference]: Finished difference Result 268 states and 338 transitions. [2021-11-06 11:27:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:27:58,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-06 11:27:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:27:58,743 INFO L225 Difference]: With dead ends: 268 [2021-11-06 11:27:58,743 INFO L226 Difference]: Without dead ends: 196 [2021-11-06 11:27:58,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:27:58,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-06 11:27:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2021-11-06 11:27:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.2751322751322751) internal successors, (241), 190 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 241 transitions. [2021-11-06 11:27:58,749 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 241 transitions. Word has length 83 [2021-11-06 11:27:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:27:58,749 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 241 transitions. [2021-11-06 11:27:58,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:27:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 241 transitions. [2021-11-06 11:27:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-06 11:27:58,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:27:58,750 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:27:58,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 11:27:58,972 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 [2021-11-06 11:27:58,972 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:27:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:27:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1669729280, now seen corresponding path program 1 times [2021-11-06 11:27:58,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:27:58,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382077708] [2021-11-06 11:27:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:58,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:27:59,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:27:59,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401325472] [2021-11-06 11:27:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:27:59,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:27:59,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:27:59,029 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) [2021-11-06 11:27:59,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 11:27:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:27:59,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 11:27:59,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:27:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:27:59,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:27:59,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382077708] [2021-11-06 11:27:59,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:27:59,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401325472] [2021-11-06 11:27:59,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401325472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:27:59,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:27:59,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:27:59,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627789972] [2021-11-06 11:27:59,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:27:59,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:27:59,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:27:59,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:27:59,986 INFO L87 Difference]: Start difference. First operand 191 states and 241 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:00,319 INFO L93 Difference]: Finished difference Result 423 states and 537 transitions. [2021-11-06 11:28:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 11:28:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-06 11:28:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:00,321 INFO L225 Difference]: With dead ends: 423 [2021-11-06 11:28:00,321 INFO L226 Difference]: Without dead ends: 308 [2021-11-06 11:28:00,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:28:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-06 11:28:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 198. [2021-11-06 11:28:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.2653061224489797) internal successors, (248), 197 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 248 transitions. [2021-11-06 11:28:00,330 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 248 transitions. Word has length 84 [2021-11-06 11:28:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:00,330 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 248 transitions. [2021-11-06 11:28:00,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 248 transitions. [2021-11-06 11:28:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 11:28:00,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:00,331 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:00,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 11:28:00,535 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 [2021-11-06 11:28:00,538 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash 968358744, now seen corresponding path program 1 times [2021-11-06 11:28:00,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:00,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657425988] [2021-11-06 11:28:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:00,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:00,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:00,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094280477] [2021-11-06 11:28:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:00,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:00,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:00,609 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) [2021-11-06 11:28:00,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 11:28:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:01,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 11:28:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 11:28:01,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:01,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657425988] [2021-11-06 11:28:01,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:01,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094280477] [2021-11-06 11:28:01,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094280477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:01,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:01,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 11:28:01,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903145604] [2021-11-06 11:28:01,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:28:01,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:01,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:28:01,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:28:01,684 INFO L87 Difference]: Start difference. First operand 198 states and 248 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:02,281 INFO L93 Difference]: Finished difference Result 374 states and 465 transitions. [2021-11-06 11:28:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:28:02,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-06 11:28:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:02,283 INFO L225 Difference]: With dead ends: 374 [2021-11-06 11:28:02,283 INFO L226 Difference]: Without dead ends: 281 [2021-11-06 11:28:02,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-06 11:28:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-06 11:28:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 202. [2021-11-06 11:28:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.26) internal successors, (252), 201 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 252 transitions. [2021-11-06 11:28:02,290 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 252 transitions. Word has length 86 [2021-11-06 11:28:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:02,290 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 252 transitions. [2021-11-06 11:28:02,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 252 transitions. [2021-11-06 11:28:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-06 11:28:02,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:02,291 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:02,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 11:28:02,503 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 [2021-11-06 11:28:02,503 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1597991650, now seen corresponding path program 1 times [2021-11-06 11:28:02,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:02,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571015270] [2021-11-06 11:28:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:02,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:02,566 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:02,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872339611] [2021-11-06 11:28:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:02,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:02,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:02,568 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) [2021-11-06 11:28:02,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 11:28:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 11:28:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 11:28:03,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:03,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571015270] [2021-11-06 11:28:03,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:03,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872339611] [2021-11-06 11:28:03,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872339611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:03,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:03,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:28:03,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351417921] [2021-11-06 11:28:03,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:28:03,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:03,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:28:03,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:28:03,919 INFO L87 Difference]: Start difference. First operand 202 states and 252 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:04,356 INFO L93 Difference]: Finished difference Result 419 states and 510 transitions. [2021-11-06 11:28:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 11:28:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-06 11:28:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:04,359 INFO L225 Difference]: With dead ends: 419 [2021-11-06 11:28:04,359 INFO L226 Difference]: Without dead ends: 323 [2021-11-06 11:28:04,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-06 11:28:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-06 11:28:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 202. [2021-11-06 11:28:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.255) internal successors, (251), 201 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 251 transitions. [2021-11-06 11:28:04,368 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 251 transitions. Word has length 88 [2021-11-06 11:28:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:04,369 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 251 transitions. [2021-11-06 11:28:04,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 251 transitions. [2021-11-06 11:28:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 11:28:04,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:04,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:04,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 11:28:04,579 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 [2021-11-06 11:28:04,580 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash 647571582, now seen corresponding path program 1 times [2021-11-06 11:28:04,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:04,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162909575] [2021-11-06 11:28:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:04,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:04,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:04,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175806213] [2021-11-06 11:28:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:04,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:04,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:04,645 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) [2021-11-06 11:28:04,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 11:28:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:05,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 11:28:05,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:28:05,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:05,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162909575] [2021-11-06 11:28:05,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:05,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175806213] [2021-11-06 11:28:05,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175806213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:05,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:05,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 11:28:05,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74426831] [2021-11-06 11:28:05,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 11:28:05,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:05,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 11:28:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 11:28:05,796 INFO L87 Difference]: Start difference. First operand 202 states and 251 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:06,683 INFO L93 Difference]: Finished difference Result 367 states and 449 transitions. [2021-11-06 11:28:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:28:06,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-06 11:28:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:06,684 INFO L225 Difference]: With dead ends: 367 [2021-11-06 11:28:06,684 INFO L226 Difference]: Without dead ends: 258 [2021-11-06 11:28:06,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-06 11:28:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-06 11:28:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 202. [2021-11-06 11:28:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.24) internal successors, (248), 201 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 248 transitions. [2021-11-06 11:28:06,692 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 248 transitions. Word has length 89 [2021-11-06 11:28:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:06,693 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 248 transitions. [2021-11-06 11:28:06,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 248 transitions. [2021-11-06 11:28:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 11:28:06,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:06,694 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:06,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 11:28:06,907 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 [2021-11-06 11:28:06,907 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1384834045, now seen corresponding path program 1 times [2021-11-06 11:28:06,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:06,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486517019] [2021-11-06 11:28:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:06,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:06,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:06,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350374942] [2021-11-06 11:28:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:06,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:06,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:06,988 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) [2021-11-06 11:28:06,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-06 11:28:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 11:28:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:28:08,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:08,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486517019] [2021-11-06 11:28:08,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:08,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350374942] [2021-11-06 11:28:08,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350374942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:08,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:08,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 11:28:08,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177305484] [2021-11-06 11:28:08,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:28:08,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:28:08,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:28:08,160 INFO L87 Difference]: Start difference. First operand 202 states and 248 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:08,605 INFO L93 Difference]: Finished difference Result 460 states and 561 transitions. [2021-11-06 11:28:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:28:08,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-06 11:28:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:08,607 INFO L225 Difference]: With dead ends: 460 [2021-11-06 11:28:08,607 INFO L226 Difference]: Without dead ends: 337 [2021-11-06 11:28:08,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:28:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-06 11:28:08,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 208. [2021-11-06 11:28:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 206 states have (on average 1.2427184466019416) internal successors, (256), 207 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 256 transitions. [2021-11-06 11:28:08,614 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 256 transitions. Word has length 92 [2021-11-06 11:28:08,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:08,615 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 256 transitions. [2021-11-06 11:28:08,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 256 transitions. [2021-11-06 11:28:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 11:28:08,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:08,616 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:08,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-06 11:28:08,823 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 [2021-11-06 11:28:08,823 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash -554328001, now seen corresponding path program 1 times [2021-11-06 11:28:08,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:08,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771562030] [2021-11-06 11:28:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:08,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:08,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:08,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337852202] [2021-11-06 11:28:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:08,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:08,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:08,873 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) [2021-11-06 11:28:08,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-06 11:28:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 2732 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 11:28:09,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:28:10,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:10,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771562030] [2021-11-06 11:28:10,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:10,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337852202] [2021-11-06 11:28:10,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337852202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:10,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:10,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 11:28:10,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222265027] [2021-11-06 11:28:10,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:28:10,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:10,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:28:10,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:28:10,219 INFO L87 Difference]: Start difference. First operand 208 states and 256 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:17,508 INFO L93 Difference]: Finished difference Result 405 states and 499 transitions. [2021-11-06 11:28:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 11:28:17,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-06 11:28:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:17,510 INFO L225 Difference]: With dead ends: 405 [2021-11-06 11:28:17,510 INFO L226 Difference]: Without dead ends: 272 [2021-11-06 11:28:17,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:28:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-06 11:28:17,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 212. [2021-11-06 11:28:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 210 states have (on average 1.2428571428571429) internal successors, (261), 211 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 261 transitions. [2021-11-06 11:28:17,517 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 261 transitions. Word has length 92 [2021-11-06 11:28:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:17,518 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 261 transitions. [2021-11-06 11:28:17,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 261 transitions. [2021-11-06 11:28:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 11:28:17,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:17,519 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:17,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-06 11:28:17,736 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 [2021-11-06 11:28:17,737 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:17,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:17,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1373944701, now seen corresponding path program 1 times [2021-11-06 11:28:17,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:17,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469372858] [2021-11-06 11:28:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:17,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:17,785 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:17,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190063093] [2021-11-06 11:28:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:17,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:17,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:17,787 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) [2021-11-06 11:28:17,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-06 11:28:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:18,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 11:28:18,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:28:18,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:18,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469372858] [2021-11-06 11:28:18,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190063093] [2021-11-06 11:28:18,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190063093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:18,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:18,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:28:18,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308457322] [2021-11-06 11:28:18,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:28:18,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:18,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:28:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:28:18,896 INFO L87 Difference]: Start difference. First operand 212 states and 261 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:18,983 INFO L93 Difference]: Finished difference Result 353 states and 432 transitions. [2021-11-06 11:28:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:28:18,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-06 11:28:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:18,984 INFO L225 Difference]: With dead ends: 353 [2021-11-06 11:28:18,984 INFO L226 Difference]: Without dead ends: 220 [2021-11-06 11:28:18,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:28:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-06 11:28:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2021-11-06 11:28:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 214 states have (on average 1.2383177570093458) internal successors, (265), 215 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 265 transitions. [2021-11-06 11:28:18,992 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 265 transitions. Word has length 92 [2021-11-06 11:28:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:18,992 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 265 transitions. [2021-11-06 11:28:18,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:18,993 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 265 transitions. [2021-11-06 11:28:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 11:28:18,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:18,994 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:19,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-06 11:28:19,195 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 [2021-11-06 11:28:19,195 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash -675443141, now seen corresponding path program 1 times [2021-11-06 11:28:19,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:19,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476750408] [2021-11-06 11:28:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:19,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:19,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:19,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842582663] [2021-11-06 11:28:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:19,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:19,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:19,244 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) [2021-11-06 11:28:19,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-06 11:28:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 2724 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-06 11:28:20,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:28:21,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:21,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476750408] [2021-11-06 11:28:21,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:21,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842582663] [2021-11-06 11:28:21,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842582663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:21,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:21,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-06 11:28:21,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061120182] [2021-11-06 11:28:21,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 11:28:21,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 11:28:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-06 11:28:21,722 INFO L87 Difference]: Start difference. First operand 216 states and 265 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:31,920 INFO L93 Difference]: Finished difference Result 728 states and 881 transitions. [2021-11-06 11:28:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-06 11:28:31,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-06 11:28:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:31,924 INFO L225 Difference]: With dead ends: 728 [2021-11-06 11:28:31,924 INFO L226 Difference]: Without dead ends: 605 [2021-11-06 11:28:31,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-11-06 11:28:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-06 11:28:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 227. [2021-11-06 11:28:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.2444444444444445) internal successors, (280), 226 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 280 transitions. [2021-11-06 11:28:31,935 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 280 transitions. Word has length 92 [2021-11-06 11:28:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:31,936 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 280 transitions. [2021-11-06 11:28:31,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 280 transitions. [2021-11-06 11:28:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 11:28:31,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:31,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:31,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-06 11:28:32,143 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 [2021-11-06 11:28:32,143 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash 711342269, now seen corresponding path program 1 times [2021-11-06 11:28:32,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:32,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745135227] [2021-11-06 11:28:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:32,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:32,193 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:32,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966463869] [2021-11-06 11:28:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:32,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:32,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:32,194 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) [2021-11-06 11:28:32,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-06 11:28:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:33,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 2719 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 11:28:33,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:28:33,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:33,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745135227] [2021-11-06 11:28:33,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:33,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966463869] [2021-11-06 11:28:33,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966463869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:33,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:33,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:28:33,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926605615] [2021-11-06 11:28:33,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:28:33,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:28:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:28:33,292 INFO L87 Difference]: Start difference. First operand 227 states and 280 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:33,510 INFO L93 Difference]: Finished difference Result 425 states and 528 transitions. [2021-11-06 11:28:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:28:33,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-06 11:28:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:33,512 INFO L225 Difference]: With dead ends: 425 [2021-11-06 11:28:33,512 INFO L226 Difference]: Without dead ends: 245 [2021-11-06 11:28:33,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:28:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-06 11:28:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 233. [2021-11-06 11:28:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2021-11-06 11:28:33,521 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 92 [2021-11-06 11:28:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:33,521 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2021-11-06 11:28:33,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2021-11-06 11:28:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-06 11:28:33,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:33,522 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:33,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-06 11:28:33,723 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 [2021-11-06 11:28:33,723 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1723254047, now seen corresponding path program 1 times [2021-11-06 11:28:33,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:33,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987237039] [2021-11-06 11:28:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:33,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:33,774 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:33,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383951661] [2021-11-06 11:28:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:33,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:33,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:33,776 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) [2021-11-06 11:28:33,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-06 11:28:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:35,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-06 11:28:35,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:35,063 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 [2021-11-06 11:28:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:28:35,970 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 [2021-11-06 11:28:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:28:36,002 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 [2021-11-06 11:28:36,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:28:36,100 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 21 treesize of output 20 [2021-11-06 11:28:36,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:28:36,120 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 21 treesize of output 20 [2021-11-06 11:28:36,391 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-06 11:28:36,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-06 11:28:36,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:28:36,625 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-06 11:28:36,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 58 [2021-11-06 11:28:36,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:28:36,679 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-06 11:28:36,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 43 [2021-11-06 11:28:37,672 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-11-06 11:28:37,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 61 [2021-11-06 11:28:37,752 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-11-06 11:28:37,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 54 [2021-11-06 11:28:37,973 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 7 treesize of output 3 [2021-11-06 11:28:37,983 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 7 treesize of output 3 [2021-11-06 11:28:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:28:38,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:38,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987237039] [2021-11-06 11:28:38,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:38,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383951661] [2021-11-06 11:28:38,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383951661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:38,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:38,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-06 11:28:38,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675372284] [2021-11-06 11:28:38,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-06 11:28:38,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-06 11:28:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-06 11:28:38,297 INFO L87 Difference]: Start difference. First operand 233 states and 285 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:28:56,869 INFO L93 Difference]: Finished difference Result 610 states and 752 transitions. [2021-11-06 11:28:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-06 11:28:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-06 11:28:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:28:56,871 INFO L225 Difference]: With dead ends: 610 [2021-11-06 11:28:56,871 INFO L226 Difference]: Without dead ends: 450 [2021-11-06 11:28:56,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-11-06 11:28:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-06 11:28:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 263. [2021-11-06 11:28:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 261 states have (on average 1.2298850574712643) internal successors, (321), 262 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 321 transitions. [2021-11-06 11:28:56,884 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 321 transitions. Word has length 94 [2021-11-06 11:28:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:28:56,885 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 321 transitions. [2021-11-06 11:28:56,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:28:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 321 transitions. [2021-11-06 11:28:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-06 11:28:56,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:28:56,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:28:56,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-06 11:28:57,095 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 [2021-11-06 11:28:57,095 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:28:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:28:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash -462336797, now seen corresponding path program 1 times [2021-11-06 11:28:57,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:28:57,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118358156] [2021-11-06 11:28:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:57,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:28:57,143 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:28:57,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553792853] [2021-11-06 11:28:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:28:57,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:28:57,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:28:57,144 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) [2021-11-06 11:28:57,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-06 11:28:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:28:58,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 2724 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-06 11:28:58,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:28:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:28:58,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:28:58,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118358156] [2021-11-06 11:28:58,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:28:58,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553792853] [2021-11-06 11:28:58,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553792853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:28:58,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:28:58,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:28:58,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623608752] [2021-11-06 11:28:58,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:28:58,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:28:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:28:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:28:58,464 INFO L87 Difference]: Start difference. First operand 263 states and 321 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:29:03,792 INFO L93 Difference]: Finished difference Result 557 states and 682 transitions. [2021-11-06 11:29:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 11:29:03,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-06 11:29:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:29:03,794 INFO L225 Difference]: With dead ends: 557 [2021-11-06 11:29:03,794 INFO L226 Difference]: Without dead ends: 358 [2021-11-06 11:29:03,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:29:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-06 11:29:03,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 268. [2021-11-06 11:29:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 266 states have (on average 1.2255639097744362) internal successors, (326), 267 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:03,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 326 transitions. [2021-11-06 11:29:03,805 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 326 transitions. Word has length 94 [2021-11-06 11:29:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:29:03,806 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 326 transitions. [2021-11-06 11:29:03,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 326 transitions. [2021-11-06 11:29:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-06 11:29:03,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:29:03,809 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:29:03,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-06 11:29:04,009 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 [2021-11-06 11:29:04,009 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:29:04,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:29:04,010 INFO L85 PathProgramCache]: Analyzing trace with hash 413682209, now seen corresponding path program 1 times [2021-11-06 11:29:04,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:29:04,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546920655] [2021-11-06 11:29:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:29:04,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:29:04,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:29:04,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948321529] [2021-11-06 11:29:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:29:04,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:29:04,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:29:04,067 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) [2021-11-06 11:29:04,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-06 11:29:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:29:05,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-06 11:29:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:29:05,498 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 [2021-11-06 11:29:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:06,437 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 [2021-11-06 11:29:06,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:06,460 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 [2021-11-06 11:29:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:06,556 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 21 treesize of output 20 [2021-11-06 11:29:06,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:06,583 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 21 treesize of output 20 [2021-11-06 11:29:06,862 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-06 11:29:06,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-06 11:29:07,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:07,091 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-06 11:29:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 58 [2021-11-06 11:29:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:07,161 INFO L354 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-11-06 11:29:07,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 43 [2021-11-06 11:29:08,132 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-06 11:29:08,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-11-06 11:29:08,179 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-06 11:29:08,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2021-11-06 11:29:08,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-06 11:29:08,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2021-11-06 11:29:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:29:09,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:29:09,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546920655] [2021-11-06 11:29:09,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:29:09,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948321529] [2021-11-06 11:29:09,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948321529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:29:09,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:29:09,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-06 11:29:09,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451422437] [2021-11-06 11:29:09,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-06 11:29:09,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:29:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-06 11:29:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-11-06 11:29:09,055 INFO L87 Difference]: Start difference. First operand 268 states and 326 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:29:43,345 INFO L93 Difference]: Finished difference Result 693 states and 845 transitions. [2021-11-06 11:29:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-06 11:29:43,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-06 11:29:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:29:43,347 INFO L225 Difference]: With dead ends: 693 [2021-11-06 11:29:43,347 INFO L226 Difference]: Without dead ends: 542 [2021-11-06 11:29:43,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=250, Invalid=1472, Unknown=0, NotChecked=0, Total=1722 [2021-11-06 11:29:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-06 11:29:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 275. [2021-11-06 11:29:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 1.2197802197802199) internal successors, (333), 274 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 333 transitions. [2021-11-06 11:29:43,360 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 333 transitions. Word has length 94 [2021-11-06 11:29:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:29:43,361 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 333 transitions. [2021-11-06 11:29:43,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 333 transitions. [2021-11-06 11:29:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-06 11:29:43,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:29:43,362 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:29:43,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-06 11:29:43,575 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 [2021-11-06 11:29:43,575 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:29:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:29:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash 53717091, now seen corresponding path program 1 times [2021-11-06 11:29:43,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:29:43,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103048158] [2021-11-06 11:29:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:29:43,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:29:43,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:29:43,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88441930] [2021-11-06 11:29:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:29:43,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:29:43,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:29:43,627 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) [2021-11-06 11:29:43,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-06 11:29:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:29:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 2734 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 11:29:44,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:29:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:29:44,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:29:44,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103048158] [2021-11-06 11:29:44,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:29:44,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88441930] [2021-11-06 11:29:44,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88441930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:29:44,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:29:44,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:29:44,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357353452] [2021-11-06 11:29:44,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:29:44,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:29:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:29:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:29:44,911 INFO L87 Difference]: Start difference. First operand 275 states and 333 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:29:44,984 INFO L93 Difference]: Finished difference Result 423 states and 511 transitions. [2021-11-06 11:29:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:29:44,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-06 11:29:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:29:44,986 INFO L225 Difference]: With dead ends: 423 [2021-11-06 11:29:44,986 INFO L226 Difference]: Without dead ends: 272 [2021-11-06 11:29:44,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:29:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-06 11:29:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2021-11-06 11:29:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 267 states have (on average 1.2097378277153559) internal successors, (323), 268 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 323 transitions. [2021-11-06 11:29:44,997 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 323 transitions. Word has length 94 [2021-11-06 11:29:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:29:44,997 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 323 transitions. [2021-11-06 11:29:44,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 323 transitions. [2021-11-06 11:29:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-06 11:29:44,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:29:44,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:29:45,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-06 11:29:45,211 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 [2021-11-06 11:29:45,211 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:29:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:29:45,212 INFO L85 PathProgramCache]: Analyzing trace with hash -955936525, now seen corresponding path program 1 times [2021-11-06 11:29:45,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:29:45,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916192640] [2021-11-06 11:29:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:29:45,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:29:45,258 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:29:45,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599722023] [2021-11-06 11:29:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:29:45,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:29:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:29:45,260 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) [2021-11-06 11:29:45,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-06 11:29:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:29:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2754 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-06 11:29:46,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:29:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:29:46,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:29:46,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916192640] [2021-11-06 11:29:46,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:29:46,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599722023] [2021-11-06 11:29:46,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599722023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:29:46,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:29:46,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 11:29:46,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898645113] [2021-11-06 11:29:46,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 11:29:46,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:29:46,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 11:29:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:29:46,888 INFO L87 Difference]: Start difference. First operand 269 states and 323 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:29:47,933 INFO L93 Difference]: Finished difference Result 633 states and 755 transitions. [2021-11-06 11:29:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 11:29:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-06 11:29:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:29:47,935 INFO L225 Difference]: With dead ends: 633 [2021-11-06 11:29:47,935 INFO L226 Difference]: Without dead ends: 498 [2021-11-06 11:29:47,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-06 11:29:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-06 11:29:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 269. [2021-11-06 11:29:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 267 states have (on average 1.205992509363296) internal successors, (322), 268 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 322 transitions. [2021-11-06 11:29:47,948 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 322 transitions. Word has length 95 [2021-11-06 11:29:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:29:47,949 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 322 transitions. [2021-11-06 11:29:47,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:29:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 322 transitions. [2021-11-06 11:29:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 11:29:47,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:29:47,950 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:29:47,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-06 11:29:48,174 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 [2021-11-06 11:29:48,175 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:29:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:29:48,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1136218909, now seen corresponding path program 1 times [2021-11-06 11:29:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:29:48,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861352298] [2021-11-06 11:29:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:29:48,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:29:48,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:29:48,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155921258] [2021-11-06 11:29:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:29:48,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:29:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:29:48,250 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) [2021-11-06 11:29:48,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-06 11:29:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:29:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 151 conjunts are in the unsatisfiable core [2021-11-06 11:29:49,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:29:49,962 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 [2021-11-06 11:29:50,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:50,568 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 31 treesize of output 15 [2021-11-06 11:29:51,372 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-06 11:29:51,372 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 [2021-11-06 11:29:51,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:51,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:51,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:51,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-11-06 11:29:51,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:51,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:51,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2021-11-06 11:29:52,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:52,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:52,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:52,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-06 11:29:52,592 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-06 11:29:52,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2021-11-06 11:29:52,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 11:29:52,816 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-06 11:29:52,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2021-11-06 11:30:00,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-06 11:30:05,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-06 11:30:05,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2021-11-06 11:30:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 11:30:06,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:30:06,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861352298] [2021-11-06 11:30:06,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:30:06,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155921258] [2021-11-06 11:30:06,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155921258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:30:06,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:30:06,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-06 11:30:06,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786054522] [2021-11-06 11:30:06,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-06 11:30:06,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:30:06,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-06 11:30:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=429, Unknown=4, NotChecked=0, Total=506 [2021-11-06 11:30:06,409 INFO L87 Difference]: Start difference. First operand 269 states and 322 transitions. Second operand has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:30:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:30:55,729 INFO L93 Difference]: Finished difference Result 677 states and 813 transitions. [2021-11-06 11:30:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-06 11:30:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-06 11:30:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:30:55,731 INFO L225 Difference]: With dead ends: 677 [2021-11-06 11:30:55,731 INFO L226 Difference]: Without dead ends: 548 [2021-11-06 11:30:55,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=167, Invalid=950, Unknown=5, NotChecked=0, Total=1122 [2021-11-06 11:30:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-06 11:30:55,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 319. [2021-11-06 11:30:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 317 states have (on average 1.2113564668769716) internal successors, (384), 318 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:30:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 384 transitions. [2021-11-06 11:30:55,750 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 384 transitions. Word has length 97 [2021-11-06 11:30:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:30:55,751 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 384 transitions. [2021-11-06 11:30:55,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:30:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 384 transitions. [2021-11-06 11:30:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 11:30:55,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:30:55,752 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:30:55,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-06 11:30:55,967 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 [2021-11-06 11:30:55,967 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:30:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:30:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1279617441, now seen corresponding path program 1 times [2021-11-06 11:30:55,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:30:55,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612893713] [2021-11-06 11:30:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:30:55,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:30:56,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:30:56,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427753762] [2021-11-06 11:30:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:30:56,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:30:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:30:56,026 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) [2021-11-06 11:30:56,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-06 11:41:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:41:59,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 11:41:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:41:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:41:59,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:41:59,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612893713] [2021-11-06 11:41:59,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 11:41:59,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427753762] [2021-11-06 11:41:59,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427753762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:41:59,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:41:59,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-06 11:41:59,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105069994] [2021-11-06 11:41:59,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:41:59,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:41:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:41:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:41:59,804 INFO L87 Difference]: Start difference. First operand 319 states and 384 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:42:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:42:00,138 INFO L93 Difference]: Finished difference Result 667 states and 804 transitions. [2021-11-06 11:42:00,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:42:00,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-06 11:42:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:42:00,140 INFO L225 Difference]: With dead ends: 667 [2021-11-06 11:42:00,140 INFO L226 Difference]: Without dead ends: 536 [2021-11-06 11:42:00,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:42:00,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-06 11:42:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 334. [2021-11-06 11:42:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 332 states have (on average 1.213855421686747) internal successors, (403), 333 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:42:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 403 transitions. [2021-11-06 11:42:00,157 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 403 transitions. Word has length 97 [2021-11-06 11:42:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:42:00,158 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 403 transitions. [2021-11-06 11:42:00,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:42:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 403 transitions. [2021-11-06 11:42:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 11:42:00,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:42:00,159 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 11:42:00,367 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forcibly destroying the process [2021-11-06 11:42:00,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-06 11:42:00,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-06 11:42:00,424 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:42:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:42:00,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1134815216, now seen corresponding path program 2 times [2021-11-06 11:42:00,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:42:00,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927889672] [2021-11-06 11:42:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:42:00,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:42:00,473 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 11:42:00,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862562250] [2021-11-06 11:42:00,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 11:42:00,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:42:00,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:42:00,475 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:42:00,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process Killed by 15