./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:13:58,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:13:58,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:13:58,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:13:58,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:13:58,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:13:58,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:13:58,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:13:58,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:13:58,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:13:58,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:13:58,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:13:58,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:13:58,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:13:58,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:13:58,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:13:58,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:13:58,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:13:58,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:13:58,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:13:58,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:13:58,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:13:58,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:13:58,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:13:58,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:13:58,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:13:58,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:13:58,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:13:58,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:13:58,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:13:58,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:13:58,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:13:58,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:13:58,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:13:58,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:13:58,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:13:58,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:13:58,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:13:58,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:13:58,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:13:58,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:13:58,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-07 00:13:58,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:13:58,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:13:58,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:13:58,359 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:13:58,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:13:58,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:13:58,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:13:58,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:13:58,361 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:13:58,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:13:58,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:13:58,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:13:58,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:13:58,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:13:58,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:13:58,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:13:58,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:13:58,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:13:58,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:13:58,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:13:58,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:13:58,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:13:58,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:13:58,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:13:58,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:13:58,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:13:58,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:13:58,363 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:13:58,364 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:13:58,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:13:58,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:13:58,364 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-12-07 00:13:58,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:13:58,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:13:58,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:13:58,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:13:58,552 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:13:58,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-12-07 00:13:58,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data/eae67a16b/3e11aef7814f4c1da3d9aeb61fd60779/FLAG163d99d79 [2021-12-07 00:13:59,183 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:13:59,183 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-12-07 00:13:59,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data/eae67a16b/3e11aef7814f4c1da3d9aeb61fd60779/FLAG163d99d79 [2021-12-07 00:13:59,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data/eae67a16b/3e11aef7814f4c1da3d9aeb61fd60779 [2021-12-07 00:13:59,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:13:59,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:13:59,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:13:59,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:13:59,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:13:59,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:13:59" (1/1) ... [2021-12-07 00:13:59,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c913238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:13:59, skipping insertion in model container [2021-12-07 00:13:59,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:13:59" (1/1) ... [2021-12-07 00:13:59,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:13:59,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:13:59,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-12-07 00:13:59,871 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-12-07 00:14:00,377 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 00:14:00,421 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,422 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,422 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,423 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,424 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,433 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,433 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,435 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,679 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 00:14:00,680 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 00:14:00,681 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 00:14:00,682 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 00:14:00,682 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 00:14:00,683 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 00:14:00,683 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 00:14:00,684 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 00:14:00,684 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 00:14:00,685 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 00:14:00,794 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,794 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:14:00,857 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:14:00,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-12-07 00:14:00,867 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-12-07 00:14:00,890 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 00:14:00,901 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,901 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,901 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,902 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,902 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,907 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,908 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,909 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,909 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,933 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 00:14:00,934 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 00:14:00,935 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 00:14:00,935 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 00:14:00,936 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 00:14:00,936 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 00:14:00,937 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 00:14:00,937 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 00:14:00,938 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 00:14:00,938 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 00:14:00,961 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,961 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:14:00,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:14:01,154 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:14:01,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01 WrapperNode [2021-12-07 00:14:01,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:14:01,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:14:01,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:14:01,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:14:01,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,271 INFO L137 Inliner]: procedures = 689, calls = 1497, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 598 [2021-12-07 00:14:01,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:14:01,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:14:01,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:14:01,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:14:01,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:14:01,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:14:01,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:14:01,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:14:01,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (1/1) ... [2021-12-07 00:14:01,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:14:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:01,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:14:01,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:14:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-07 00:14:01,410 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-07 00:14:01,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:14:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-07 00:14:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-07 00:14:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-07 00:14:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-07 00:14:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-07 00:14:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-07 00:14:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:14:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-07 00:14:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-07 00:14:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 00:14:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 00:14:01,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 00:14:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:14:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 00:14:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:14:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:14:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2021-12-07 00:14:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2021-12-07 00:14:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-07 00:14:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-07 00:14:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-07 00:14:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-07 00:14:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-12-07 00:14:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-12-07 00:14:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-07 00:14:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-07 00:14:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 00:14:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 00:14:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:14:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 00:14:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 00:14:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-07 00:14:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-07 00:14:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-07 00:14:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-07 00:14:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:14:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-07 00:14:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-07 00:14:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-07 00:14:01,414 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-07 00:14:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-12-07 00:14:01,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-12-07 00:14:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:14:01,590 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:14:01,592 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:14:02,315 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:14:02,321 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:14:02,321 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-07 00:14:02,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:14:02 BoogieIcfgContainer [2021-12-07 00:14:02,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:14:02,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:14:02,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:14:02,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:14:02,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:13:59" (1/3) ... [2021-12-07 00:14:02,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd8e207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:14:02, skipping insertion in model container [2021-12-07 00:14:02,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:14:01" (2/3) ... [2021-12-07 00:14:02,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd8e207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:14:02, skipping insertion in model container [2021-12-07 00:14:02,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:14:02" (3/3) ... [2021-12-07 00:14:02,328 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-12-07 00:14:02,332 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:14:02,332 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:14:02,368 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:14:02,373 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:14:02,373 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:14:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-07 00:14:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-07 00:14:02,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:02,400 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:02,401 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash 432166812, now seen corresponding path program 1 times [2021-12-07 00:14:02,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:02,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938952395] [2021-12-07 00:14:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:02,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:14:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 00:14:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 00:14:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-07 00:14:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:14:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 00:14:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:14:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:14:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 00:14:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 00:14:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 00:14:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-07 00:14:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:14:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:02,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 00:14:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 00:14:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-07 00:14:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-07 00:14:03,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:03,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938952395] [2021-12-07 00:14:03,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938952395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:03,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:03,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:14:03,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520488926] [2021-12-07 00:14:03,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:03,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:14:03,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:03,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:14:03,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:14:03,056 INFO L87 Difference]: Start difference. First operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-07 00:14:03,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:03,402 INFO L93 Difference]: Finished difference Result 361 states and 504 transitions. [2021-12-07 00:14:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:14:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2021-12-07 00:14:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:03,417 INFO L225 Difference]: With dead ends: 361 [2021-12-07 00:14:03,417 INFO L226 Difference]: Without dead ends: 202 [2021-12-07 00:14:03,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:14:03,426 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 89 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:03,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 305 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:14:03,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-07 00:14:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-12-07 00:14:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-07 00:14:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-12-07 00:14:03,474 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 105 [2021-12-07 00:14:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:03,474 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-12-07 00:14:03,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-07 00:14:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-12-07 00:14:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 00:14:03,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:03,479 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:03,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:14:03,480 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672400, now seen corresponding path program 1 times [2021-12-07 00:14:03,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:03,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922587468] [2021-12-07 00:14:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:03,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:14:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 00:14:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 00:14:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-07 00:14:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:14:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 00:14:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:14:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:14:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 00:14:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 00:14:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-07 00:14:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-07 00:14:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:14:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 00:14:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 00:14:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:14:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:14:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-07 00:14:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-07 00:14:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-07 00:14:03,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:03,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922587468] [2021-12-07 00:14:03,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922587468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:03,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:03,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:14:03,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172768438] [2021-12-07 00:14:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:03,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:14:03,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:03,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:14:03,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:14:03,853 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:14:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:04,324 INFO L93 Difference]: Finished difference Result 341 states and 448 transitions. [2021-12-07 00:14:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:14:04,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 122 [2021-12-07 00:14:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:04,329 INFO L225 Difference]: With dead ends: 341 [2021-12-07 00:14:04,329 INFO L226 Difference]: Without dead ends: 245 [2021-12-07 00:14:04,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:14:04,332 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 278 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:04,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 662 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:14:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-07 00:14:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2021-12-07 00:14:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-07 00:14:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 200 transitions. [2021-12-07 00:14:04,359 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 200 transitions. Word has length 122 [2021-12-07 00:14:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:04,360 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 200 transitions. [2021-12-07 00:14:04,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:14:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 200 transitions. [2021-12-07 00:14:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-07 00:14:04,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:04,364 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:04,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:14:04,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:04,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2103837312, now seen corresponding path program 1 times [2021-12-07 00:14:04,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:04,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166643122] [2021-12-07 00:14:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:04,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:14:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-07 00:14:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 00:14:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-07 00:14:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:14:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 00:14:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-07 00:14:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:14:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 00:14:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-07 00:14:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:14:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-07 00:14:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-07 00:14:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:14:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-07 00:14:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-07 00:14:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:14:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:14:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-07 00:14:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-07 00:14:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-07 00:14:04,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:04,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166643122] [2021-12-07 00:14:04,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166643122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:04,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:04,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 00:14:04,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333475955] [2021-12-07 00:14:04,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:04,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:14:04,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:04,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:14:04,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:14:04,749 INFO L87 Difference]: Start difference. First operand 160 states and 200 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-07 00:14:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:05,333 INFO L93 Difference]: Finished difference Result 371 states and 489 transitions. [2021-12-07 00:14:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:14:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 130 [2021-12-07 00:14:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:05,336 INFO L225 Difference]: With dead ends: 371 [2021-12-07 00:14:05,336 INFO L226 Difference]: Without dead ends: 226 [2021-12-07 00:14:05,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:14:05,338 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 238 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:05,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 963 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:14:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-07 00:14:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2021-12-07 00:14:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 111 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-12-07 00:14:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2021-12-07 00:14:05,360 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 130 [2021-12-07 00:14:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:05,360 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2021-12-07 00:14:05,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-07 00:14:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2021-12-07 00:14:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-07 00:14:05,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:05,364 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:05,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:14:05,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:05,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:05,365 INFO L85 PathProgramCache]: Analyzing trace with hash -209170488, now seen corresponding path program 1 times [2021-12-07 00:14:05,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:05,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642031254] [2021-12-07 00:14:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:05,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:05,418 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:05,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971475780] [2021-12-07 00:14:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:05,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:05,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:05,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:14:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:14:05,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:14:05,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:05,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:05,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642031254] [2021-12-07 00:14:05,929 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:05,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971475780] [2021-12-07 00:14:05,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971475780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:05,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:05,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:14:05,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805539907] [2021-12-07 00:14:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:05,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:14:05,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:14:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:14:05,931 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-07 00:14:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:06,046 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2021-12-07 00:14:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:14:06,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2021-12-07 00:14:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:06,049 INFO L225 Difference]: With dead ends: 261 [2021-12-07 00:14:06,049 INFO L226 Difference]: Without dead ends: 162 [2021-12-07 00:14:06,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:14:06,051 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 235 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:06,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 802 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:14:06,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-07 00:14:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-07 00:14:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-12-07 00:14:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2021-12-07 00:14:06,066 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 145 [2021-12-07 00:14:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:06,067 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2021-12-07 00:14:06,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-07 00:14:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2021-12-07 00:14:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-07 00:14:06,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:06,070 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:06,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:14:06,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:06,271 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:06,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1337604585, now seen corresponding path program 1 times [2021-12-07 00:14:06,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:06,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315084349] [2021-12-07 00:14:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:06,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:06,329 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:06,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609532855] [2021-12-07 00:14:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:06,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:06,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:06,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:06,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:14:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:06,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:14:06,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-07 00:14:06,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:06,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:06,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315084349] [2021-12-07 00:14:06,805 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:06,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609532855] [2021-12-07 00:14:06,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609532855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:06,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:06,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 00:14:06,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704271537] [2021-12-07 00:14:06,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:06,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:14:06,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:14:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:14:06,807 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-07 00:14:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:06,988 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2021-12-07 00:14:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:14:06,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 161 [2021-12-07 00:14:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:06,990 INFO L225 Difference]: With dead ends: 274 [2021-12-07 00:14:06,990 INFO L226 Difference]: Without dead ends: 162 [2021-12-07 00:14:06,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:14:06,991 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 300 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:06,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1070 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:14:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-07 00:14:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-07 00:14:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-07 00:14:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2021-12-07 00:14:07,000 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 161 [2021-12-07 00:14:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:07,000 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2021-12-07 00:14:07,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-07 00:14:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2021-12-07 00:14:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-07 00:14:07,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:07,002 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:07,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:14:07,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:07,204 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash 996052163, now seen corresponding path program 1 times [2021-12-07 00:14:07,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:07,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785184481] [2021-12-07 00:14:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:07,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:07,355 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:07,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561238447] [2021-12-07 00:14:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:07,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:07,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:07,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:07,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:14:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:07,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:14:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-07 00:14:07,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:07,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:07,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785184481] [2021-12-07 00:14:07,903 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:07,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561238447] [2021-12-07 00:14:07,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561238447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:07,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:07,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:14:07,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402789508] [2021-12-07 00:14:07,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:07,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:14:07,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:07,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:14:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:14:07,905 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:08,091 INFO L93 Difference]: Finished difference Result 286 states and 356 transitions. [2021-12-07 00:14:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:14:08,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-12-07 00:14:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:08,093 INFO L225 Difference]: With dead ends: 286 [2021-12-07 00:14:08,094 INFO L226 Difference]: Without dead ends: 180 [2021-12-07 00:14:08,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:14:08,095 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 21 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:08,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 897 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:14:08,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-07 00:14:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2021-12-07 00:14:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 115 states have internal predecessors, (136), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-07 00:14:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2021-12-07 00:14:08,104 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 176 [2021-12-07 00:14:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:08,105 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2021-12-07 00:14:08,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2021-12-07 00:14:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-07 00:14:08,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:08,107 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:08,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:14:08,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 00:14:08,309 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash 28701509, now seen corresponding path program 1 times [2021-12-07 00:14:08,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:08,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562507845] [2021-12-07 00:14:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:08,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:08,432 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:08,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699305344] [2021-12-07 00:14:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:08,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:08,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:08,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:14:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:14:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-07 00:14:08,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:08,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562507845] [2021-12-07 00:14:08,879 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699305344] [2021-12-07 00:14:08,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699305344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:08,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:08,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:14:08,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546347529] [2021-12-07 00:14:08,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:08,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:14:08,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:08,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:14:08,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:14:08,881 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:08,905 INFO L93 Difference]: Finished difference Result 274 states and 339 transitions. [2021-12-07 00:14:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:14:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-12-07 00:14:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:08,908 INFO L225 Difference]: With dead ends: 274 [2021-12-07 00:14:08,908 INFO L226 Difference]: Without dead ends: 170 [2021-12-07 00:14:08,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:14:08,909 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 3 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:08,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 583 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-07 00:14:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2021-12-07 00:14:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 117 states have internal predecessors, (138), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-07 00:14:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-12-07 00:14:08,920 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 176 [2021-12-07 00:14:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:08,920 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-12-07 00:14:08,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:08,921 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-12-07 00:14:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-07 00:14:08,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:08,922 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:08,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:14:09,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:09,124 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash -463924665, now seen corresponding path program 1 times [2021-12-07 00:14:09,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:09,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174514656] [2021-12-07 00:14:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:09,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:09,294 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:09,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148534012] [2021-12-07 00:14:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:09,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:09,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:09,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:09,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:14:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:09,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:14:09,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-07 00:14:09,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-07 00:14:09,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:09,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174514656] [2021-12-07 00:14:09,941 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:09,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148534012] [2021-12-07 00:14:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148534012] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:09,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:14:09,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-07 00:14:09,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968962595] [2021-12-07 00:14:09,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:09,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:14:09,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:14:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:14:09,942 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-07 00:14:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:09,975 INFO L93 Difference]: Finished difference Result 178 states and 222 transitions. [2021-12-07 00:14:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:14:09,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 176 [2021-12-07 00:14:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:09,977 INFO L225 Difference]: With dead ends: 178 [2021-12-07 00:14:09,977 INFO L226 Difference]: Without dead ends: 176 [2021-12-07 00:14:09,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:14:09,978 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:09,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 978 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-07 00:14:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-12-07 00:14:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 122 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-07 00:14:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 219 transitions. [2021-12-07 00:14:09,988 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 219 transitions. Word has length 176 [2021-12-07 00:14:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:09,988 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 219 transitions. [2021-12-07 00:14:09,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-07 00:14:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 219 transitions. [2021-12-07 00:14:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-07 00:14:09,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:09,990 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:10,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 00:14:10,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:10,191 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1104137534, now seen corresponding path program 1 times [2021-12-07 00:14:10,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:10,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040691440] [2021-12-07 00:14:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:10,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:10,237 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:10,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385597683] [2021-12-07 00:14:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:10,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:10,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:10,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:10,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:14:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 00:14:10,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-07 00:14:10,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:10,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:10,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040691440] [2021-12-07 00:14:10,662 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:10,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385597683] [2021-12-07 00:14:10,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385597683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:10,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:10,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:14:10,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616149034] [2021-12-07 00:14:10,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:10,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:14:10,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:14:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:14:10,664 INFO L87 Difference]: Start difference. First operand 175 states and 219 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-07 00:14:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:10,704 INFO L93 Difference]: Finished difference Result 281 states and 350 transitions. [2021-12-07 00:14:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:14:10,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 176 [2021-12-07 00:14:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:10,706 INFO L225 Difference]: With dead ends: 281 [2021-12-07 00:14:10,706 INFO L226 Difference]: Without dead ends: 175 [2021-12-07 00:14:10,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:14:10,708 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 13 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:10,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 950 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-07 00:14:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-12-07 00:14:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-07 00:14:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2021-12-07 00:14:10,717 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 176 [2021-12-07 00:14:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:10,717 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2021-12-07 00:14:10,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-07 00:14:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2021-12-07 00:14:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-07 00:14:10,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:10,719 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:10,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-07 00:14:10,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:14:10,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1406424536, now seen corresponding path program 1 times [2021-12-07 00:14:10,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:10,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520074461] [2021-12-07 00:14:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:10,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:10,960 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:10,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61355337] [2021-12-07 00:14:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:10,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:10,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:10,961 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:10,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:14:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 00:14:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-07 00:14:11,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:11,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:11,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520074461] [2021-12-07 00:14:11,413 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:11,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61355337] [2021-12-07 00:14:11,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61355337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:11,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:11,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:14:11,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123477509] [2021-12-07 00:14:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:11,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:14:11,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:14:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:14:11,415 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-07 00:14:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:11,460 INFO L93 Difference]: Finished difference Result 283 states and 351 transitions. [2021-12-07 00:14:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:14:11,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 177 [2021-12-07 00:14:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:11,462 INFO L225 Difference]: With dead ends: 283 [2021-12-07 00:14:11,462 INFO L226 Difference]: Without dead ends: 177 [2021-12-07 00:14:11,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:14:11,463 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 18 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:11,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 948 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-07 00:14:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-12-07 00:14:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 123 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-07 00:14:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 219 transitions. [2021-12-07 00:14:11,473 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 219 transitions. Word has length 177 [2021-12-07 00:14:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:11,473 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 219 transitions. [2021-12-07 00:14:11,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-07 00:14:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 219 transitions. [2021-12-07 00:14:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-07 00:14:11,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:11,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:11,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-07 00:14:11,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:11,677 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:11,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:11,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1080671750, now seen corresponding path program 1 times [2021-12-07 00:14:11,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:11,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129402844] [2021-12-07 00:14:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:11,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:11,757 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:11,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926764459] [2021-12-07 00:14:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:11,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:11,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:11,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:14:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:12,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:14:12,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-07 00:14:12,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:12,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129402844] [2021-12-07 00:14:12,160 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926764459] [2021-12-07 00:14:12,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926764459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:12,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:12,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:14:12,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021046735] [2021-12-07 00:14:12,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:12,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:14:12,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:14:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:14:12,162 INFO L87 Difference]: Start difference. First operand 176 states and 219 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:12,193 INFO L93 Difference]: Finished difference Result 293 states and 372 transitions. [2021-12-07 00:14:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:14:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-12-07 00:14:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:12,195 INFO L225 Difference]: With dead ends: 293 [2021-12-07 00:14:12,195 INFO L226 Difference]: Without dead ends: 181 [2021-12-07 00:14:12,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:14:12,196 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 7 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:12,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:12,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-07 00:14:12,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-12-07 00:14:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 124 states have internal predecessors, (143), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-07 00:14:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2021-12-07 00:14:12,208 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 179 [2021-12-07 00:14:12,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:12,209 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2021-12-07 00:14:12,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2021-12-07 00:14:12,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-07 00:14:12,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:12,211 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:12,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:14:12,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:12,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:12,414 INFO L85 PathProgramCache]: Analyzing trace with hash 712361510, now seen corresponding path program 1 times [2021-12-07 00:14:12,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:12,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304863648] [2021-12-07 00:14:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:12,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:12,489 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:12,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489386978] [2021-12-07 00:14:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:12,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:12,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:12,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:12,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:14:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:12,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 00:14:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:13,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-12-07 00:14:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-07 00:14:13,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:13,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:13,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304863648] [2021-12-07 00:14:13,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:13,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489386978] [2021-12-07 00:14:13,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489386978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:13,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:13,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 00:14:13,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51065638] [2021-12-07 00:14:13,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:13,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:14:13,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:14:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:14:13,091 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-07 00:14:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:13,371 INFO L93 Difference]: Finished difference Result 319 states and 401 transitions. [2021-12-07 00:14:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:14:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 179 [2021-12-07 00:14:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:13,373 INFO L225 Difference]: With dead ends: 319 [2021-12-07 00:14:13,373 INFO L226 Difference]: Without dead ends: 202 [2021-12-07 00:14:13,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:14:13,375 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 107 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:13,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1490 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:14:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-07 00:14:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2021-12-07 00:14:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 138 states have internal predecessors, (161), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 36 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-07 00:14:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 241 transitions. [2021-12-07 00:14:13,387 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 241 transitions. Word has length 179 [2021-12-07 00:14:13,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:13,388 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 241 transitions. [2021-12-07 00:14:13,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-07 00:14:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 241 transitions. [2021-12-07 00:14:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-07 00:14:13,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:13,390 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:13,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:14:13,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:13,590 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1965868264, now seen corresponding path program 1 times [2021-12-07 00:14:13,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:13,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888227689] [2021-12-07 00:14:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:13,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:13,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:13,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944567622] [2021-12-07 00:14:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:13,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:13,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:13,637 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:13,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:14:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:14:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:14,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2021-12-07 00:14:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-07 00:14:14,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:14,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:14,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888227689] [2021-12-07 00:14:14,210 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:14,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944567622] [2021-12-07 00:14:14,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944567622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:14,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:14,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:14:14,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372800448] [2021-12-07 00:14:14,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:14,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:14:14,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:14:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:14:14,211 INFO L87 Difference]: Start difference. First operand 192 states and 241 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:14,230 INFO L93 Difference]: Finished difference Result 307 states and 387 transitions. [2021-12-07 00:14:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:14:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-12-07 00:14:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:14,232 INFO L225 Difference]: With dead ends: 307 [2021-12-07 00:14:14,232 INFO L226 Difference]: Without dead ends: 198 [2021-12-07 00:14:14,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:14:14,233 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 4 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:14,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 789 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-07 00:14:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2021-12-07 00:14:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 136 states have (on average 1.1985294117647058) internal successors, (163), 139 states have internal predecessors, (163), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 37 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-07 00:14:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 243 transitions. [2021-12-07 00:14:14,241 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 243 transitions. Word has length 179 [2021-12-07 00:14:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:14,241 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 243 transitions. [2021-12-07 00:14:14,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:14,242 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 243 transitions. [2021-12-07 00:14:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-07 00:14:14,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:14,243 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:14,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:14:14,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 00:14:14,443 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1941254556, now seen corresponding path program 1 times [2021-12-07 00:14:14,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:14,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656752276] [2021-12-07 00:14:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:14,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:14,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:14,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189483292] [2021-12-07 00:14:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:14,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:14,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:14,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:14,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:14:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:14,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:14:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2021-12-07 00:14:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-07 00:14:14,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:14,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:14,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656752276] [2021-12-07 00:14:14,984 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:14,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189483292] [2021-12-07 00:14:14,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189483292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:14,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:14,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:14:14,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848651269] [2021-12-07 00:14:14,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:14,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:14:14,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:14,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:14:14,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:14:14,985 INFO L87 Difference]: Start difference. First operand 194 states and 243 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:14,996 INFO L93 Difference]: Finished difference Result 222 states and 276 transitions. [2021-12-07 00:14:14,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:14:14,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 182 [2021-12-07 00:14:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:14,998 INFO L225 Difference]: With dead ends: 222 [2021-12-07 00:14:14,998 INFO L226 Difference]: Without dead ends: 195 [2021-12-07 00:14:14,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:14:14,998 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:14,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 587 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-07 00:14:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-07 00:14:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 137 states have (on average 1.197080291970803) internal successors, (164), 139 states have internal predecessors, (164), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-07 00:14:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 244 transitions. [2021-12-07 00:14:15,006 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 244 transitions. Word has length 182 [2021-12-07 00:14:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:15,006 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 244 transitions. [2021-12-07 00:14:15,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 244 transitions. [2021-12-07 00:14:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-07 00:14:15,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:15,008 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:15,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-07 00:14:15,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 00:14:15,209 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash -101731212, now seen corresponding path program 2 times [2021-12-07 00:14:15,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:15,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852295947] [2021-12-07 00:14:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:15,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:15,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:15,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669703491] [2021-12-07 00:14:15,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:14:15,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:15,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:15,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:15,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:14:15,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:14:15,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:14:15,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:14:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:15,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2021-12-07 00:14:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-07 00:14:15,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:15,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:15,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852295947] [2021-12-07 00:14:15,893 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:15,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669703491] [2021-12-07 00:14:15,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669703491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:15,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:15,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:14:15,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153393816] [2021-12-07 00:14:15,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:15,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:14:15,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:15,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:14:15,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:14:15,895 INFO L87 Difference]: Start difference. First operand 195 states and 244 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:15,925 INFO L93 Difference]: Finished difference Result 330 states and 410 transitions. [2021-12-07 00:14:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:14:15,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-12-07 00:14:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:15,927 INFO L225 Difference]: With dead ends: 330 [2021-12-07 00:14:15,927 INFO L226 Difference]: Without dead ends: 211 [2021-12-07 00:14:15,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:14:15,928 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 9 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:15,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 788 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-07 00:14:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2021-12-07 00:14:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 149 states have internal predecessors, (176), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-07 00:14:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 256 transitions. [2021-12-07 00:14:15,941 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 256 transitions. Word has length 185 [2021-12-07 00:14:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:15,941 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 256 transitions. [2021-12-07 00:14:15,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 256 transitions. [2021-12-07 00:14:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-07 00:14:15,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:15,943 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:15,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:14:16,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:14:16,145 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:16,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash 747347188, now seen corresponding path program 1 times [2021-12-07 00:14:16,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:16,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316354437] [2021-12-07 00:14:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:16,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:16,241 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:16,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479261931] [2021-12-07 00:14:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:16,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:16,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:16,243 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:16,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:14:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:16,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:14:16,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-07 00:14:16,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:16,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:16,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316354437] [2021-12-07 00:14:16,636 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:16,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479261931] [2021-12-07 00:14:16,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479261931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:16,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:16,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:14:16,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447668177] [2021-12-07 00:14:16,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:16,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:14:16,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:14:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:14:16,638 INFO L87 Difference]: Start difference. First operand 205 states and 256 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:16,655 INFO L93 Difference]: Finished difference Result 332 states and 412 transitions. [2021-12-07 00:14:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:14:16,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-12-07 00:14:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:16,657 INFO L225 Difference]: With dead ends: 332 [2021-12-07 00:14:16,657 INFO L226 Difference]: Without dead ends: 201 [2021-12-07 00:14:16,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:14:16,658 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 2 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:16,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 582 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-07 00:14:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2021-12-07 00:14:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 141 states have internal predecessors, (164), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-07 00:14:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 244 transitions. [2021-12-07 00:14:16,667 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 244 transitions. Word has length 185 [2021-12-07 00:14:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:16,667 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 244 transitions. [2021-12-07 00:14:16,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 244 transitions. [2021-12-07 00:14:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-07 00:14:16,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:16,669 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:16,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:14:16,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:14:16,870 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash 382427316, now seen corresponding path program 1 times [2021-12-07 00:14:16,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:16,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186933301] [2021-12-07 00:14:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:16,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:16,942 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:16,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391026407] [2021-12-07 00:14:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:16,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:16,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:16,943 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:16,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:14:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 2671 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:14:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-07 00:14:17,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:14:17,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:17,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186933301] [2021-12-07 00:14:17,328 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:17,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391026407] [2021-12-07 00:14:17,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391026407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:14:17,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:14:17,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:14:17,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812085046] [2021-12-07 00:14:17,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:14:17,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:14:17,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:17,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:14:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:14:17,329 INFO L87 Difference]: Start difference. First operand 197 states and 244 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:17,349 INFO L93 Difference]: Finished difference Result 347 states and 435 transitions. [2021-12-07 00:14:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:14:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-12-07 00:14:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:17,352 INFO L225 Difference]: With dead ends: 347 [2021-12-07 00:14:17,352 INFO L226 Difference]: Without dead ends: 197 [2021-12-07 00:14:17,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:14:17,353 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:17,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 586 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:14:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-07 00:14:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-12-07 00:14:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 141 states have internal predecessors, (163), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-12-07 00:14:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-12-07 00:14:17,365 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 185 [2021-12-07 00:14:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:17,366 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-12-07 00:14:17,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-07 00:14:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-12-07 00:14:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-07 00:14:17,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:17,368 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:17,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:14:17,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:17,568 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:17,569 INFO L85 PathProgramCache]: Analyzing trace with hash -908019048, now seen corresponding path program 1 times [2021-12-07 00:14:17,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:17,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364153221] [2021-12-07 00:14:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:17,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:17,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:17,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713707342] [2021-12-07 00:14:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:17,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:17,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:17,606 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:17,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:14:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:17,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-07 00:14:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:17,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:14:18,308 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 00:14:18,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:14:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:14:20,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:14:22,970 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1772 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1772))) is different from true [2021-12-07 00:14:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 52 proven. 20 refuted. 2 times theorem prover too weak. 42 trivial. 3 not checked. [2021-12-07 00:14:24,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:24,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:24,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364153221] [2021-12-07 00:14:24,610 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:24,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713707342] [2021-12-07 00:14:24,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713707342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:24,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:14:24,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-07 00:14:24,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128584592] [2021-12-07 00:14:24,610 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:24,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 00:14:24,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:24,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 00:14:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=858, Unknown=36, NotChecked=60, Total=1056 [2021-12-07 00:14:24,611 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-07 00:14:25,056 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v___CPROVER_overflow_mult_~#c~1.base_84| Int) (v_ArrVal_1769 Int)) (and (= (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_84|) 0) (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_84| v_ArrVal_1769)))) (exists ((v_ArrVal_1770 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1770))) (exists ((v_ArrVal_1772 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1772)))) is different from true [2021-12-07 00:14:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:25,553 INFO L93 Difference]: Finished difference Result 395 states and 495 transitions. [2021-12-07 00:14:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-07 00:14:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 187 [2021-12-07 00:14:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:25,555 INFO L225 Difference]: With dead ends: 395 [2021-12-07 00:14:25,555 INFO L226 Difference]: Without dead ends: 278 [2021-12-07 00:14:25,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=151, Invalid=1369, Unknown=48, NotChecked=154, Total=1722 [2021-12-07 00:14:25,557 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 94 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2106 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:25,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1781 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 981 Invalid, 0 Unknown, 2106 Unchecked, 0.6s Time] [2021-12-07 00:14:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-07 00:14:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 251. [2021-12-07 00:14:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 181 states have (on average 1.1657458563535912) internal successors, (211), 186 states have internal predecessors, (211), 40 states have call successors, (40), 22 states have call predecessors, (40), 29 states have return successors, (61), 43 states have call predecessors, (61), 39 states have call successors, (61) [2021-12-07 00:14:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 312 transitions. [2021-12-07 00:14:25,568 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 312 transitions. Word has length 187 [2021-12-07 00:14:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:25,569 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 312 transitions. [2021-12-07 00:14:25,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 27 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-12-07 00:14:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 312 transitions. [2021-12-07 00:14:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-07 00:14:25,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:25,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:25,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:14:25,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:14:25,771 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1925449391, now seen corresponding path program 1 times [2021-12-07 00:14:25,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:25,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510407024] [2021-12-07 00:14:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:25,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:25,813 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:25,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310753989] [2021-12-07 00:14:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:25,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:25,814 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:25,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:14:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-07 00:14:26,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:26,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:14:26,539 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 00:14:26,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:14:28,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:14:28,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:14:30,730 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1924 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1924))) is different from true [2021-12-07 00:14:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 51 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 3 not checked. [2021-12-07 00:14:31,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:31,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:31,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510407024] [2021-12-07 00:14:31,542 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:31,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310753989] [2021-12-07 00:14:31,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310753989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:31,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:14:31,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-07 00:14:31,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124016987] [2021-12-07 00:14:31,542 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:31,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:14:31,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:14:31,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=432, Unknown=5, NotChecked=42, Total=552 [2021-12-07 00:14:31,543 INFO L87 Difference]: Start difference. First operand 251 states and 312 transitions. Second operand has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-12-07 00:14:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:33,071 INFO L93 Difference]: Finished difference Result 481 states and 607 transitions. [2021-12-07 00:14:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:14:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 193 [2021-12-07 00:14:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:33,074 INFO L225 Difference]: With dead ends: 481 [2021-12-07 00:14:33,074 INFO L226 Difference]: Without dead ends: 347 [2021-12-07 00:14:33,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 235 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=121, Invalid=797, Unknown=16, NotChecked=58, Total=992 [2021-12-07 00:14:33,075 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 138 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:33,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1263 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1047 Invalid, 0 Unknown, 858 Unchecked, 0.7s Time] [2021-12-07 00:14:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-07 00:14:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 275. [2021-12-07 00:14:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 201 states have (on average 1.1741293532338308) internal successors, (236), 207 states have internal predecessors, (236), 41 states have call successors, (41), 23 states have call predecessors, (41), 32 states have return successors, (65), 45 states have call predecessors, (65), 40 states have call successors, (65) [2021-12-07 00:14:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 342 transitions. [2021-12-07 00:14:33,095 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 342 transitions. Word has length 193 [2021-12-07 00:14:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:33,095 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 342 transitions. [2021-12-07 00:14:33,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-12-07 00:14:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 342 transitions. [2021-12-07 00:14:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-07 00:14:33,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:33,098 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:33,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 00:14:33,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:33,299 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:33,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1752761233, now seen corresponding path program 1 times [2021-12-07 00:14:33,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:33,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701576117] [2021-12-07 00:14:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:33,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:33,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:33,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184589194] [2021-12-07 00:14:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:33,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:33,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:33,353 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:33,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:14:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-07 00:14:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:33,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:14:34,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:14:34,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 00:14:34,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:14:34,156 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 00:14:34,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:14:34,233 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 00:14:34,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 00:14:36,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:14:36,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:14:38,426 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2082 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2082))) is different from true [2021-12-07 00:14:40,657 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_2083 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_2083)))) is different from true [2021-12-07 00:14:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 42 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 3 not checked. [2021-12-07 00:14:49,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:49,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701576117] [2021-12-07 00:14:49,929 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:14:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184589194] [2021-12-07 00:14:49,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184589194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:49,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:14:49,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-07 00:14:49,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246791799] [2021-12-07 00:14:49,930 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:49,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 00:14:49,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:49,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 00:14:49,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=826, Unknown=13, NotChecked=118, Total=1056 [2021-12-07 00:14:49,931 INFO L87 Difference]: Start difference. First operand 275 states and 342 transitions. Second operand has 32 states, 29 states have (on average 4.137931034482759) internal successors, (120), 28 states have internal predecessors, (120), 14 states have call successors, (27), 8 states have call predecessors, (27), 12 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-12-07 00:14:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:14:58,567 INFO L93 Difference]: Finished difference Result 487 states and 609 transitions. [2021-12-07 00:14:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 00:14:58,567 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.137931034482759) internal successors, (120), 28 states have internal predecessors, (120), 14 states have call successors, (27), 8 states have call predecessors, (27), 12 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) Word has length 193 [2021-12-07 00:14:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:14:58,569 INFO L225 Difference]: With dead ends: 487 [2021-12-07 00:14:58,569 INFO L226 Difference]: Without dead ends: 355 [2021-12-07 00:14:58,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 229 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=157, Invalid=1462, Unknown=29, NotChecked=158, Total=1806 [2021-12-07 00:14:58,570 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 142 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2025 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:14:58,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1803 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1238 Invalid, 0 Unknown, 2025 Unchecked, 0.7s Time] [2021-12-07 00:14:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-07 00:14:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 312. [2021-12-07 00:14:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 229 states have (on average 1.1746724890829694) internal successors, (269), 236 states have internal predecessors, (269), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (74), 50 states have call predecessors, (74), 44 states have call successors, (74) [2021-12-07 00:14:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 388 transitions. [2021-12-07 00:14:58,585 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 388 transitions. Word has length 193 [2021-12-07 00:14:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:14:58,585 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 388 transitions. [2021-12-07 00:14:58,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.137931034482759) internal successors, (120), 28 states have internal predecessors, (120), 14 states have call successors, (27), 8 states have call predecessors, (27), 12 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-12-07 00:14:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 388 transitions. [2021-12-07 00:14:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-07 00:14:58,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:14:58,587 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:58,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 00:14:58,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:58,788 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:14:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash -16710381, now seen corresponding path program 1 times [2021-12-07 00:14:58,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:58,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107138896] [2021-12-07 00:14:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:58,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:58,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:14:58,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428455911] [2021-12-07 00:14:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:58,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:58,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:58,828 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:58,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:14:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:59,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-07 00:14:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:59,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:14:59,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 55 [2021-12-07 00:14:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 57 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-07 00:14:59,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-07 00:15:00,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107138896] [2021-12-07 00:15:00,284 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428455911] [2021-12-07 00:15:00,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428455911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:00,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:00,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2021-12-07 00:15:00,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001878178] [2021-12-07 00:15:00,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:00,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 00:15:00,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 00:15:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:15:00,286 INFO L87 Difference]: Start difference. First operand 312 states and 388 transitions. Second operand has 19 states, 18 states have (on average 8.777777777777779) internal successors, (158), 17 states have internal predecessors, (158), 4 states have call successors, (33), 2 states have call predecessors, (33), 7 states have return successors, (35), 5 states have call predecessors, (35), 4 states have call successors, (35) [2021-12-07 00:15:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:00,558 INFO L93 Difference]: Finished difference Result 471 states and 605 transitions. [2021-12-07 00:15:00,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 00:15:00,558 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 8.777777777777779) internal successors, (158), 17 states have internal predecessors, (158), 4 states have call successors, (33), 2 states have call predecessors, (33), 7 states have return successors, (35), 5 states have call predecessors, (35), 4 states have call successors, (35) Word has length 193 [2021-12-07 00:15:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:00,560 INFO L225 Difference]: With dead ends: 471 [2021-12-07 00:15:00,560 INFO L226 Difference]: Without dead ends: 328 [2021-12-07 00:15:00,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:15:00,561 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 87 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:00,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1974 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:15:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-07 00:15:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 321. [2021-12-07 00:15:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 238 states have (on average 1.180672268907563) internal successors, (281), 245 states have internal predecessors, (281), 45 states have call successors, (45), 26 states have call predecessors, (45), 37 states have return successors, (74), 50 states have call predecessors, (74), 44 states have call successors, (74) [2021-12-07 00:15:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 400 transitions. [2021-12-07 00:15:00,576 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 400 transitions. Word has length 193 [2021-12-07 00:15:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:00,576 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 400 transitions. [2021-12-07 00:15:00,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 8.777777777777779) internal successors, (158), 17 states have internal predecessors, (158), 4 states have call successors, (33), 2 states have call predecessors, (33), 7 states have return successors, (35), 5 states have call predecessors, (35), 4 states have call successors, (35) [2021-12-07 00:15:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 400 transitions. [2021-12-07 00:15:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-07 00:15:00,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:00,578 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:00,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 00:15:00,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-07 00:15:00,780 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:00,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:00,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1529453249, now seen corresponding path program 1 times [2021-12-07 00:15:00,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:00,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501209488] [2021-12-07 00:15:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:00,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:00,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:00,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351013437] [2021-12-07 00:15:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:00,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:00,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:00,861 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:00,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 00:15:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:01,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2768 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:15:01,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-07 00:15:01,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:15:01,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501209488] [2021-12-07 00:15:01,321 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351013437] [2021-12-07 00:15:01,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351013437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:15:01,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:15:01,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-07 00:15:01,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5727432] [2021-12-07 00:15:01,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:15:01,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:15:01,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:15:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:15:01,323 INFO L87 Difference]: Start difference. First operand 321 states and 400 transitions. Second operand has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2021-12-07 00:15:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:01,484 INFO L93 Difference]: Finished difference Result 471 states and 585 transitions. [2021-12-07 00:15:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:15:01,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) Word has length 205 [2021-12-07 00:15:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:01,487 INFO L225 Difference]: With dead ends: 471 [2021-12-07 00:15:01,487 INFO L226 Difference]: Without dead ends: 319 [2021-12-07 00:15:01,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:15:01,489 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 233 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:01,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1091 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:15:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-07 00:15:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-12-07 00:15:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 237 states have (on average 1.1772151898734178) internal successors, (279), 243 states have internal predecessors, (279), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-07 00:15:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 397 transitions. [2021-12-07 00:15:01,508 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 397 transitions. Word has length 205 [2021-12-07 00:15:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:01,509 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 397 transitions. [2021-12-07 00:15:01,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2021-12-07 00:15:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 397 transitions. [2021-12-07 00:15:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-07 00:15:01,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:01,511 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:01,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 00:15:01,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-07 00:15:01,711 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash -767778095, now seen corresponding path program 1 times [2021-12-07 00:15:01,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:01,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164557662] [2021-12-07 00:15:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:01,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:01,759 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:01,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698121873] [2021-12-07 00:15:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:01,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:01,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:01,760 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:01,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 00:15:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:02,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 2909 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:15:02,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-07 00:15:02,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-07 00:15:02,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164557662] [2021-12-07 00:15:02,601 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698121873] [2021-12-07 00:15:02,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698121873] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:02,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:02,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-07 00:15:02,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800138761] [2021-12-07 00:15:02,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:02,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:15:02,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:15:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:15:02,603 INFO L87 Difference]: Start difference. First operand 319 states and 397 transitions. Second operand has 13 states, 11 states have (on average 10.545454545454545) internal successors, (116), 13 states have internal predecessors, (116), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-12-07 00:15:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:02,692 INFO L93 Difference]: Finished difference Result 464 states and 573 transitions. [2021-12-07 00:15:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:15:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.545454545454545) internal successors, (116), 13 states have internal predecessors, (116), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 220 [2021-12-07 00:15:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:02,694 INFO L225 Difference]: With dead ends: 464 [2021-12-07 00:15:02,694 INFO L226 Difference]: Without dead ends: 322 [2021-12-07 00:15:02,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:15:02,695 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 29 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:02,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1316 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:15:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-07 00:15:02,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2021-12-07 00:15:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 239 states have (on average 1.1757322175732217) internal successors, (281), 245 states have internal predecessors, (281), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-07 00:15:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 399 transitions. [2021-12-07 00:15:02,709 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 399 transitions. Word has length 220 [2021-12-07 00:15:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:02,709 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 399 transitions. [2021-12-07 00:15:02,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.545454545454545) internal successors, (116), 13 states have internal predecessors, (116), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-12-07 00:15:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 399 transitions. [2021-12-07 00:15:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-07 00:15:02,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:02,711 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:02,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 00:15:02,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 00:15:02,913 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:02,914 INFO L85 PathProgramCache]: Analyzing trace with hash -988406634, now seen corresponding path program 1 times [2021-12-07 00:15:02,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:02,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190223588] [2021-12-07 00:15:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:02,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:02,999 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:02,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314255885] [2021-12-07 00:15:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:02,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:02,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:03,000 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:03,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 00:15:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:03,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2932 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 00:15:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-07 00:15:03,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-07 00:15:03,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:03,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190223588] [2021-12-07 00:15:03,891 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:03,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314255885] [2021-12-07 00:15:03,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314255885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:03,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:03,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-12-07 00:15:03,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021816547] [2021-12-07 00:15:03,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:03,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 00:15:03,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:03,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 00:15:03,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:15:03,893 INFO L87 Difference]: Start difference. First operand 321 states and 399 transitions. Second operand has 16 states, 13 states have (on average 9.692307692307692) internal successors, (126), 16 states have internal predecessors, (126), 7 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 7 states have call successors, (32) [2021-12-07 00:15:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:03,998 INFO L93 Difference]: Finished difference Result 468 states and 577 transitions. [2021-12-07 00:15:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:15:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 9.692307692307692) internal successors, (126), 16 states have internal predecessors, (126), 7 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 7 states have call successors, (32) Word has length 228 [2021-12-07 00:15:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:04,000 INFO L225 Difference]: With dead ends: 468 [2021-12-07 00:15:04,000 INFO L226 Difference]: Without dead ends: 324 [2021-12-07 00:15:04,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:15:04,001 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 55 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:04,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1300 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:15:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-07 00:15:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-12-07 00:15:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 241 states have (on average 1.1742738589211619) internal successors, (283), 247 states have internal predecessors, (283), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-07 00:15:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 401 transitions. [2021-12-07 00:15:04,021 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 401 transitions. Word has length 228 [2021-12-07 00:15:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:04,021 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 401 transitions. [2021-12-07 00:15:04,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 9.692307692307692) internal successors, (126), 16 states have internal predecessors, (126), 7 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 7 states have call successors, (32) [2021-12-07 00:15:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 401 transitions. [2021-12-07 00:15:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-07 00:15:04,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:04,023 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:04,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 00:15:04,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 00:15:04,224 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash 783622132, now seen corresponding path program 2 times [2021-12-07 00:15:04,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:04,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126288324] [2021-12-07 00:15:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:04,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:04,264 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:04,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736169507] [2021-12-07 00:15:04,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:15:04,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:04,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:04,265 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:04,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 00:15:04,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:15:04,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:15:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2951 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 00:15:04,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-07 00:15:04,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-07 00:15:05,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:05,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126288324] [2021-12-07 00:15:05,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:05,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736169507] [2021-12-07 00:15:05,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736169507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:05,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:05,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-07 00:15:05,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359759187] [2021-12-07 00:15:05,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:05,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:15:05,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:05,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:15:05,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:15:05,353 INFO L87 Difference]: Start difference. First operand 323 states and 401 transitions. Second operand has 17 states, 15 states have (on average 8.6) internal successors, (129), 17 states have internal predecessors, (129), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2021-12-07 00:15:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:05,497 INFO L93 Difference]: Finished difference Result 472 states and 581 transitions. [2021-12-07 00:15:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:15:05,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 8.6) internal successors, (129), 17 states have internal predecessors, (129), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) Word has length 230 [2021-12-07 00:15:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:05,499 INFO L225 Difference]: With dead ends: 472 [2021-12-07 00:15:05,499 INFO L226 Difference]: Without dead ends: 326 [2021-12-07 00:15:05,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:15:05,500 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 37 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:05,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2069 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:15:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-07 00:15:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2021-12-07 00:15:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 243 states have (on average 1.1728395061728396) internal successors, (285), 249 states have internal predecessors, (285), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-07 00:15:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 403 transitions. [2021-12-07 00:15:05,514 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 403 transitions. Word has length 230 [2021-12-07 00:15:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:05,514 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 403 transitions. [2021-12-07 00:15:05,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 8.6) internal successors, (129), 17 states have internal predecessors, (129), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2021-12-07 00:15:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 403 transitions. [2021-12-07 00:15:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-07 00:15:05,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:05,516 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:05,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 00:15:05,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:05,717 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:05,719 INFO L85 PathProgramCache]: Analyzing trace with hash 720148011, now seen corresponding path program 2 times [2021-12-07 00:15:05,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:05,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480900443] [2021-12-07 00:15:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:05,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:05,823 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112415285] [2021-12-07 00:15:05,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:15:05,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:05,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:05,824 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:05,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 00:15:07,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:15:07,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:15:08,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 2966 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:15:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-07 00:15:08,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-07 00:15:08,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:08,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480900443] [2021-12-07 00:15:08,629 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:08,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112415285] [2021-12-07 00:15:08,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112415285] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:08,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:08,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-07 00:15:08,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060622704] [2021-12-07 00:15:08,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:08,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 00:15:08,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 00:15:08,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:15:08,630 INFO L87 Difference]: Start difference. First operand 325 states and 403 transitions. Second operand has 19 states, 17 states have (on average 7.529411764705882) internal successors, (128), 19 states have internal predecessors, (128), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-12-07 00:15:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:08,781 INFO L93 Difference]: Finished difference Result 476 states and 585 transitions. [2021-12-07 00:15:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:15:08,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 7.529411764705882) internal successors, (128), 19 states have internal predecessors, (128), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 226 [2021-12-07 00:15:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:08,783 INFO L225 Difference]: With dead ends: 476 [2021-12-07 00:15:08,783 INFO L226 Difference]: Without dead ends: 328 [2021-12-07 00:15:08,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:15:08,784 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 50 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:08,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1703 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:15:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-07 00:15:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2021-12-07 00:15:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 245 states have (on average 1.1714285714285715) internal successors, (287), 251 states have internal predecessors, (287), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-07 00:15:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 405 transitions. [2021-12-07 00:15:08,797 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 405 transitions. Word has length 226 [2021-12-07 00:15:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:08,797 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 405 transitions. [2021-12-07 00:15:08,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 7.529411764705882) internal successors, (128), 19 states have internal predecessors, (128), 6 states have call successors, (30), 2 states have call predecessors, (30), 5 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-12-07 00:15:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 405 transitions. [2021-12-07 00:15:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-07 00:15:08,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:08,799 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:08,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-07 00:15:09,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 00:15:09,000 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2027128905, now seen corresponding path program 3 times [2021-12-07 00:15:09,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:09,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554382345] [2021-12-07 00:15:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:09,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:09,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442338537] [2021-12-07 00:15:09,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:15:09,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:09,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:09,041 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:09,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 00:15:46,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-07 00:15:46,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:15:46,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 00:15:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-07 00:15:46,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-07 00:15:46,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554382345] [2021-12-07 00:15:46,961 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:46,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442338537] [2021-12-07 00:15:46,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442338537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:46,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:46,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2021-12-07 00:15:46,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143215428] [2021-12-07 00:15:46,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:46,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:15:46,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:46,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:15:46,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:15:46,962 INFO L87 Difference]: Start difference. First operand 327 states and 405 transitions. Second operand has 23 states, 22 states have (on average 6.818181818181818) internal successors, (150), 23 states have internal predecessors, (150), 4 states have call successors, (29), 2 states have call predecessors, (29), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-07 00:15:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:47,996 INFO L93 Difference]: Finished difference Result 522 states and 690 transitions. [2021-12-07 00:15:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 00:15:47,997 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 6.818181818181818) internal successors, (150), 23 states have internal predecessors, (150), 4 states have call successors, (29), 2 states have call predecessors, (29), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 228 [2021-12-07 00:15:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:47,999 INFO L225 Difference]: With dead ends: 522 [2021-12-07 00:15:47,999 INFO L226 Difference]: Without dead ends: 364 [2021-12-07 00:15:48,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 00:15:48,000 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 126 mSDsluCounter, 2441 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2634 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:48,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 2634 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:15:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-07 00:15:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 345. [2021-12-07 00:15:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 263 states have (on average 1.182509505703422) internal successors, (311), 269 states have internal predecessors, (311), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-07 00:15:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 429 transitions. [2021-12-07 00:15:48,016 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 429 transitions. Word has length 228 [2021-12-07 00:15:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:48,016 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 429 transitions. [2021-12-07 00:15:48,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 6.818181818181818) internal successors, (150), 23 states have internal predecessors, (150), 4 states have call successors, (29), 2 states have call predecessors, (29), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-07 00:15:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 429 transitions. [2021-12-07 00:15:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-12-07 00:15:48,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:48,018 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 10, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:48,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 00:15:48,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 00:15:48,220 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1305160473, now seen corresponding path program 1 times [2021-12-07 00:15:48,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:48,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352132718] [2021-12-07 00:15:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:48,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:48,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:48,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081862052] [2021-12-07 00:15:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:48,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:48,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:48,327 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:48,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 00:15:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:48,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 00:15:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 163 proven. 25 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-12-07 00:15:48,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-07 00:15:49,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352132718] [2021-12-07 00:15:49,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081862052] [2021-12-07 00:15:49,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081862052] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:49,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:49,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-07 00:15:49,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794169569] [2021-12-07 00:15:49,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:49,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:15:49,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:15:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:15:49,637 INFO L87 Difference]: Start difference. First operand 345 states and 429 transitions. Second operand has 21 states, 19 states have (on average 8.947368421052632) internal successors, (170), 21 states have internal predecessors, (170), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2021-12-07 00:15:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:49,828 INFO L93 Difference]: Finished difference Result 516 states and 637 transitions. [2021-12-07 00:15:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:15:49,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 8.947368421052632) internal successors, (170), 21 states have internal predecessors, (170), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 301 [2021-12-07 00:15:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:49,830 INFO L225 Difference]: With dead ends: 516 [2021-12-07 00:15:49,830 INFO L226 Difference]: Without dead ends: 348 [2021-12-07 00:15:49,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:15:49,831 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 59 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:49,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1893 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:15:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-07 00:15:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2021-12-07 00:15:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 265 states have (on average 1.181132075471698) internal successors, (313), 271 states have internal predecessors, (313), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-07 00:15:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 431 transitions. [2021-12-07 00:15:49,844 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 431 transitions. Word has length 301 [2021-12-07 00:15:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:49,845 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 431 transitions. [2021-12-07 00:15:49,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 8.947368421052632) internal successors, (170), 21 states have internal predecessors, (170), 6 states have call successors, (40), 2 states have call predecessors, (40), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2021-12-07 00:15:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 431 transitions. [2021-12-07 00:15:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-07 00:15:49,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:49,847 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:49,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 00:15:50,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 00:15:50,048 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash -949690780, now seen corresponding path program 1 times [2021-12-07 00:15:50,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:50,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435600648] [2021-12-07 00:15:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:50,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:50,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:50,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071835277] [2021-12-07 00:15:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:50,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:50,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:50,127 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:50,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 00:15:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:50,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 3324 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-07 00:15:50,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-12-07 00:15:50,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-12-07 00:15:51,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:51,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435600648] [2021-12-07 00:15:51,377 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:51,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071835277] [2021-12-07 00:15:51,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071835277] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:51,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:51,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-12-07 00:15:51,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871133216] [2021-12-07 00:15:51,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:51,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:15:51,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:15:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:15:51,379 INFO L87 Difference]: Start difference. First operand 347 states and 431 transitions. Second operand has 23 states, 21 states have (on average 8.047619047619047) internal successors, (169), 23 states have internal predecessors, (169), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-07 00:15:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:51,638 INFO L93 Difference]: Finished difference Result 520 states and 641 transitions. [2021-12-07 00:15:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:15:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 8.047619047619047) internal successors, (169), 23 states have internal predecessors, (169), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 299 [2021-12-07 00:15:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:51,640 INFO L225 Difference]: With dead ends: 520 [2021-12-07 00:15:51,640 INFO L226 Difference]: Without dead ends: 350 [2021-12-07 00:15:51,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-12-07 00:15:51,641 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 37 mSDsluCounter, 2451 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:51,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2642 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:15:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-07 00:15:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2021-12-07 00:15:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 267 states have (on average 1.1797752808988764) internal successors, (315), 273 states have internal predecessors, (315), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-07 00:15:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 433 transitions. [2021-12-07 00:15:51,655 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 433 transitions. Word has length 299 [2021-12-07 00:15:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:51,655 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 433 transitions. [2021-12-07 00:15:51,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 8.047619047619047) internal successors, (169), 23 states have internal predecessors, (169), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-07 00:15:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 433 transitions. [2021-12-07 00:15:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-07 00:15:51,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:51,657 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:51,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-07 00:15:51,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 00:15:51,859 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:51,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1955674728, now seen corresponding path program 2 times [2021-12-07 00:15:51,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:51,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790072119] [2021-12-07 00:15:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:51,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:51,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322045474] [2021-12-07 00:15:51,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:15:51,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:51,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:51,929 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:51,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 00:15:52,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:15:52,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:15:52,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 3362 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-07 00:15:52,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 215 proven. 49 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-07 00:15:52,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-12-07 00:15:53,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790072119] [2021-12-07 00:15:53,424 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322045474] [2021-12-07 00:15:53,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322045474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:53,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:53,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-12-07 00:15:53,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063093172] [2021-12-07 00:15:53,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:53,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 00:15:53,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 00:15:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-12-07 00:15:53,427 INFO L87 Difference]: Start difference. First operand 349 states and 433 transitions. Second operand has 25 states, 23 states have (on average 7.521739130434782) internal successors, (173), 25 states have internal predecessors, (173), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-07 00:15:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:53,706 INFO L93 Difference]: Finished difference Result 524 states and 645 transitions. [2021-12-07 00:15:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:15:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 7.521739130434782) internal successors, (173), 25 states have internal predecessors, (173), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 303 [2021-12-07 00:15:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:53,708 INFO L225 Difference]: With dead ends: 524 [2021-12-07 00:15:53,708 INFO L226 Difference]: Without dead ends: 352 [2021-12-07 00:15:53,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-12-07 00:15:53,710 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 53 mSDsluCounter, 2830 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:53,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 3021 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:15:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-07 00:15:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 351. [2021-12-07 00:15:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 269 states have (on average 1.178438661710037) internal successors, (317), 275 states have internal predecessors, (317), 45 states have call successors, (45), 26 states have call predecessors, (45), 36 states have return successors, (73), 50 states have call predecessors, (73), 44 states have call successors, (73) [2021-12-07 00:15:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 435 transitions. [2021-12-07 00:15:53,723 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 435 transitions. Word has length 303 [2021-12-07 00:15:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:53,723 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 435 transitions. [2021-12-07 00:15:53,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 7.521739130434782) internal successors, (173), 25 states have internal predecessors, (173), 6 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-07 00:15:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 435 transitions. [2021-12-07 00:15:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-12-07 00:15:53,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:53,725 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 13, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:53,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-07 00:15:53,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:53,926 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:53,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1011762284, now seen corresponding path program 3 times [2021-12-07 00:15:53,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:53,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857986844] [2021-12-07 00:15:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:53,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:54,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:54,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313505098] [2021-12-07 00:15:54,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:15:54,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:54,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:54,005 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:54,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 00:15:54,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 00:15:54,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:15:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 2311 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-07 00:15:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 77 proven. 40 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-12-07 00:15:54,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:55,445 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-12-07 00:15:55,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 68 [2021-12-07 00:15:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-12-07 00:15:55,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:55,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857986844] [2021-12-07 00:15:55,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:15:55,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313505098] [2021-12-07 00:15:55,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313505098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:55,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:15:55,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-12-07 00:15:55,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501304681] [2021-12-07 00:15:55,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:55,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 00:15:55,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 00:15:55,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:15:55,728 INFO L87 Difference]: Start difference. First operand 351 states and 435 transitions. Second operand has 19 states, 16 states have (on average 8.4375) internal successors, (135), 17 states have internal predecessors, (135), 9 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (35), 6 states have call predecessors, (35), 9 states have call successors, (35) [2021-12-07 00:15:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:15:56,916 INFO L93 Difference]: Finished difference Result 480 states and 624 transitions. [2021-12-07 00:15:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:15:56,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 8.4375) internal successors, (135), 17 states have internal predecessors, (135), 9 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (35), 6 states have call predecessors, (35), 9 states have call successors, (35) Word has length 307 [2021-12-07 00:15:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:15:56,919 INFO L225 Difference]: With dead ends: 480 [2021-12-07 00:15:56,919 INFO L226 Difference]: Without dead ends: 426 [2021-12-07 00:15:56,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 595 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:15:56,920 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 257 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:15:56,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1551 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-07 00:15:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-12-07 00:15:56,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 370. [2021-12-07 00:15:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 281 states have (on average 1.1779359430604983) internal successors, (331), 288 states have internal predecessors, (331), 50 states have call successors, (50), 26 states have call predecessors, (50), 38 states have return successors, (88), 56 states have call predecessors, (88), 49 states have call successors, (88) [2021-12-07 00:15:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 469 transitions. [2021-12-07 00:15:56,935 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 469 transitions. Word has length 307 [2021-12-07 00:15:56,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:15:56,936 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 469 transitions. [2021-12-07 00:15:56,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 8.4375) internal successors, (135), 17 states have internal predecessors, (135), 9 states have call successors, (37), 4 states have call predecessors, (37), 5 states have return successors, (35), 6 states have call predecessors, (35), 9 states have call successors, (35) [2021-12-07 00:15:56,936 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 469 transitions. [2021-12-07 00:15:56,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-07 00:15:56,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:15:56,938 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:56,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-07 00:15:57,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-07 00:15:57,140 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:15:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1517392424, now seen corresponding path program 1 times [2021-12-07 00:15:57,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:57,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280563551] [2021-12-07 00:15:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:57,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:57,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:15:57,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056228976] [2021-12-07 00:15:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:57,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:57,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:57,188 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:57,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-07 00:15:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 3508 conjuncts, 483 conjunts are in the unsatisfiable core [2021-12-07 00:15:58,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:15:59,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 00:15:59,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 00:15:59,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 00:15:59,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:15:59,355 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 00:15:59,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 00:15:59,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:15:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:15:59,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-07 00:16:01,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:16:01,477 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 [2021-12-07 00:16:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:16:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:16:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:16:01,484 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 30 treesize of output 32 [2021-12-07 00:16:01,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 00:16:01,634 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 [2021-12-07 00:16:01,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:16:01,853 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5203 Int) (|v___CPROVER_overflow_mult_~#c~1.base_541| Int)) (and (= (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_541| v_ArrVal_5203) |c_#valid|) (= (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_541|) 0))) (exists ((v_ArrVal_5205 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5205) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_5204 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5204)))) is different from true [2021-12-07 00:16:37,441 INFO L354 Elim1Store]: treesize reduction 198, result has 25.3 percent of original size [2021-12-07 00:16:37,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 3602 treesize of output 3610 [2021-12-07 00:16:37,603 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-07 00:16:37,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 68 [2021-12-07 00:16:37,675 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-07 00:16:37,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 75 [2021-12-07 00:16:37,726 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 8 treesize of output 7 [2021-12-07 00:16:37,774 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 8 treesize of output 7 [2021-12-07 00:16:38,427 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 12 treesize of output 11 [2021-12-07 00:16:38,467 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 12 treesize of output 11 [2021-12-07 00:16:39,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-12-07 00:16:39,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 28 treesize of output 22 [2021-12-07 00:16:39,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-12-07 00:16:39,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 37 treesize of output 29 [2021-12-07 00:16:39,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 00:16:48,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 00:16:48,221 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 10 treesize of output 6 [2021-12-07 00:16:48,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:16:48,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 00:16:51,397 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5218 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5218))) (exists ((v_ArrVal_5216 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5216))) (exists ((v_ArrVal_5203 Int) (|v___CPROVER_overflow_mult_~#c~1.base_541| Int)) (and (= (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_541| v_ArrVal_5203) |c_#valid|) (= (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_541|) 0))) (exists ((v_ArrVal_5217 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5217)))) is different from true [2021-12-07 00:16:52,069 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:16:52,069 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 3 case distinctions, treesize of input 36 treesize of output 37 [2021-12-07 00:16:52,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:16:52,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:16:52,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:16:52,220 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 00:16:52,220 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 3 case distinctions, treesize of input 36 treesize of output 37 [2021-12-07 00:17:11,743 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:17:20,211 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:17:28,862 WARN L227 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:17:37,863 WARN L227 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:17:47,142 WARN L227 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:17:54,658 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:17:56,729 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5250 Int) (v_ArrVal_5260 Int) (v_ArrVal_5226 Int) (v_ArrVal_5234 Int) (v_ArrVal_5244 Int) (v_ArrVal_5220 Int) (v_ArrVal_5242 Int) (v_ArrVal_5263 Int)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_memset_impl_#in~s.base| (store (store (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_memset_impl_#in~s.base|) |c_memset_impl_#in~s.offset| v_ArrVal_5220) (+ |c_memset_impl_#in~s.offset| 1) v_ArrVal_5226) (+ 2 |c_memset_impl_#in~s.offset|) v_ArrVal_5234) (+ 3 |c_memset_impl_#in~s.offset|) v_ArrVal_5242) (+ |c_memset_impl_#in~s.offset| 4) v_ArrVal_5244) (+ 5 |c_memset_impl_#in~s.offset|) v_ArrVal_5250) (+ 6 |c_memset_impl_#in~s.offset|) v_ArrVal_5260) (+ 7 |c_memset_impl_#in~s.offset|) v_ArrVal_5263)))) (exists ((v_ArrVal_5240 Int) (v_ArrVal_5237 Int) (v_ArrVal_5246 Int) (v_ArrVal_5223 Int) (v_ArrVal_5256 Int) (v_ArrVal_5254 Int) (v_ArrVal_5265 Int) (v_ArrVal_5230 Int)) (= (store |c_old(#memory_$Pointer$.base)| |c_memset_impl_#in~s.base| (store (store (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_memset_impl_#in~s.base|) |c_memset_impl_#in~s.offset| v_ArrVal_5223) (+ |c_memset_impl_#in~s.offset| 1) v_ArrVal_5230) (+ 2 |c_memset_impl_#in~s.offset|) v_ArrVal_5237) (+ 3 |c_memset_impl_#in~s.offset|) v_ArrVal_5240) (+ |c_memset_impl_#in~s.offset| 4) v_ArrVal_5246) (+ 5 |c_memset_impl_#in~s.offset|) v_ArrVal_5254) (+ 6 |c_memset_impl_#in~s.offset|) v_ArrVal_5256) (+ 7 |c_memset_impl_#in~s.offset|) v_ArrVal_5265)) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_5251 Int) (v_ArrVal_5261 Int) (v_ArrVal_5228 Int) (v_ArrVal_5238 Int) (v_ArrVal_5236 Int) (v_ArrVal_5245 Int) (v_ArrVal_5222 Int) (v_ArrVal_5264 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memset_impl_#in~s.base| (store (store (store (store (store (store (store (store (select |c_old(#memory_int)| |c_memset_impl_#in~s.base|) |c_memset_impl_#in~s.offset| v_ArrVal_5222) (+ |c_memset_impl_#in~s.offset| 1) v_ArrVal_5228) (+ 2 |c_memset_impl_#in~s.offset|) v_ArrVal_5236) (+ 3 |c_memset_impl_#in~s.offset|) v_ArrVal_5238) (+ |c_memset_impl_#in~s.offset| 4) v_ArrVal_5245) (+ 5 |c_memset_impl_#in~s.offset|) v_ArrVal_5251) (+ 6 |c_memset_impl_#in~s.offset|) v_ArrVal_5261) (+ 7 |c_memset_impl_#in~s.offset|) v_ArrVal_5264))))) is different from true [2021-12-07 00:17:58,864 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5251 Int) (v_ArrVal_5261 Int) (v_ArrVal_5228 Int) (v_ArrVal_5238 Int) (v_ArrVal_5236 Int) (v_ArrVal_5245 Int) (v_ArrVal_5222 Int) (v_ArrVal_5264 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memset_#in~s.base| (store (store (store (store (store (store (store (store (select |c_old(#memory_int)| |c_my_memset_#in~s.base|) |c_my_memset_#in~s.offset| v_ArrVal_5222) (+ |c_my_memset_#in~s.offset| 1) v_ArrVal_5228) (+ 2 |c_my_memset_#in~s.offset|) v_ArrVal_5236) (+ 3 |c_my_memset_#in~s.offset|) v_ArrVal_5238) (+ |c_my_memset_#in~s.offset| 4) v_ArrVal_5245) (+ 5 |c_my_memset_#in~s.offset|) v_ArrVal_5251) (+ 6 |c_my_memset_#in~s.offset|) v_ArrVal_5261) (+ 7 |c_my_memset_#in~s.offset|) v_ArrVal_5264)))) (exists ((v_ArrVal_5240 Int) (v_ArrVal_5237 Int) (v_ArrVal_5246 Int) (v_ArrVal_5223 Int) (v_ArrVal_5256 Int) (v_ArrVal_5254 Int) (v_ArrVal_5265 Int) (v_ArrVal_5230 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_my_memset_#in~s.base| (store (store (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_my_memset_#in~s.base|) |c_my_memset_#in~s.offset| v_ArrVal_5223) (+ |c_my_memset_#in~s.offset| 1) v_ArrVal_5230) (+ 2 |c_my_memset_#in~s.offset|) v_ArrVal_5237) (+ 3 |c_my_memset_#in~s.offset|) v_ArrVal_5240) (+ |c_my_memset_#in~s.offset| 4) v_ArrVal_5246) (+ 5 |c_my_memset_#in~s.offset|) v_ArrVal_5254) (+ 6 |c_my_memset_#in~s.offset|) v_ArrVal_5256) (+ 7 |c_my_memset_#in~s.offset|) v_ArrVal_5265)))) (exists ((v_ArrVal_5250 Int) (v_ArrVal_5260 Int) (v_ArrVal_5226 Int) (v_ArrVal_5234 Int) (v_ArrVal_5244 Int) (v_ArrVal_5220 Int) (v_ArrVal_5242 Int) (v_ArrVal_5263 Int)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_my_memset_#in~s.base| (store (store (store (store (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_my_memset_#in~s.base|) |c_my_memset_#in~s.offset| v_ArrVal_5220) (+ |c_my_memset_#in~s.offset| 1) v_ArrVal_5226) (+ 2 |c_my_memset_#in~s.offset|) v_ArrVal_5234) (+ 3 |c_my_memset_#in~s.offset|) v_ArrVal_5242) (+ |c_my_memset_#in~s.offset| 4) v_ArrVal_5244) (+ 5 |c_my_memset_#in~s.offset|) v_ArrVal_5250) (+ 6 |c_my_memset_#in~s.offset|) v_ArrVal_5260) (+ 7 |c_my_memset_#in~s.offset|) v_ArrVal_5263))))) is different from true [2021-12-07 00:18:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:06,860 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 71 treesize of output 66 [2021-12-07 00:18:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:06,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:06,948 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 64 treesize of output 61 [2021-12-07 00:18:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:06,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:06,964 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 70 treesize of output 65 [2021-12-07 00:18:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,772 INFO L244 Elim1Store]: Index analysis took 755 ms [2021-12-07 00:18:07,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 88 [2021-12-07 00:18:07,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 45 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 97 [2021-12-07 00:18:07,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:07,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 45 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 98 [2021-12-07 00:18:07,914 INFO L354 Elim1Store]: treesize reduction 53, result has 32.9 percent of original size [2021-12-07 00:18:07,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 53 [2021-12-07 00:18:12,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:18:12,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 00:18:12,501 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 10 treesize of output 6 [2021-12-07 00:18:12,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 00:18:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 00:18:13,520 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5269 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5269))) (exists ((v_ArrVal_5270 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5270))) (exists ((v_ArrVal_5268 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5268) |c_#memory_$Pointer$.base|))) is different from true [2021-12-07 00:18:17,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:18:17,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:18:17,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:18:17,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 00:18:19,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:19,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 53 [2021-12-07 00:18:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:19,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2021-12-07 00:18:19,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:19,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2021-12-07 00:18:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:18:19,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2021-12-07 00:18:19,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 00:18:19,658 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 30 treesize of output 24 [2021-12-07 00:18:19,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-07 00:18:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 79 proven. 322 refuted. 17 times theorem prover too weak. 127 trivial. 18 not checked. [2021-12-07 00:18:21,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:22,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280563551] [2021-12-07 00:18:22,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:18:22,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056228976] [2021-12-07 00:18:22,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056228976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:18:22,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:18:22,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2021-12-07 00:18:22,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569137486] [2021-12-07 00:18:22,645 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:22,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-07 00:18:22,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-07 00:18:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=7725, Unknown=179, NotChecked=910, Total=9120 [2021-12-07 00:18:22,648 INFO L87 Difference]: Start difference. First operand 370 states and 469 transitions. Second operand has 95 states, 84 states have (on average 2.2142857142857144) internal successors, (186), 83 states have internal predecessors, (186), 28 states have call successors, (37), 10 states have call predecessors, (37), 24 states have return successors, (38), 29 states have call predecessors, (38), 28 states have call successors, (38) [2021-12-07 00:18:30,444 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5269 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5269))) (exists ((v_ArrVal_5218 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5218))) (exists ((v_ArrVal_5216 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5216))) (exists ((v_ArrVal_5203 Int) (|v___CPROVER_overflow_mult_~#c~1.base_541| Int)) (and (= (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_541| v_ArrVal_5203) |c_#valid|) (= (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_541|) 0))) (exists ((v_ArrVal_5270 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5270))) (exists ((v_ArrVal_5217 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5217))) (exists ((v_ArrVal_5211 Int)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_5211)))) (exists ((v_ArrVal_5205 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5205) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_5268 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5268) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_5204 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5204))) (exists ((v_ArrVal_5210 Int)) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_5210)) |c_#memory_$Pointer$.base|))) is different from true [2021-12-07 00:18:41,089 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 87 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:18:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:18:53,596 INFO L93 Difference]: Finished difference Result 613 states and 813 transitions. [2021-12-07 00:18:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-07 00:18:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 84 states have (on average 2.2142857142857144) internal successors, (186), 83 states have internal predecessors, (186), 28 states have call successors, (37), 10 states have call predecessors, (37), 24 states have return successors, (38), 29 states have call predecessors, (38), 28 states have call successors, (38) Word has length 298 [2021-12-07 00:18:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:18:53,601 INFO L225 Difference]: With dead ends: 613 [2021-12-07 00:18:53,601 INFO L226 Difference]: Without dead ends: 557 [2021-12-07 00:18:53,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 212 SyntacticMatches, 12 SemanticMatches, 122 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 4455 ImplicationChecksByTransitivity, 156.8s TimeCoverageRelationStatistics Valid=517, Invalid=13055, Unknown=258, NotChecked=1422, Total=15252 [2021-12-07 00:18:53,606 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 114 mSDsluCounter, 4647 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4838 SdHoareTripleChecker+Invalid, 8129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6533 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:18:53,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 4838 Invalid, 8129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1535 Invalid, 0 Unknown, 6533 Unchecked, 0.9s Time] [2021-12-07 00:18:53,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-07 00:18:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 536. [2021-12-07 00:18:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 413 states have (on average 1.188861985472155) internal successors, (491), 426 states have internal predecessors, (491), 64 states have call successors, (64), 32 states have call predecessors, (64), 58 states have return successors, (145), 78 states have call predecessors, (145), 63 states have call successors, (145) [2021-12-07 00:18:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 700 transitions. [2021-12-07 00:18:53,632 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 700 transitions. Word has length 298 [2021-12-07 00:18:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:18:53,633 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 700 transitions. [2021-12-07 00:18:53,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 84 states have (on average 2.2142857142857144) internal successors, (186), 83 states have internal predecessors, (186), 28 states have call successors, (37), 10 states have call predecessors, (37), 24 states have return successors, (38), 29 states have call predecessors, (38), 28 states have call successors, (38) [2021-12-07 00:18:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 700 transitions. [2021-12-07 00:18:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-07 00:18:53,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:18:53,636 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:18:53,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-07 00:18:53,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:53,838 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:18:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:53,839 INFO L85 PathProgramCache]: Analyzing trace with hash 455651875, now seen corresponding path program 1 times [2021-12-07 00:18:53,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:53,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046516057] [2021-12-07 00:18:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:53,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:53,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:18:53,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995366743] [2021-12-07 00:18:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:53,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:53,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:53,931 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:53,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-07 00:18:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:54,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 3507 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 00:18:54,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 257 proven. 6 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-07 00:18:54,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 58 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-12-07 00:18:55,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:55,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046516057] [2021-12-07 00:18:55,357 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:18:55,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995366743] [2021-12-07 00:18:55,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995366743] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:18:55,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:18:55,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-12-07 00:18:55,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345908849] [2021-12-07 00:18:55,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:55,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:18:55,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:18:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:18:55,358 INFO L87 Difference]: Start difference. First operand 536 states and 700 transitions. Second operand has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 15 states have internal predecessors, (150), 3 states have call successors, (34), 2 states have call predecessors, (34), 9 states have return successors, (39), 8 states have call predecessors, (39), 3 states have call successors, (39) [2021-12-07 00:18:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:18:55,560 INFO L93 Difference]: Finished difference Result 785 states and 1037 transitions. [2021-12-07 00:18:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 00:18:55,561 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 15 states have internal predecessors, (150), 3 states have call successors, (34), 2 states have call predecessors, (34), 9 states have return successors, (39), 8 states have call predecessors, (39), 3 states have call successors, (39) Word has length 304 [2021-12-07 00:18:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:18:55,563 INFO L225 Difference]: With dead ends: 785 [2021-12-07 00:18:55,563 INFO L226 Difference]: Without dead ends: 548 [2021-12-07 00:18:55,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:18:55,565 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 24 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:18:55,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2728 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:18:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-07 00:18:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 541. [2021-12-07 00:18:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 417 states have (on average 1.1894484412470023) internal successors, (496), 431 states have internal predecessors, (496), 64 states have call successors, (64), 32 states have call predecessors, (64), 59 states have return successors, (147), 78 states have call predecessors, (147), 63 states have call successors, (147) [2021-12-07 00:18:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 707 transitions. [2021-12-07 00:18:55,590 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 707 transitions. Word has length 304 [2021-12-07 00:18:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:18:55,590 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 707 transitions. [2021-12-07 00:18:55,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 15 states have internal predecessors, (150), 3 states have call successors, (34), 2 states have call predecessors, (34), 9 states have return successors, (39), 8 states have call predecessors, (39), 3 states have call successors, (39) [2021-12-07 00:18:55,590 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 707 transitions. [2021-12-07 00:18:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-07 00:18:55,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:18:55,593 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:18:55,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-07 00:18:55,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:55,793 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:18:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash 350731700, now seen corresponding path program 1 times [2021-12-07 00:18:55,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:55,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832949102] [2021-12-07 00:18:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:55,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:55,846 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:18:55,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063522425] [2021-12-07 00:18:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:55,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:55,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:55,847 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:55,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-07 00:18:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:56,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 3484 conjuncts, 205 conjunts are in the unsatisfiable core [2021-12-07 00:18:56,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:56,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:18:56,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:18:56,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:18:56,597 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6130 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_6130))) (exists ((v_ArrVal_6131 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_6131)))) is different from true [2021-12-07 00:18:58,092 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6135 (Array Int Int)) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_6136 Int) (v_ArrVal_6132 Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_6132))) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_6135)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_6136))))) is different from true [2021-12-07 00:18:58,131 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6135 (Array Int Int)) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_6136 Int) (v_ArrVal_6132 Int)) (and (= (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_6136)) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_6132))) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_6135)))) is different from true [2021-12-07 00:18:58,256 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 00:18:58,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2021-12-07 00:18:58,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-12-07 00:19:30,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:30,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:30,506 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-07 00:19:30,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 107 [2021-12-07 00:19:30,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:30,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:30,572 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-07 00:19:30,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 102 [2021-12-07 00:19:30,596 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:19:30,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 00:19:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:30,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 78 [2021-12-07 00:19:31,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:31,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 89 [2021-12-07 00:19:31,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:31,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-12-07 00:19:31,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:31,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-12-07 00:19:31,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-12-07 00:19:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:31,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-07 00:19:31,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-07 00:19:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-07 00:19:31,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-07 00:19:31,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-07 00:19:31,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-12-07 00:19:31,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-07 00:19:31,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-12-07 00:19:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:19:31,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-07 00:19:31,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-12-07 00:19:31,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-07 00:19:32,816 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6141 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_6139 (Array Int Int)) (v_ArrVal_6137 Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_6137))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_6141))) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_6139)))) is different from true [2021-12-07 00:19:43,230 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6141 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_6139 (Array Int Int)) (v_ArrVal_6137 Int)) (let ((.cse0 (+ |c_aws_array_list_clean_up_#in~list.offset| 32))) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_6137)) |c_aws_array_list_clean_up_#in~list.base|) .cse0) 0) (= (mod (select (select (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_6139) |c_aws_array_list_clean_up_#in~list.base|) (+ |c_aws_array_list_clean_up_#in~list.offset| 8)) 18446744073709551616) 0) (= (select (select (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_6141)) |c_aws_array_list_clean_up_#in~list.base|) .cse0) 0)))) is different from true [2021-12-07 00:19:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 307 proven. 43 refuted. 0 times theorem prover too weak. 205 trivial. 25 not checked. [2021-12-07 00:19:43,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:19:44,196 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6168 (Array Int Int)) (v_ArrVal_6170 Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_388| Int) (v_ArrVal_6169 Int)) (let ((.cse0 (+ 40 |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.offset|))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_388| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_388|) 0 v_ArrVal_6169)) |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.base|) .cse0) 0)) (not (= (mod (select (select (store |c_#memory_int| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_388| v_ArrVal_6168) |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.base|) (+ |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.offset| 16)) 18446744073709551616) 0)) (not (= (select (select (store |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_388| (store (select |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_388|) 0 v_ArrVal_6170)) |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.base|) .cse0) 0))))) is different from false [2021-12-07 00:19:44,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:19:44,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832949102] [2021-12-07 00:19:44,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:19:44,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063522425] [2021-12-07 00:19:44,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063522425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:19:44,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:19:44,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-12-07 00:19:44,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748184903] [2021-12-07 00:19:44,202 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:19:44,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 00:19:44,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:19:44,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 00:19:44,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1760, Unknown=24, NotChecked=534, Total=2450 [2021-12-07 00:19:44,203 INFO L87 Difference]: Start difference. First operand 541 states and 707 transitions. Second operand has 49 states, 42 states have (on average 3.761904761904762) internal successors, (158), 41 states have internal predecessors, (158), 17 states have call successors, (35), 7 states have call predecessors, (35), 14 states have return successors, (34), 18 states have call predecessors, (34), 17 states have call successors, (34) [2021-12-07 00:20:04,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:20:04,083 INFO L93 Difference]: Finished difference Result 842 states and 1118 transitions. [2021-12-07 00:20:04,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 00:20:04,083 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 42 states have (on average 3.761904761904762) internal successors, (158), 41 states have internal predecessors, (158), 17 states have call successors, (35), 7 states have call predecessors, (35), 14 states have return successors, (34), 18 states have call predecessors, (34), 17 states have call successors, (34) Word has length 297 [2021-12-07 00:20:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:20:04,086 INFO L225 Difference]: With dead ends: 842 [2021-12-07 00:20:04,086 INFO L226 Difference]: Without dead ends: 606 [2021-12-07 00:20:04,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 341 SyntacticMatches, 8 SemanticMatches, 75 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=309, Invalid=4626, Unknown=59, NotChecked=858, Total=5852 [2021-12-07 00:20:04,089 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 181 mSDsluCounter, 3033 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 3203 SdHoareTripleChecker+Invalid, 5818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3488 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:20:04,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 3203 Invalid, 5818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2213 Invalid, 0 Unknown, 3488 Unchecked, 1.2s Time] [2021-12-07 00:20:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-12-07 00:20:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 587. [2021-12-07 00:20:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 454 states have (on average 1.1916299559471366) internal successors, (541), 470 states have internal predecessors, (541), 69 states have call successors, (69), 32 states have call predecessors, (69), 63 states have return successors, (178), 85 states have call predecessors, (178), 68 states have call successors, (178) [2021-12-07 00:20:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 788 transitions. [2021-12-07 00:20:04,115 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 788 transitions. Word has length 297 [2021-12-07 00:20:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:20:04,115 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 788 transitions. [2021-12-07 00:20:04,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 42 states have (on average 3.761904761904762) internal successors, (158), 41 states have internal predecessors, (158), 17 states have call successors, (35), 7 states have call predecessors, (35), 14 states have return successors, (34), 18 states have call predecessors, (34), 17 states have call successors, (34) [2021-12-07 00:20:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 788 transitions. [2021-12-07 00:20:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-07 00:20:04,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:20:04,118 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:20:04,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-07 00:20:04,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:20:04,320 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:20:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:20:04,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1880858922, now seen corresponding path program 1 times [2021-12-07 00:20:04,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:20:04,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309552663] [2021-12-07 00:20:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:20:04,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:20:04,402 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:20:04,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455311744] [2021-12-07 00:20:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:20:04,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:20:04,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:20:04,403 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:20:04,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-07 00:20:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:20:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 3503 conjuncts, 193 conjunts are in the unsatisfiable core [2021-12-07 00:20:04,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:20:04,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:20:05,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:20:07,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:20:07,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 00:20:13,745 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 00:20:13,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 00:20:13,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:20:13,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:20:13,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:20:13,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-07 00:20:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:20:13,764 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 [2021-12-07 00:20:13,883 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6613 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_6613) |c_#memory_$Pointer$.base|)) is different from true [2021-12-07 00:20:15,354 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6615 Int)) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_6615)) |c_#memory_$Pointer$.base|)) is different from true [2021-12-07 00:20:17,361 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_array_list_is_valid_~#required_size~0.base| Int) (v_ArrVal_6615 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base|) 0 v_ArrVal_6615)))) is different from true [2021-12-07 00:20:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:20:17,540 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-07 00:20:17,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 84 [2021-12-07 00:20:17,549 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:20:17,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 00:20:17,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 00:20:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:20:17,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-12-07 00:20:17,618 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 8 treesize of output 7 [2021-12-07 00:20:17,661 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 8 treesize of output 7 [2021-12-07 00:20:17,748 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-07 00:20:17,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:20:17,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-07 00:20:19,233 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6617 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_6617)))) is different from true [2021-12-07 00:20:21,241 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6617 Int) (|aws_array_list_is_valid_~#required_size~0.base| Int)) (= (store |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base|) 0 v_ArrVal_6617)) |c_#memory_$Pointer$.base|)) is different from true [2021-12-07 00:20:24,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:20:35,405 WARN L227 SmtUtils]: Spent 6.87s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:20:44,968 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6617 Int) (|aws_array_list_is_valid_~#required_size~0.base| Int)) (= (select (select (store |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base|) 0 v_ArrVal_6617)) |c_aws_array_list_clean_up_#in~list.base|) |c_aws_array_list_clean_up_#in~list.offset|) 0)) is different from true [2021-12-07 00:20:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 299 proven. 55 refuted. 0 times theorem prover too weak. 179 trivial. 30 not checked. [2021-12-07 00:20:45,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:20:46,697 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6627 Int) (|v_aws_array_list_is_valid_~#required_size~0.base_362| Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_array_list_is_valid_~#required_size~0.base_362| (store (select |c_#memory_$Pointer$.base| |v_aws_array_list_is_valid_~#required_size~0.base_362|) 0 v_ArrVal_6627)) |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.base|) (+ |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.offset| 8)) 0))) is different from false [2021-12-07 00:20:46,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:20:46,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309552663] [2021-12-07 00:20:46,700 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:20:46,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455311744] [2021-12-07 00:20:46,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455311744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:20:46,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:20:46,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-12-07 00:20:46,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949768626] [2021-12-07 00:20:46,700 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:20:46,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 00:20:46,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:20:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 00:20:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1343, Unknown=31, NotChecked=560, Total=2070 [2021-12-07 00:20:46,702 INFO L87 Difference]: Start difference. First operand 587 states and 788 transitions. Second operand has 45 states, 40 states have (on average 4.175) internal successors, (167), 39 states have internal predecessors, (167), 22 states have call successors, (37), 9 states have call predecessors, (37), 17 states have return successors, (37), 21 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-07 00:21:09,365 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6617 Int) (|aws_array_list_is_valid_~#required_size~0.base| Int)) (= (store |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base|) 0 v_ArrVal_6617)) |c_#memory_$Pointer$.base|)) (exists ((|aws_array_list_is_valid_~#required_size~0.base| Int) (v_ArrVal_6615 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base|) 0 v_ArrVal_6615))))) is different from true [2021-12-07 00:21:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:33,441 INFO L93 Difference]: Finished difference Result 1114 states and 1515 transitions. [2021-12-07 00:21:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-07 00:21:33,442 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 4.175) internal successors, (167), 39 states have internal predecessors, (167), 22 states have call successors, (37), 9 states have call predecessors, (37), 17 states have return successors, (37), 21 states have call predecessors, (37), 22 states have call successors, (37) Word has length 298 [2021-12-07 00:21:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:33,447 INFO L225 Difference]: With dead ends: 1114 [2021-12-07 00:21:33,447 INFO L226 Difference]: Without dead ends: 866 [2021-12-07 00:21:33,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 346 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 86.0s TimeCoverageRelationStatistics Valid=327, Invalid=3771, Unknown=94, NotChecked=1064, Total=5256 [2021-12-07 00:21:33,451 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 360 mSDsluCounter, 3263 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 3542 SdHoareTripleChecker+Invalid, 7039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4310 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:33,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 3542 Invalid, 7039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2472 Invalid, 0 Unknown, 4310 Unchecked, 1.2s Time] [2021-12-07 00:21:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-12-07 00:21:33,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 821. [2021-12-07 00:21:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 632 states have (on average 1.1962025316455696) internal successors, (756), 656 states have internal predecessors, (756), 100 states have call successors, (100), 50 states have call predecessors, (100), 88 states have return successors, (279), 116 states have call predecessors, (279), 98 states have call successors, (279) [2021-12-07 00:21:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1135 transitions. [2021-12-07 00:21:33,495 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1135 transitions. Word has length 298 [2021-12-07 00:21:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:33,495 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1135 transitions. [2021-12-07 00:21:33,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 4.175) internal successors, (167), 39 states have internal predecessors, (167), 22 states have call successors, (37), 9 states have call predecessors, (37), 17 states have return successors, (37), 21 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-07 00:21:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1135 transitions. [2021-12-07 00:21:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-07 00:21:33,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:33,499 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:33,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-07 00:21:33,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:33,700 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:33,701 INFO L85 PathProgramCache]: Analyzing trace with hash -927479548, now seen corresponding path program 1 times [2021-12-07 00:21:33,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:33,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551534913] [2021-12-07 00:21:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:33,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:33,797 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:21:33,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66556949] [2021-12-07 00:21:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:33,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:33,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:33,798 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:33,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-07 00:21:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:34,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 3546 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:21:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-12-07 00:21:34,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:21:34,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:34,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551534913] [2021-12-07 00:21:34,630 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:21:34,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66556949] [2021-12-07 00:21:34,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66556949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:21:34,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:21:34,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:21:34,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273662858] [2021-12-07 00:21:34,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:21:34,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:21:34,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:21:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:21:34,631 INFO L87 Difference]: Start difference. First operand 821 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-12-07 00:21:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:34,930 INFO L93 Difference]: Finished difference Result 1272 states and 1772 transitions. [2021-12-07 00:21:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:21:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 310 [2021-12-07 00:21:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:34,937 INFO L225 Difference]: With dead ends: 1272 [2021-12-07 00:21:34,937 INFO L226 Difference]: Without dead ends: 833 [2021-12-07 00:21:34,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:21:34,940 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 15 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:34,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 719 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:21:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-12-07 00:21:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 818. [2021-12-07 00:21:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 630 states have (on average 1.192063492063492) internal successors, (751), 653 states have internal predecessors, (751), 100 states have call successors, (100), 50 states have call predecessors, (100), 87 states have return successors, (273), 116 states have call predecessors, (273), 98 states have call successors, (273) [2021-12-07 00:21:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1124 transitions. [2021-12-07 00:21:34,980 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1124 transitions. Word has length 310 [2021-12-07 00:21:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:34,981 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1124 transitions. [2021-12-07 00:21:34,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-12-07 00:21:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1124 transitions. [2021-12-07 00:21:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-07 00:21:34,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:34,985 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:35,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-07 00:21:35,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-07 00:21:35,186 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:35,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1655171651, now seen corresponding path program 1 times [2021-12-07 00:21:35,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:35,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771827337] [2021-12-07 00:21:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:35,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:35,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:21:35,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733184453] [2021-12-07 00:21:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:35,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:35,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:35,283 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:35,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-07 00:21:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 3565 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:21:35,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:38,198 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_array_list_clean_up_#in~list.offset_BEFORE_CALL_25| Int) (|v_aws_array_list_clean_up_#in~list.base_BEFORE_CALL_33| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_array_list_clean_up_#in~list.base_BEFORE_CALL_33|) (+ 32 |v_aws_array_list_clean_up_#in~list.offset_BEFORE_CALL_25|)) 0))) (exists ((|v_aws_array_list_clean_up_#in~list.offset_BEFORE_CALL_25| Int) (|v_aws_array_list_clean_up_#in~list.base_BEFORE_CALL_33| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_array_list_clean_up_#in~list.base_BEFORE_CALL_33|) (+ 32 |v_aws_array_list_clean_up_#in~list.offset_BEFORE_CALL_25|)) 0)))) is different from true [2021-12-07 00:21:38,280 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 43 treesize of output 31 [2021-12-07 00:21:38,281 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 31 treesize of output 19 [2021-12-07 00:21:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 269 proven. 1 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-07 00:21:38,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:21:38,612 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-07 00:21:38,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-07 00:21:38,618 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-07 00:21:38,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-07 00:21:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-12-07 00:21:38,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771827337] [2021-12-07 00:21:38,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:21:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733184453] [2021-12-07 00:21:38,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733184453] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:21:38,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:21:38,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 18 [2021-12-07 00:21:38,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655216301] [2021-12-07 00:21:38,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:21:38,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:21:38,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:21:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=234, Unknown=1, NotChecked=30, Total=306 [2021-12-07 00:21:38,864 INFO L87 Difference]: Start difference. First operand 818 states and 1124 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-07 00:21:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:39,162 INFO L93 Difference]: Finished difference Result 1203 states and 1658 transitions. [2021-12-07 00:21:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:21:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 310 [2021-12-07 00:21:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:39,167 INFO L225 Difference]: With dead ends: 1203 [2021-12-07 00:21:39,167 INFO L226 Difference]: Without dead ends: 847 [2021-12-07 00:21:39,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 602 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=63, Invalid=360, Unknown=1, NotChecked=38, Total=462 [2021-12-07 00:21:39,169 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 32 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:39,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1085 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:21:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-12-07 00:21:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 828. [2021-12-07 00:21:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 638 states have (on average 1.1927899686520376) internal successors, (761), 659 states have internal predecessors, (761), 102 states have call successors, (102), 50 states have call predecessors, (102), 87 states have return successors, (275), 120 states have call predecessors, (275), 100 states have call successors, (275) [2021-12-07 00:21:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1138 transitions. [2021-12-07 00:21:39,206 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1138 transitions. Word has length 310 [2021-12-07 00:21:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:39,206 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1138 transitions. [2021-12-07 00:21:39,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-07 00:21:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1138 transitions. [2021-12-07 00:21:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-07 00:21:39,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:39,211 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:39,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-07 00:21:39,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-07 00:21:39,411 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1780854146, now seen corresponding path program 1 times [2021-12-07 00:21:39,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:39,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216152809] [2021-12-07 00:21:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:39,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:39,489 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:21:39,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327014513] [2021-12-07 00:21:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:39,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:39,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:39,490 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:39,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-07 00:21:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 3557 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:21:40,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-07 00:21:40,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:21:40,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:40,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216152809] [2021-12-07 00:21:40,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:21:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327014513] [2021-12-07 00:21:40,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327014513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:21:40,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:21:40,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:21:40,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062142122] [2021-12-07 00:21:40,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:21:40,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:21:40,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:40,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:21:40,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:21:40,327 INFO L87 Difference]: Start difference. First operand 828 states and 1138 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-12-07 00:21:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:40,606 INFO L93 Difference]: Finished difference Result 1354 states and 1881 transitions. [2021-12-07 00:21:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:21:40,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 311 [2021-12-07 00:21:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:40,610 INFO L225 Difference]: With dead ends: 1354 [2021-12-07 00:21:40,610 INFO L226 Difference]: Without dead ends: 758 [2021-12-07 00:21:40,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:21:40,613 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 7 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:40,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 741 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:21:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-12-07 00:21:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 742. [2021-12-07 00:21:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 563 states have (on average 1.1793960923623446) internal successors, (664), 580 states have internal predecessors, (664), 100 states have call successors, (100), 49 states have call predecessors, (100), 78 states have return successors, (242), 114 states have call predecessors, (242), 98 states have call successors, (242) [2021-12-07 00:21:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1006 transitions. [2021-12-07 00:21:40,646 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1006 transitions. Word has length 311 [2021-12-07 00:21:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:40,646 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1006 transitions. [2021-12-07 00:21:40,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-12-07 00:21:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1006 transitions. [2021-12-07 00:21:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-07 00:21:40,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:40,650 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:40,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-07 00:21:40,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-07 00:21:40,852 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash -310094669, now seen corresponding path program 1 times [2021-12-07 00:21:40,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:40,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479692831] [2021-12-07 00:21:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:40,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:40,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:21:40,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61109522] [2021-12-07 00:21:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:40,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:40,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:40,947 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:40,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-07 00:21:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 3534 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-07 00:21:41,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:42,129 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 43 treesize of output 31 [2021-12-07 00:21:42,131 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 31 treesize of output 19 [2021-12-07 00:21:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 261 proven. 7 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-12-07 00:21:42,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:21:43,020 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-07 00:21:43,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-07 00:21:43,027 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-07 00:21:43,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-12-07 00:21:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 61 proven. 3 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-12-07 00:21:43,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479692831] [2021-12-07 00:21:43,310 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:21:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61109522] [2021-12-07 00:21:43,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61109522] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:21:43,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:21:43,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 29 [2021-12-07 00:21:43,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088454992] [2021-12-07 00:21:43,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:21:43,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 00:21:43,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 00:21:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-12-07 00:21:43,312 INFO L87 Difference]: Start difference. First operand 742 states and 1006 transitions. Second operand has 29 states, 26 states have (on average 6.423076923076923) internal successors, (167), 26 states have internal predecessors, (167), 11 states have call successors, (54), 2 states have call predecessors, (54), 7 states have return successors, (54), 13 states have call predecessors, (54), 11 states have call successors, (54) [2021-12-07 00:21:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:44,553 INFO L93 Difference]: Finished difference Result 1132 states and 1547 transitions. [2021-12-07 00:21:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 00:21:44,553 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 6.423076923076923) internal successors, (167), 26 states have internal predecessors, (167), 11 states have call successors, (54), 2 states have call predecessors, (54), 7 states have return successors, (54), 13 states have call predecessors, (54), 11 states have call successors, (54) Word has length 309 [2021-12-07 00:21:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:44,557 INFO L225 Difference]: With dead ends: 1132 [2021-12-07 00:21:44,557 INFO L226 Difference]: Without dead ends: 774 [2021-12-07 00:21:44,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-12-07 00:21:44,560 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 64 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:44,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 3048 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 967 Invalid, 0 Unknown, 143 Unchecked, 0.7s Time] [2021-12-07 00:21:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-12-07 00:21:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 737. [2021-12-07 00:21:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 559 states have (on average 1.1788908765652952) internal successors, (659), 578 states have internal predecessors, (659), 99 states have call successors, (99), 49 states have call predecessors, (99), 78 states have return successors, (241), 111 states have call predecessors, (241), 97 states have call successors, (241) [2021-12-07 00:21:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 999 transitions. [2021-12-07 00:21:44,597 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 999 transitions. Word has length 309 [2021-12-07 00:21:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:44,598 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 999 transitions. [2021-12-07 00:21:44,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 6.423076923076923) internal successors, (167), 26 states have internal predecessors, (167), 11 states have call successors, (54), 2 states have call predecessors, (54), 7 states have return successors, (54), 13 states have call predecessors, (54), 11 states have call successors, (54) [2021-12-07 00:21:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 999 transitions. [2021-12-07 00:21:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-07 00:21:44,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:44,601 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:44,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-07 00:21:44,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:44,803 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:44,804 INFO L85 PathProgramCache]: Analyzing trace with hash 298727197, now seen corresponding path program 1 times [2021-12-07 00:21:44,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:44,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382182900] [2021-12-07 00:21:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:44,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:44,884 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:21:44,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473302730] [2021-12-07 00:21:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:44,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:44,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:44,885 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:44,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-07 00:21:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 3477 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-07 00:21:45,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:47,839 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8808 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_8808)))) is different from true [2021-12-07 00:21:49,847 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8808 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_8808)))) is different from true [2021-12-07 00:21:49,876 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-07 00:21:49,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 33 [2021-12-07 00:21:52,345 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_8811 Int)) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_8811)) |c_#memory_int|)) is different from true [2021-12-07 00:22:13,227 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_8811 Int)) (= (mod (select (select (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_8811)) |c_aws_array_list_clean_up_#in~list.base|) (+ |c_aws_array_list_clean_up_#in~list.offset| 8)) 18446744073709551616) 0)) is different from true [2021-12-07 00:22:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 329 proven. 17 refuted. 0 times theorem prover too weak. 215 trivial. 21 not checked. [2021-12-07 00:22:13,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:22:15,905 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_8821 Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_491| Int)) (not (= (mod (select (select (store |c_#memory_int| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_491| (store (select |c_#memory_int| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_491|) 0 v_ArrVal_8821)) |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.base|) (+ |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.offset| 16)) 18446744073709551616) 0))) is different from false [2021-12-07 00:22:15,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:22:15,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382182900] [2021-12-07 00:22:15,909 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:22:15,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473302730] [2021-12-07 00:22:15,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473302730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:22:15,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:22:15,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-07 00:22:15,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783146665] [2021-12-07 00:22:15,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:22:15,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 00:22:15,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:22:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 00:22:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=364, Unknown=12, NotChecked=210, Total=650 [2021-12-07 00:22:15,911 INFO L87 Difference]: Start difference. First operand 737 states and 999 transitions. Second operand has 25 states, 22 states have (on average 7.136363636363637) internal successors, (157), 23 states have internal predecessors, (157), 13 states have call successors, (35), 4 states have call predecessors, (35), 10 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-07 00:22:18,583 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8808 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_8808)))) (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_8811 Int)) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_8811)) |c_#memory_int|))) is different from true [2021-12-07 00:22:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:22:47,175 INFO L93 Difference]: Finished difference Result 1299 states and 1847 transitions. [2021-12-07 00:22:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:22:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 7.136363636363637) internal successors, (157), 23 states have internal predecessors, (157), 13 states have call successors, (35), 4 states have call predecessors, (35), 10 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 298 [2021-12-07 00:22:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:22:47,180 INFO L225 Difference]: With dead ends: 1299 [2021-12-07 00:22:47,180 INFO L226 Difference]: Without dead ends: 946 [2021-12-07 00:22:47,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 370 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 58.5s TimeCoverageRelationStatistics Valid=115, Invalid=699, Unknown=22, NotChecked=354, Total=1190 [2021-12-07 00:22:47,182 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 188 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2402 SdHoareTripleChecker+Invalid, 3724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2043 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:22:47,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 2402 Invalid, 3724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1622 Invalid, 0 Unknown, 2043 Unchecked, 1.9s Time] [2021-12-07 00:22:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-12-07 00:22:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 819. [2021-12-07 00:22:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 623 states have (on average 1.1765650080256822) internal successors, (733), 644 states have internal predecessors, (733), 109 states have call successors, (109), 51 states have call predecessors, (109), 86 states have return successors, (295), 125 states have call predecessors, (295), 107 states have call successors, (295) [2021-12-07 00:22:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1137 transitions. [2021-12-07 00:22:47,228 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1137 transitions. Word has length 298 [2021-12-07 00:22:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:22:47,228 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1137 transitions. [2021-12-07 00:22:47,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 7.136363636363637) internal successors, (157), 23 states have internal predecessors, (157), 13 states have call successors, (35), 4 states have call predecessors, (35), 10 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-07 00:22:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1137 transitions. [2021-12-07 00:22:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-07 00:22:47,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:22:47,233 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:22:47,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-07 00:22:47,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 00:22:47,434 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:22:47,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:22:47,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1782951336, now seen corresponding path program 1 times [2021-12-07 00:22:47,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:22:47,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49948188] [2021-12-07 00:22:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:22:47,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:22:47,502 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:22:47,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304584431] [2021-12-07 00:22:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:22:47,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:22:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:22:47,503 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:22:47,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-07 00:22:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:22:48,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 3516 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-07 00:22:48,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:22:48,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:22:48,739 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 00:22:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:22:51,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:22:51,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 00:22:56,729 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 00:22:56,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 00:22:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:22:56,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:22:56,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:22:56,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-07 00:22:56,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:22:56,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:22:57,029 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9264 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_9264))) is different from true [2021-12-07 00:22:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 141 proven. 31 refuted. 3 times theorem prover too weak. 394 trivial. 0 not checked. [2021-12-07 00:22:58,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:22:59,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:22:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49948188] [2021-12-07 00:22:59,254 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:22:59,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304584431] [2021-12-07 00:22:59,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304584431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:22:59,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:22:59,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-07 00:22:59,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158019116] [2021-12-07 00:22:59,255 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:22:59,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 00:22:59,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:22:59,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 00:22:59,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=646, Unknown=23, NotChecked=52, Total=812 [2021-12-07 00:22:59,257 INFO L87 Difference]: Start difference. First operand 819 states and 1137 transitions. Second operand has 28 states, 26 states have (on average 5.269230769230769) internal successors, (137), 24 states have internal predecessors, (137), 14 states have call successors, (31), 7 states have call predecessors, (31), 10 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-07 00:23:02,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:23:02,777 INFO L93 Difference]: Finished difference Result 1275 states and 1763 transitions. [2021-12-07 00:23:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 00:23:02,778 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 5.269230769230769) internal successors, (137), 24 states have internal predecessors, (137), 14 states have call successors, (31), 7 states have call predecessors, (31), 10 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 302 [2021-12-07 00:23:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:23:02,783 INFO L225 Difference]: With dead ends: 1275 [2021-12-07 00:23:02,783 INFO L226 Difference]: Without dead ends: 947 [2021-12-07 00:23:02,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 447 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=134, Invalid=1021, Unknown=39, NotChecked=66, Total=1260 [2021-12-07 00:23:02,786 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 186 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1757 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:23:02,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 2256 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1134 Invalid, 0 Unknown, 1757 Unchecked, 1.6s Time] [2021-12-07 00:23:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-12-07 00:23:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 840. [2021-12-07 00:23:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 641 states have (on average 1.1825273010920436) internal successors, (758), 663 states have internal predecessors, (758), 111 states have call successors, (111), 51 states have call predecessors, (111), 87 states have return successors, (291), 127 states have call predecessors, (291), 109 states have call successors, (291) [2021-12-07 00:23:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1160 transitions. [2021-12-07 00:23:02,830 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1160 transitions. Word has length 302 [2021-12-07 00:23:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:23:02,830 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1160 transitions. [2021-12-07 00:23:02,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 5.269230769230769) internal successors, (137), 24 states have internal predecessors, (137), 14 states have call successors, (31), 7 states have call predecessors, (31), 10 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-07 00:23:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1160 transitions. [2021-12-07 00:23:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-12-07 00:23:02,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:23:02,835 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:23:02,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-07 00:23:03,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-07 00:23:03,036 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:23:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:23:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2145354443, now seen corresponding path program 1 times [2021-12-07 00:23:03,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:23:03,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780738931] [2021-12-07 00:23:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:23:03,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:23:03,087 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:23:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691506213] [2021-12-07 00:23:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:23:03,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:23:03,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:23:03,088 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:23:03,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-07 00:23:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:23:03,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 3518 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-07 00:23:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:23:03,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:23:03,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 00:23:03,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2021-12-07 00:23:07,979 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 00:23:07,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 32 [2021-12-07 00:23:08,041 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-12-07 00:23:08,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 33 [2021-12-07 00:23:15,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:23:15,773 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 32 treesize of output 25 [2021-12-07 00:23:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:23:15,787 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 32 treesize of output 25 [2021-12-07 00:23:18,368 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9716 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_9716))) is different from true [2021-12-07 00:23:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 141 proven. 25 refuted. 3 times theorem prover too weak. 408 trivial. 0 not checked. [2021-12-07 00:23:29,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:23:29,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:23:29,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780738931] [2021-12-07 00:23:29,475 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:23:29,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691506213] [2021-12-07 00:23:29,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691506213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:23:29,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:23:29,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-07 00:23:29,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558974288] [2021-12-07 00:23:29,475 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:23:29,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 00:23:29,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:23:29,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 00:23:29,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=634, Unknown=38, NotChecked=52, Total=812 [2021-12-07 00:23:29,476 INFO L87 Difference]: Start difference. First operand 840 states and 1160 transitions. Second operand has 28 states, 26 states have (on average 5.076923076923077) internal successors, (132), 24 states have internal predecessors, (132), 14 states have call successors, (31), 7 states have call predecessors, (31), 10 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-07 00:23:42,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:23:42,432 INFO L93 Difference]: Finished difference Result 1162 states and 1597 transitions. [2021-12-07 00:23:42,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 00:23:42,432 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 5.076923076923077) internal successors, (132), 24 states have internal predecessors, (132), 14 states have call successors, (31), 7 states have call predecessors, (31), 10 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 305 [2021-12-07 00:23:42,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:23:42,436 INFO L225 Difference]: With dead ends: 1162 [2021-12-07 00:23:42,436 INFO L226 Difference]: Without dead ends: 890 [2021-12-07 00:23:42,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 457 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=119, Invalid=947, Unknown=60, NotChecked=64, Total=1190 [2021-12-07 00:23:42,437 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 171 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 2960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1966 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:23:42,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1904 Invalid, 2960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 889 Invalid, 0 Unknown, 1966 Unchecked, 0.5s Time] [2021-12-07 00:23:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-12-07 00:23:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 856. [2021-12-07 00:23:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 655 states have (on average 1.1816793893129771) internal successors, (774), 677 states have internal predecessors, (774), 112 states have call successors, (112), 51 states have call predecessors, (112), 88 states have return successors, (295), 129 states have call predecessors, (295), 110 states have call successors, (295) [2021-12-07 00:23:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1181 transitions. [2021-12-07 00:23:42,486 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1181 transitions. Word has length 305 [2021-12-07 00:23:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:23:42,486 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1181 transitions. [2021-12-07 00:23:42,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 5.076923076923077) internal successors, (132), 24 states have internal predecessors, (132), 14 states have call successors, (31), 7 states have call predecessors, (31), 10 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-07 00:23:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1181 transitions. [2021-12-07 00:23:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-07 00:23:42,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:23:42,491 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:23:42,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-07 00:23:42,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:23:42,693 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:23:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:23:42,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1210681706, now seen corresponding path program 1 times [2021-12-07 00:23:42,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:23:42,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517838953] [2021-12-07 00:23:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:23:42,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:23:42,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:23:42,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025949126] [2021-12-07 00:23:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:23:42,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:23:42,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:23:42,754 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:23:42,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-07 00:23:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:23:43,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 3516 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-07 00:23:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:23:43,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:23:44,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:23:44,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 00:23:44,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:23:44,515 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 00:23:44,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:23:44,702 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 00:23:44,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 00:23:54,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:23:54,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:23:54,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:23:54,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:23:57,239 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10168 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_10168) |c_#memory_int|)) is different from true [2021-12-07 00:23:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 137 proven. 31 refuted. 3 times theorem prover too weak. 394 trivial. 0 not checked. [2021-12-07 00:23:58,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:23:59,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:23:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517838953] [2021-12-07 00:23:59,595 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:23:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025949126] [2021-12-07 00:23:59,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025949126] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:23:59,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:23:59,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-12-07 00:23:59,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002524808] [2021-12-07 00:23:59,596 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:23:59,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 00:23:59,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:23:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 00:23:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=690, Unknown=26, NotChecked=54, Total=870 [2021-12-07 00:23:59,597 INFO L87 Difference]: Start difference. First operand 856 states and 1181 transitions. Second operand has 29 states, 26 states have (on average 5.115384615384615) internal successors, (133), 25 states have internal predecessors, (133), 14 states have call successors, (31), 8 states have call predecessors, (31), 10 states have return successors, (30), 10 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-07 00:24:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:24:12,721 INFO L93 Difference]: Finished difference Result 1244 states and 1718 transitions. [2021-12-07 00:24:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 00:24:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 5.115384615384615) internal successors, (133), 25 states have internal predecessors, (133), 14 states have call successors, (31), 8 states have call predecessors, (31), 10 states have return successors, (30), 10 states have call predecessors, (30), 14 states have call successors, (30) Word has length 300 [2021-12-07 00:24:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:24:12,726 INFO L225 Difference]: With dead ends: 1244 [2021-12-07 00:24:12,726 INFO L226 Difference]: Without dead ends: 968 [2021-12-07 00:24:12,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 445 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=158, Invalid=1126, Unknown=52, NotChecked=70, Total=1406 [2021-12-07 00:24:12,728 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 218 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1617 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:24:12,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1966 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1060 Invalid, 0 Unknown, 1617 Unchecked, 1.4s Time] [2021-12-07 00:24:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-12-07 00:24:12,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 860. [2021-12-07 00:24:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 657 states have (on average 1.1811263318112633) internal successors, (776), 679 states have internal predecessors, (776), 114 states have call successors, (114), 51 states have call predecessors, (114), 88 states have return successors, (301), 131 states have call predecessors, (301), 112 states have call successors, (301) [2021-12-07 00:24:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1191 transitions. [2021-12-07 00:24:12,776 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1191 transitions. Word has length 300 [2021-12-07 00:24:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:24:12,776 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1191 transitions. [2021-12-07 00:24:12,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 5.115384615384615) internal successors, (133), 25 states have internal predecessors, (133), 14 states have call successors, (31), 8 states have call predecessors, (31), 10 states have return successors, (30), 10 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-07 00:24:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1191 transitions. [2021-12-07 00:24:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-07 00:24:12,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:24:12,781 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:24:12,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-07 00:24:12,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-07 00:24:12,981 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:24:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:24:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash -215778080, now seen corresponding path program 1 times [2021-12-07 00:24:12,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:24:12,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087708010] [2021-12-07 00:24:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:24:12,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:24:13,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:24:13,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563479689] [2021-12-07 00:24:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:24:13,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:24:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:24:13,033 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:24:13,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-07 00:24:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:24:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 3526 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-07 00:24:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:24:13,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:24:14,493 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 00:24:14,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:24:32,858 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-07 00:24:32,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 37 treesize of output 39 [2021-12-07 00:24:32,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:24:38,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:24:38,561 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-07 00:24:38,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 37 treesize of output 39 [2021-12-07 00:24:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:50,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 62 [2021-12-07 00:24:50,918 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 00:24:50,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 00:24:51,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:51,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:51,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:51,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:51,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:51,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:24:51,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 51 [2021-12-07 00:24:52,163 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10620 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_10620))) is different from true [2021-12-07 00:24:54,790 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_10621 Int)) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_10621)) |c_#memory_int|)) is different from true [2021-12-07 00:25:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 141 proven. 22 refuted. 7 times theorem prover too weak. 403 trivial. 3 not checked. [2021-12-07 00:25:06,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:25:07,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:25:07,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087708010] [2021-12-07 00:25:07,930 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:25:07,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563479689] [2021-12-07 00:25:07,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563479689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:25:07,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:25:07,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-12-07 00:25:07,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041561201] [2021-12-07 00:25:07,930 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:25:07,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 00:25:07,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:25:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 00:25:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1628, Unknown=30, NotChecked=166, Total=1980 [2021-12-07 00:25:07,932 INFO L87 Difference]: Start difference. First operand 860 states and 1191 transitions. Second operand has 44 states, 39 states have (on average 3.5641025641025643) internal successors, (139), 37 states have internal predecessors, (139), 15 states have call successors, (32), 9 states have call predecessors, (32), 13 states have return successors, (31), 14 states have call predecessors, (31), 15 states have call successors, (31) [2021-12-07 00:25:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:25:28,549 INFO L93 Difference]: Finished difference Result 1203 states and 1663 transitions. [2021-12-07 00:25:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 00:25:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 3.5641025641025643) internal successors, (139), 37 states have internal predecessors, (139), 15 states have call successors, (32), 9 states have call predecessors, (32), 13 states have return successors, (31), 14 states have call predecessors, (31), 15 states have call successors, (31) Word has length 308 [2021-12-07 00:25:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:25:28,555 INFO L225 Difference]: With dead ends: 1203 [2021-12-07 00:25:28,555 INFO L226 Difference]: Without dead ends: 927 [2021-12-07 00:25:28,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 434 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 68.3s TimeCoverageRelationStatistics Valid=226, Invalid=2588, Unknown=56, NotChecked=210, Total=3080 [2021-12-07 00:25:28,557 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 205 mSDsluCounter, 2734 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 4783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3138 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:25:28,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 2945 Invalid, 4783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1495 Invalid, 0 Unknown, 3138 Unchecked, 2.1s Time] [2021-12-07 00:25:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-12-07 00:25:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 886. [2021-12-07 00:25:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 673 states have (on average 1.1783060921248143) internal successors, (793), 696 states have internal predecessors, (793), 119 states have call successors, (119), 54 states have call predecessors, (119), 93 states have return successors, (324), 137 states have call predecessors, (324), 117 states have call successors, (324) [2021-12-07 00:25:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1236 transitions. [2021-12-07 00:25:28,599 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1236 transitions. Word has length 308 [2021-12-07 00:25:28,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:25:28,600 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1236 transitions. [2021-12-07 00:25:28,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 3.5641025641025643) internal successors, (139), 37 states have internal predecessors, (139), 15 states have call successors, (32), 9 states have call predecessors, (32), 13 states have return successors, (31), 14 states have call predecessors, (31), 15 states have call successors, (31) [2021-12-07 00:25:28,600 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1236 transitions. [2021-12-07 00:25:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-12-07 00:25:28,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:25:28,604 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:25:28,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-07 00:25:28,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-07 00:25:28,806 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:25:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:25:28,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1951930689, now seen corresponding path program 1 times [2021-12-07 00:25:28,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:25:28,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105026044] [2021-12-07 00:25:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:25:28,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:25:28,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:25:28,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519535954] [2021-12-07 00:25:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:25:28,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:25:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:25:28,890 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:25:28,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-07 00:25:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:25:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 3516 conjuncts, 189 conjunts are in the unsatisfiable core [2021-12-07 00:25:29,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:25:29,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:25:29,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:25:32,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 00:25:32,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:25:32,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:25:32,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 00:25:38,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:25:38,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:25:38,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:25:38,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-07 00:25:38,317 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 00:25:38,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 00:25:38,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:25:38,331 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 [2021-12-07 00:25:38,474 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11084 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_11084) |c_#memory_$Pointer$.base|)) is different from true [2021-12-07 00:25:38,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:25:40,758 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11087 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_11087)))) is different from true [2021-12-07 00:25:50,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2021-12-07 00:25:51,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:25:51,354 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-07 00:25:51,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 84 [2021-12-07 00:25:51,362 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:25:51,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 00:25:51,373 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 8 treesize of output 7 [2021-12-07 00:25:51,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:25:51,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:25:51,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-12-07 00:25:51,501 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 8 treesize of output 7 [2021-12-07 00:25:51,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-07 00:25:51,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-07 00:25:51,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:25:51,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-07 00:25:54,347 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11088 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_11088)))) is different from true [2021-12-07 00:25:56,355 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11088 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_11088)))) is different from true [2021-12-07 00:26:01,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:26:04,009 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_ArrVal_11088 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (select (select (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_11088)) |c_aws_array_list_clean_up_#in~list.base|) |c_aws_array_list_clean_up_#in~list.offset|) 0)) |c_aws_array_list_clean_up_#t~short148|) is different from true [2021-12-07 00:26:06,014 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11088 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (select (select (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_11088)) |c_aws_array_list_clean_up_#in~list.base|) |c_aws_array_list_clean_up_#in~list.offset|) 0)) is different from true [2021-12-07 00:26:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 297 proven. 71 refuted. 0 times theorem prover too weak. 177 trivial. 23 not checked. [2021-12-07 00:26:06,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:07,770 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_615| Int) (v_ArrVal_11099 Int)) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_615| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_615|) 0 v_ArrVal_11099)) |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.base|) (+ |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.offset| 8))))) is different from false [2021-12-07 00:26:07,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:07,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105026044] [2021-12-07 00:26:07,773 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:26:07,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519535954] [2021-12-07 00:26:07,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519535954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:07,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:26:07,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-12-07 00:26:07,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880107579] [2021-12-07 00:26:07,774 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:07,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-07 00:26:07,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:07,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-07 00:26:07,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1985, Unknown=40, NotChecked=672, Total=2862 [2021-12-07 00:26:07,775 INFO L87 Difference]: Start difference. First operand 886 states and 1236 transitions. Second operand has 53 states, 47 states have (on average 3.702127659574468) internal successors, (174), 45 states have internal predecessors, (174), 22 states have call successors, (39), 9 states have call predecessors, (39), 18 states have return successors, (38), 20 states have call predecessors, (38), 22 states have call successors, (38) [2021-12-07 00:26:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:57,781 INFO L93 Difference]: Finished difference Result 1451 states and 2000 transitions. [2021-12-07 00:26:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-07 00:26:57,781 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 47 states have (on average 3.702127659574468) internal successors, (174), 45 states have internal predecessors, (174), 22 states have call successors, (39), 9 states have call predecessors, (39), 18 states have return successors, (38), 20 states have call predecessors, (38), 22 states have call successors, (38) Word has length 305 [2021-12-07 00:26:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:57,787 INFO L225 Difference]: With dead ends: 1451 [2021-12-07 00:26:57,787 INFO L226 Difference]: Without dead ends: 1178 [2021-12-07 00:26:57,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 348 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 84.6s TimeCoverageRelationStatistics Valid=472, Invalid=6229, Unknown=133, NotChecked=1176, Total=8010 [2021-12-07 00:26:57,789 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 451 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 3417 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 3919 SdHoareTripleChecker+Invalid, 9037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 3417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5340 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:57,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 3919 Invalid, 9037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 3417 Invalid, 0 Unknown, 5340 Unchecked, 1.8s Time] [2021-12-07 00:26:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-12-07 00:26:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1075. [2021-12-07 00:26:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 811 states have (on average 1.1738594327990135) internal successors, (952), 839 states have internal predecessors, (952), 148 states have call successors, (148), 70 states have call predecessors, (148), 115 states have return successors, (416), 168 states have call predecessors, (416), 145 states have call successors, (416) [2021-12-07 00:26:57,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1516 transitions. [2021-12-07 00:26:57,840 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1516 transitions. Word has length 305 [2021-12-07 00:26:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:57,841 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1516 transitions. [2021-12-07 00:26:57,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 47 states have (on average 3.702127659574468) internal successors, (174), 45 states have internal predecessors, (174), 22 states have call successors, (39), 9 states have call predecessors, (39), 18 states have return successors, (38), 20 states have call predecessors, (38), 22 states have call successors, (38) [2021-12-07 00:26:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1516 transitions. [2021-12-07 00:26:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-07 00:26:57,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:57,847 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 13, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:57,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-07 00:26:58,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-07 00:26:58,047 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash 585970457, now seen corresponding path program 1 times [2021-12-07 00:26:58,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:58,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039704310] [2021-12-07 00:26:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:58,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:58,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:26:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862855184] [2021-12-07 00:26:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:58,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:58,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:58,097 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:58,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-07 00:26:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:58,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 3421 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-07 00:26:58,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 327 proven. 206 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-07 00:26:59,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:27:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-12-07 00:27:00,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:27:00,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039704310] [2021-12-07 00:27:00,348 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:27:00,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862855184] [2021-12-07 00:27:00,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862855184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:27:00,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:27:00,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 37 [2021-12-07 00:27:00,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774983318] [2021-12-07 00:27:00,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:27:00,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 00:27:00,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:27:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 00:27:00,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:27:00,350 INFO L87 Difference]: Start difference. First operand 1075 states and 1516 transitions. Second operand has 37 states, 35 states have (on average 6.314285714285714) internal successors, (221), 37 states have internal predecessors, (221), 6 states have call successors, (43), 2 states have call predecessors, (43), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) [2021-12-07 00:27:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:27:02,726 INFO L93 Difference]: Finished difference Result 1635 states and 2415 transitions. [2021-12-07 00:27:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 00:27:02,727 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 6.314285714285714) internal successors, (221), 37 states have internal predecessors, (221), 6 states have call successors, (43), 2 states have call predecessors, (43), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) Word has length 316 [2021-12-07 00:27:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:27:02,732 INFO L225 Difference]: With dead ends: 1635 [2021-12-07 00:27:02,732 INFO L226 Difference]: Without dead ends: 1068 [2021-12-07 00:27:02,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 595 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 00:27:02,735 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 97 mSDsluCounter, 5229 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 5436 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:02,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 5436 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 00:27:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-12-07 00:27:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1011. [2021-12-07 00:27:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 760 states have (on average 1.168421052631579) internal successors, (888), 786 states have internal predecessors, (888), 143 states have call successors, (143), 68 states have call predecessors, (143), 107 states have return successors, (358), 159 states have call predecessors, (358), 140 states have call successors, (358) [2021-12-07 00:27:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1389 transitions. [2021-12-07 00:27:02,803 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1389 transitions. Word has length 316 [2021-12-07 00:27:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:27:02,803 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 1389 transitions. [2021-12-07 00:27:02,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 6.314285714285714) internal successors, (221), 37 states have internal predecessors, (221), 6 states have call successors, (43), 2 states have call predecessors, (43), 6 states have return successors, (45), 6 states have call predecessors, (45), 6 states have call successors, (45) [2021-12-07 00:27:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1389 transitions. [2021-12-07 00:27:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-07 00:27:02,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:02,811 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:27:02,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-07 00:27:03,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-07 00:27:03,012 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:27:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash 935090339, now seen corresponding path program 1 times [2021-12-07 00:27:03,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:27:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085704507] [2021-12-07 00:27:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:03,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:27:03,069 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:27:03,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432452229] [2021-12-07 00:27:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:03,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:27:03,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:27:03,070 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:27:03,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-07 00:27:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 3557 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-07 00:27:03,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:27:03,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:27:03,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:27:03,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-12-07 00:27:03,930 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 00:27:03,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 00:27:04,203 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-07 00:27:04,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 00:27:04,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:27:04,208 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 [2021-12-07 00:27:06,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:27:06,288 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 [2021-12-07 00:27:06,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:27:06,291 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 [2021-12-07 00:27:08,480 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_11981 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_11981))) (exists ((v_ArrVal_11980 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_11980)))) is different from true [2021-12-07 00:27:10,799 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11982 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_11983 Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_11983))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_11982)) |c_#memory_$Pointer$.base|))) is different from true [2021-12-07 00:27:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 146 proven. 22 refuted. 0 times theorem prover too weak. 467 trivial. 3 not checked. [2021-12-07 00:27:27,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:27:28,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:27:28,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085704507] [2021-12-07 00:27:28,251 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:27:28,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432452229] [2021-12-07 00:27:28,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432452229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:27:28,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:27:28,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-12-07 00:27:28,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311472260] [2021-12-07 00:27:28,252 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:27:28,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 00:27:28,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:27:28,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 00:27:28,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1065, Unknown=28, NotChecked=134, Total=1332 [2021-12-07 00:27:28,252 INFO L87 Difference]: Start difference. First operand 1011 states and 1389 transitions. Second operand has 36 states, 32 states have (on average 4.28125) internal successors, (137), 32 states have internal predecessors, (137), 14 states have call successors, (32), 7 states have call predecessors, (32), 12 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) [2021-12-07 00:27:35,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-12-07 00:27:35,270 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-07 00:27:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 00:27:35,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 450 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=198, Invalid=2028, Unknown=38, NotChecked=186, Total=2450 [2021-12-07 00:27:35,272 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 39 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 783 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:35,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 467 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 396 Invalid, 0 Unknown, 783 Unchecked, 0.3s Time] [2021-12-07 00:27:35,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-07 00:27:35,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:27:35,474 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:192) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:159) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 56 more [2021-12-07 00:27:35,485 INFO L158 Benchmark]: Toolchain (without parser) took 815853.26ms. Allocated memory was 102.8MB in the beginning and 318.8MB in the end (delta: 216.0MB). Free memory was 63.1MB in the beginning and 115.5MB in the end (delta: -52.4MB). Peak memory consumption was 164.7MB. Max. memory is 16.1GB. [2021-12-07 00:27:35,485 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 73.4MB. Free memory was 52.7MB in the beginning and 52.6MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:27:35,486 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1522.08ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 63.1MB in the beginning and 73.8MB in the end (delta: -10.7MB). Peak memory consumption was 37.8MB. Max. memory is 16.1GB. [2021-12-07 00:27:35,486 INFO L158 Benchmark]: Boogie Procedure Inliner took 116.73ms. Allocated memory is still 123.7MB. Free memory was 73.8MB in the beginning and 65.2MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-07 00:27:35,487 INFO L158 Benchmark]: Boogie Preprocessor took 73.69ms. Allocated memory is still 123.7MB. Free memory was 65.2MB in the beginning and 59.1MB in the end (delta: 6.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-07 00:27:35,487 INFO L158 Benchmark]: RCFGBuilder took 975.92ms. Allocated memory is still 123.7MB. Free memory was 59.1MB in the beginning and 64.9MB in the end (delta: -5.8MB). Peak memory consumption was 20.0MB. Max. memory is 16.1GB. [2021-12-07 00:27:35,488 INFO L158 Benchmark]: TraceAbstraction took 813160.27ms. Allocated memory was 123.7MB in the beginning and 318.8MB in the end (delta: 195.0MB). Free memory was 64.3MB in the beginning and 115.5MB in the end (delta: -51.3MB). Peak memory consumption was 144.8MB. Max. memory is 16.1GB. [2021-12-07 00:27:35,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 73.4MB. Free memory was 52.7MB in the beginning and 52.6MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1522.08ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 63.1MB in the beginning and 73.8MB in the end (delta: -10.7MB). Peak memory consumption was 37.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 116.73ms. Allocated memory is still 123.7MB. Free memory was 73.8MB in the beginning and 65.2MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.69ms. Allocated memory is still 123.7MB. Free memory was 65.2MB in the beginning and 59.1MB in the end (delta: 6.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 975.92ms. Allocated memory is still 123.7MB. Free memory was 59.1MB in the beginning and 64.9MB in the end (delta: -5.8MB). Peak memory consumption was 20.0MB. Max. memory is 16.1GB. * TraceAbstraction took 813160.27ms. Allocated memory was 123.7MB in the beginning and 318.8MB in the end (delta: 195.0MB). Free memory was 64.3MB in the beginning and 115.5MB in the end (delta: -51.3MB). Peak memory consumption was 144.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:27:36,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:27:36,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:27:36,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:27:36,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:27:36,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:27:36,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:27:36,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:27:36,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:27:36,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:27:36,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:27:36,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:27:36,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:27:36,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:27:36,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:27:36,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:27:36,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:27:36,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:27:36,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:27:36,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:27:36,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:27:36,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:27:36,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:27:36,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:27:36,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:27:36,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:27:36,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:27:36,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:27:36,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:27:36,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:27:36,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:27:36,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:27:36,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:27:36,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:27:36,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:27:36,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:27:36,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:27:36,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:27:36,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:27:36,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:27:36,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:27:36,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-12-07 00:27:36,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:27:36,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:27:36,921 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:27:36,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:27:36,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:27:36,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:27:36,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:27:36,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:27:36,923 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:27:36,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:27:36,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:27:36,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:27:36,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:27:36,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:27:36,924 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 00:27:36,924 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 00:27:36,924 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 00:27:36,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:27:36,925 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:27:36,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:27:36,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:27:36,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:27:36,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:27:36,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:27:36,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:27:36,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:27:36,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:27:36,926 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 00:27:36,926 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 00:27:36,926 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:27:36,926 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:27:36,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:27:36,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:27:36,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 00:27:36,927 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-12-07 00:27:37,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:27:37,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:27:37,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:27:37,183 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:27:37,184 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:27:37,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-12-07 00:27:37,227 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data/938bd7255/c0d0e9cbd63244af9f33456b166e1f16/FLAG15035aa33 [2021-12-07 00:27:37,772 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:27:37,772 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-12-07 00:27:37,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data/938bd7255/c0d0e9cbd63244af9f33456b166e1f16/FLAG15035aa33 [2021-12-07 00:27:38,266 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/data/938bd7255/c0d0e9cbd63244af9f33456b166e1f16 [2021-12-07 00:27:38,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:27:38,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:27:38,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:27:38,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:27:38,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:27:38,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:27:38" (1/1) ... [2021-12-07 00:27:38,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0d81e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:38, skipping insertion in model container [2021-12-07 00:27:38,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:27:38" (1/1) ... [2021-12-07 00:27:38,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:27:38,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:27:38,535 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-12-07 00:27:38,540 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-12-07 00:27:39,075 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 00:27:39,127 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,127 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,128 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,128 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,129 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,140 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,140 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,141 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,142 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,420 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 00:27:39,421 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 00:27:39,422 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 00:27:39,428 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 00:27:39,429 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 00:27:39,430 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 00:27:39,430 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 00:27:39,431 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 00:27:39,432 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 00:27:39,432 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 00:27:39,568 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:27:39,649 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-07 00:27:39,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:27:39,710 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-12-07 00:27:39,711 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-12-07 00:27:39,731 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 00:27:39,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,742 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,746 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,747 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,771 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 00:27:39,772 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 00:27:39,772 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 00:27:39,773 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 00:27:39,774 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 00:27:39,774 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 00:27:39,774 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 00:27:39,775 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 00:27:39,775 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 00:27:39,775 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 00:27:39,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:27:39,830 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:27:39,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-12-07 00:27:39,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-12-07 00:27:39,860 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-07 00:27:39,868 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,868 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,868 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,869 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,869 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,873 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,873 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,874 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,874 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,897 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-07 00:27:39,898 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-07 00:27:39,898 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-07 00:27:39,899 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-07 00:27:39,900 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-07 00:27:39,900 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-07 00:27:39,900 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-07 00:27:39,900 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-07 00:27:39,901 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-07 00:27:39,901 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-07 00:27:39,919 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,919 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-07 00:27:39,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:27:40,115 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:27:40,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40 WrapperNode [2021-12-07 00:27:40,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:27:40,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:27:40,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:27:40,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:27:40,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,224 INFO L137 Inliner]: procedures = 709, calls = 1497, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 597 [2021-12-07 00:27:40,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:27:40,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:27:40,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:27:40,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:27:40,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:27:40,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:27:40,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:27:40,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:27:40,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (1/1) ... [2021-12-07 00:27:40,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:27:40,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:27:40,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:27:40,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:27:40,344 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-07 00:27:40,345 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-07 00:27:40,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:27:40,345 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-12-07 00:27:40,345 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-12-07 00:27:40,345 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-07 00:27:40,345 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-07 00:27:40,345 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-07 00:27:40,345 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-07 00:27:40,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 00:27:40,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-07 00:27:40,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-12-07 00:27:40,345 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-07 00:27:40,345 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 00:27:40,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:27:40,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2021-12-07 00:27:40,346 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-07 00:27:40,346 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-07 00:27:40,346 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-07 00:27:40,347 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-07 00:27:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-12-07 00:27:40,347 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-12-07 00:27:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-12-07 00:27:40,347 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-12-07 00:27:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 00:27:40,347 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 00:27:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:27:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 00:27:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-07 00:27:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-07 00:27:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 00:27:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-07 00:27:40,348 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-07 00:27:40,348 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-07 00:27:40,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-07 00:27:40,348 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-07 00:27:40,348 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-07 00:27:40,348 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-07 00:27:40,348 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-07 00:27:40,348 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-12-07 00:27:40,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-12-07 00:27:40,531 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:27:40,533 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:27:41,670 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:27:41,682 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:27:41,682 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-07 00:27:41,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:27:41 BoogieIcfgContainer [2021-12-07 00:27:41,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:27:41,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:27:41,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:27:41,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:27:41,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:27:38" (1/3) ... [2021-12-07 00:27:41,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d72bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:27:41, skipping insertion in model container [2021-12-07 00:27:41,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:27:40" (2/3) ... [2021-12-07 00:27:41,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d72bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:27:41, skipping insertion in model container [2021-12-07 00:27:41,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:27:41" (3/3) ... [2021-12-07 00:27:41,691 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-12-07 00:27:41,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:27:41,697 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:27:41,737 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:27:41,742 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:27:41,742 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:27:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-07 00:27:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-07 00:27:41,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:41,768 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:27:41,768 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:27:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash 432166812, now seen corresponding path program 1 times [2021-12-07 00:27:41,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:27:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336498256] [2021-12-07 00:27:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:41,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:27:41,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:27:41,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:27:41,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 00:27:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:42,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 00:27:42,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:27:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 00:27:42,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:27:42,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:27:42,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336498256] [2021-12-07 00:27:42,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336498256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:27:42,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:27:42,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:27:42,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83921796] [2021-12-07 00:27:42,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:27:42,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:27:42,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:27:42,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:27:42,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:27:42,503 INFO L87 Difference]: Start difference. First operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-07 00:27:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:27:42,543 INFO L93 Difference]: Finished difference Result 319 states and 435 transitions. [2021-12-07 00:27:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:27:42,545 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2021-12-07 00:27:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:27:42,555 INFO L225 Difference]: With dead ends: 319 [2021-12-07 00:27:42,555 INFO L226 Difference]: Without dead ends: 160 [2021-12-07 00:27:42,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:27:42,561 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:42,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:27:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-07 00:27:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-07 00:27:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-07 00:27:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-12-07 00:27:42,601 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 105 [2021-12-07 00:27:42,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:27:42,602 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-12-07 00:27:42,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-07 00:27:42,602 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-12-07 00:27:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 00:27:42,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:42,607 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:27:42,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:27:42,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:27:42,809 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:27:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:42,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672400, now seen corresponding path program 1 times [2021-12-07 00:27:42,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:27:42,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734747261] [2021-12-07 00:27:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:42,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:27:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:27:42,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:27:42,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 00:27:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:27:43,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:27:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:27:43,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:27:43,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:27:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734747261] [2021-12-07 00:27:43,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734747261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:27:43,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:27:43,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:27:43,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309516691] [2021-12-07 00:27:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:27:43,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:27:43,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:27:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:27:43,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:27:43,706 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:27:43,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:27:43,778 INFO L93 Difference]: Finished difference Result 256 states and 319 transitions. [2021-12-07 00:27:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:27:43,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 122 [2021-12-07 00:27:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:27:43,781 INFO L225 Difference]: With dead ends: 256 [2021-12-07 00:27:43,781 INFO L226 Difference]: Without dead ends: 160 [2021-12-07 00:27:43,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:27:43,783 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 30 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:43,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 727 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:27:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-07 00:27:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-07 00:27:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-07 00:27:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 200 transitions. [2021-12-07 00:27:43,797 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 200 transitions. Word has length 122 [2021-12-07 00:27:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:27:43,797 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 200 transitions. [2021-12-07 00:27:43,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-07 00:27:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 200 transitions. [2021-12-07 00:27:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-07 00:27:43,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:43,800 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:27:43,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 00:27:44,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:27:44,001 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:27:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:44,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2103837312, now seen corresponding path program 1 times [2021-12-07 00:27:44,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:27:44,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034549349] [2021-12-07 00:27:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:44,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:27:44,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:27:44,004 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:27:44,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 00:27:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:27:44,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:27:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:27:44,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:27:44,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:27:44,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034549349] [2021-12-07 00:27:44,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034549349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:27:44,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:27:44,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:27:44,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610924044] [2021-12-07 00:27:44,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:27:44,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:27:44,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:27:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:27:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:27:44,741 INFO L87 Difference]: Start difference. First operand 160 states and 200 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-07 00:27:45,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:27:45,029 INFO L93 Difference]: Finished difference Result 275 states and 348 transitions. [2021-12-07 00:27:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:27:45,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 130 [2021-12-07 00:27:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:27:45,034 INFO L225 Difference]: With dead ends: 275 [2021-12-07 00:27:45,034 INFO L226 Difference]: Without dead ends: 162 [2021-12-07 00:27:45,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:27:45,035 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 81 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:45,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1049 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:27:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-07 00:27:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-07 00:27:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 111 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-12-07 00:27:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2021-12-07 00:27:45,053 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 130 [2021-12-07 00:27:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:27:45,054 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2021-12-07 00:27:45,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-07 00:27:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2021-12-07 00:27:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-07 00:27:45,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:45,058 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:27:45,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 00:27:45,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:27:45,258 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:27:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash -209170488, now seen corresponding path program 1 times [2021-12-07 00:27:45,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:27:45,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990925519] [2021-12-07 00:27:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:45,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:27:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:27:45,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:27:45,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 00:27:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:45,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:27:45,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:27:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:27:46,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:27:46,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:27:46,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990925519] [2021-12-07 00:27:46,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990925519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:27:46,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:27:46,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:27:46,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827239171] [2021-12-07 00:27:46,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:27:46,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:27:46,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:27:46,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:27:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:27:46,126 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-07 00:27:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:27:46,277 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2021-12-07 00:27:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:27:46,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2021-12-07 00:27:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:27:46,279 INFO L225 Difference]: With dead ends: 261 [2021-12-07 00:27:46,279 INFO L226 Difference]: Without dead ends: 162 [2021-12-07 00:27:46,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:27:46,280 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 52 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:46,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 875 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:27:46,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-07 00:27:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-07 00:27:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-12-07 00:27:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2021-12-07 00:27:46,295 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 145 [2021-12-07 00:27:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:27:46,296 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2021-12-07 00:27:46,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-12-07 00:27:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2021-12-07 00:27:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-07 00:27:46,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:46,299 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:27:46,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 00:27:46,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:27:46,501 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:27:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1337604585, now seen corresponding path program 1 times [2021-12-07 00:27:46,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:27:46,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672192096] [2021-12-07 00:27:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:46,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:27:46,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:27:46,511 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:27:46,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 00:27:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1525 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:27:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:27:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-07 00:27:47,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:27:47,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:27:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672192096] [2021-12-07 00:27:47,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672192096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:27:47,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:27:47,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:27:47,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885411445] [2021-12-07 00:27:47,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:27:47,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:27:47,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:27:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:27:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:27:47,601 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-07 00:27:47,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:27:47,991 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2021-12-07 00:27:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:27:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 161 [2021-12-07 00:27:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:27:47,993 INFO L225 Difference]: With dead ends: 274 [2021-12-07 00:27:47,993 INFO L226 Difference]: Without dead ends: 162 [2021-12-07 00:27:47,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:27:47,994 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 103 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:47,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1175 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:27:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-07 00:27:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-12-07 00:27:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-12-07 00:27:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2021-12-07 00:27:48,002 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 161 [2021-12-07 00:27:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:27:48,002 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2021-12-07 00:27:48,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-12-07 00:27:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2021-12-07 00:27:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-07 00:27:48,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:48,005 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:27:48,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 00:27:48,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:27:48,206 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:27:48,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:48,207 INFO L85 PathProgramCache]: Analyzing trace with hash 996052163, now seen corresponding path program 1 times [2021-12-07 00:27:48,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:27:48,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562566310] [2021-12-07 00:27:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:48,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:27:48,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:27:48,216 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:27:48,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6408e2ff-82af-4675-8a7e-22814d01c086/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 00:27:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:27:49,189 INFO L286 TraceCheckSpWp]: Computing forward predicates...