./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R --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 f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:04:01,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:04:01,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:04:01,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:04:01,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:04:01,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:04:01,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:04:01,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:04:01,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:04:01,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:04:01,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:04:01,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:04:01,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:04:01,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:04:01,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:04:01,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:04:01,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:04:01,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:04:01,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:04:01,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:04:01,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:04:01,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:04:01,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:04:01,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:04:01,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:04:01,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:04:01,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:04:01,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:04:01,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:04:01,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:04:01,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:04:01,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:04:01,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:04:01,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:04:01,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:04:01,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:04:01,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:04:01,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:04:01,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:04:01,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:04:01,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:04:01,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-25 18:04:01,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:04:01,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:04:01,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:04:01,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:04:01,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:04:01,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:04:01,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:04:01,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:04:01,286 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:04:01,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:04:01,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:04:01,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:04:01,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:04:01,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:04:01,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:04:01,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:04:01,289 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:04:01,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:04:01,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:04:01,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:04:01,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:04:01,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:04:01,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:04:01,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:04:01,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:04:01,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:04:01,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:04:01,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:04:01,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:04:01,292 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:04:01,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:04:01,293 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4db5fb03820aea666082345ea177387bf1c218ce33dad19402cb646ed5abf58 [2022-11-25 18:04:01,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:04:01,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:04:01,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:04:01,665 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:04:01,666 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:04:01,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2022-11-25 18:04:04,745 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:04:05,316 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:04:05,317 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i [2022-11-25 18:04:05,349 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/data/c4c490feb/f4c1a1d6dac9486097856b35628222f6/FLAGd5c2a2145 [2022-11-25 18:04:05,365 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/data/c4c490feb/f4c1a1d6dac9486097856b35628222f6 [2022-11-25 18:04:05,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:04:05,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:04:05,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:04:05,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:04:05,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:04:05,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:04:05" (1/1) ... [2022-11-25 18:04:05,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1936c66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:05, skipping insertion in model container [2022-11-25 18:04:05,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:04:05" (1/1) ... [2022-11-25 18:04:05,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:04:05,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:04:05,770 WARN L237 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_6260d0fb-8320-4999-ab05-af3bc1407a5e/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4505,4518] [2022-11-25 18:04:05,780 WARN L237 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_6260d0fb-8320-4999-ab05-af3bc1407a5e/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4565,4578] [2022-11-25 18:04:06,901 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 18:04:06,986 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:07,002 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:07,010 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,011 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,012 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,013 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,014 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,020 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:07,030 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,031 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,034 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,035 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,141 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:04:07,142 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:04:07,143 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:04:07,151 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 18:04:07,155 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 18:04:07,156 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 18:04:07,348 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:07,586 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 18:04:07,590 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 18:04:07,592 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 18:04:07,593 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 18:04:07,608 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 18:04:07,612 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 18:04:07,616 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 18:04:07,617 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 18:04:07,618 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 18:04:07,620 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 18:04:07,627 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 18:04:07,855 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:07,857 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:07,859 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,859 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:07,889 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:07,912 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 18:04:07,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:04:07,967 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:04:07,995 WARN L237 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_6260d0fb-8320-4999-ab05-af3bc1407a5e/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4505,4518] [2022-11-25 18:04:07,996 WARN L237 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_6260d0fb-8320-4999-ab05-af3bc1407a5e/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness-1.i[4565,4578] [2022-11-25 18:04:08,091 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 18:04:08,113 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:08,136 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:08,139 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,150 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,151 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,151 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,152 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,169 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:08,173 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,174 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,175 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,182 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,188 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:04:08,190 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:04:08,191 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:04:08,195 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 18:04:08,198 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 18:04:08,198 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 18:04:08,202 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:08,236 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 18:04:08,237 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 18:04:08,239 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 18:04:08,240 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 18:04:08,241 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 18:04:08,242 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 18:04:08,242 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 18:04:08,243 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 18:04:08,243 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 18:04:08,244 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 18:04:08,245 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 18:04:08,301 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:08,309 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:08,317 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,318 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:04:08,328 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 18:04:08,347 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 18:04:08,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:04:08,617 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:04:08,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08 WrapperNode [2022-11-25 18:04:08,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:04:08,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:04:08,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:04:08,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:04:08,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,743 INFO L138 Inliner]: procedures = 689, calls = 1516, calls flagged for inlining = 52, calls inlined = 9, statements flattened = 741 [2022-11-25 18:04:08,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:04:08,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:04:08,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:04:08,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:04:08,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,800 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:04:08,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:04:08,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:04:08,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:04:08,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (1/1) ... [2022-11-25 18:04:08,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:04:08,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:08,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:04:08,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:04:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-25 18:04:08,901 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-25 18:04:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:04:08,901 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-11-25 18:04:08,902 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-11-25 18:04:08,902 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-25 18:04:08,903 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-25 18:04:08,903 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-11-25 18:04:08,903 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-11-25 18:04:08,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:04:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-25 18:04:08,904 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-25 18:04:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 18:04:08,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 18:04:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:04:08,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:04:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 18:04:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:04:08,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:04:08,905 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 18:04:08,906 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 18:04:08,906 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2022-11-25 18:04:08,906 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2022-11-25 18:04:08,906 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-11-25 18:04:08,906 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-11-25 18:04:08,906 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-11-25 18:04:08,907 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-11-25 18:04:08,907 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2022-11-25 18:04:08,907 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2022-11-25 18:04:08,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 18:04:08,908 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 18:04:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:04:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 18:04:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 18:04:08,909 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-25 18:04:08,909 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-25 18:04:08,909 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-11-25 18:04:08,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-11-25 18:04:08,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:04:08,909 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-11-25 18:04:08,910 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-11-25 18:04:08,911 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-11-25 18:04:08,915 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-11-25 18:04:08,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:04:09,313 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:04:09,316 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:04:10,468 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:04:10,485 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:04:10,486 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 18:04:10,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:04:10 BoogieIcfgContainer [2022-11-25 18:04:10,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:04:10,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:04:10,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:04:10,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:04:10,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:04:05" (1/3) ... [2022-11-25 18:04:10,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffaae4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:04:10, skipping insertion in model container [2022-11-25 18:04:10,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:08" (2/3) ... [2022-11-25 18:04:10,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffaae4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:04:10, skipping insertion in model container [2022-11-25 18:04:10,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:04:10" (3/3) ... [2022-11-25 18:04:10,503 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness-1.i [2022-11-25 18:04:10,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:04:10,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:04:10,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:04:10,618 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b0a41f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:04:10,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 18:04:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 133 states have (on average 1.255639097744361) internal successors, (167), 133 states have internal predecessors, (167), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-11-25 18:04:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-25 18:04:10,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:10,646 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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] [2022-11-25 18:04:10,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:10,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1293047729, now seen corresponding path program 1 times [2022-11-25 18:04:10,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:10,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864825243] [2022-11-25 18:04:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:10,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864825243] [2022-11-25 18:04:11,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 18:04:11,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725364191] [2022-11-25 18:04:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:11,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:11,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:11,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:11,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:04:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:11,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2210 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 18:04:11,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-25 18:04:11,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:11,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725364191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:11,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:11,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:04:11,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598863112] [2022-11-25 18:04:11,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:11,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:04:11,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:04:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:04:12,042 INFO L87 Difference]: Start difference. First operand has 205 states, 133 states have (on average 1.255639097744361) internal successors, (167), 133 states have internal predecessors, (167), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 18:04:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:12,113 INFO L93 Difference]: Finished difference Result 401 states and 585 transitions. [2022-11-25 18:04:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:04:12,115 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 112 [2022-11-25 18:04:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:12,125 INFO L225 Difference]: With dead ends: 401 [2022-11-25 18:04:12,125 INFO L226 Difference]: Without dead ends: 198 [2022-11-25 18:04:12,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:04:12,134 INFO L413 NwaCegarLoop]: 271 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, 271 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 [2022-11-25 18:04:12,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:04:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-25 18:04:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-25 18:04:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 125 states have (on average 1.224) internal successors, (153), 127 states have internal predecessors, (153), 56 states have call successors, (56), 16 states have call predecessors, (56), 16 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-25 18:04:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 263 transitions. [2022-11-25 18:04:12,191 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 263 transitions. Word has length 112 [2022-11-25 18:04:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:12,192 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 263 transitions. [2022-11-25 18:04:12,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 18:04:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 263 transitions. [2022-11-25 18:04:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-25 18:04:12,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:12,196 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-11-25 18:04:12,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:12,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 18:04:12,406 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:12,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1403140028, now seen corresponding path program 1 times [2022-11-25 18:04:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:12,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567112573] [2022-11-25 18:04:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:12,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277091834] [2022-11-25 18:04:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:12,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:12,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:12,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:12,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:04:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:13,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:04:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-25 18:04:13,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:13,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:13,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567112573] [2022-11-25 18:04:13,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:04:13,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277091834] [2022-11-25 18:04:13,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277091834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:13,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:13,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:04:13,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835690971] [2022-11-25 18:04:13,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:13,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:04:13,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:13,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:04:13,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:04:13,244 INFO L87 Difference]: Start difference. First operand 198 states and 263 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-25 18:04:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:13,365 INFO L93 Difference]: Finished difference Result 302 states and 404 transitions. [2022-11-25 18:04:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:04:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 146 [2022-11-25 18:04:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:13,375 INFO L225 Difference]: With dead ends: 302 [2022-11-25 18:04:13,379 INFO L226 Difference]: Without dead ends: 203 [2022-11-25 18:04:13,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:04:13,383 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 2 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:04:13,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1032 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:04:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-25 18:04:13,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-11-25 18:04:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 129 states have (on average 1.2170542635658914) internal successors, (157), 131 states have internal predecessors, (157), 56 states have call successors, (56), 16 states have call predecessors, (56), 17 states have return successors, (57), 55 states have call predecessors, (57), 54 states have call successors, (57) [2022-11-25 18:04:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 270 transitions. [2022-11-25 18:04:13,423 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 270 transitions. Word has length 146 [2022-11-25 18:04:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:13,425 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 270 transitions. [2022-11-25 18:04:13,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-25 18:04:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 270 transitions. [2022-11-25 18:04:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-25 18:04:13,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:13,436 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-11-25 18:04:13,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:13,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:13,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 494695836, now seen corresponding path program 1 times [2022-11-25 18:04:13,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:13,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759082318] [2022-11-25 18:04:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:13,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:13,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282468559] [2022-11-25 18:04:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:13,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:13,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:13,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:13,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:04:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:14,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 2384 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:04:14,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2022-11-25 18:04:14,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-11-25 18:04:14,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:14,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759082318] [2022-11-25 18:04:14,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:04:14,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282468559] [2022-11-25 18:04:14,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282468559] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:04:14,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:04:14,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-11-25 18:04:14,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558258865] [2022-11-25 18:04:14,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:14,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:04:14,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:04:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:04:14,760 INFO L87 Difference]: Start difference. First operand 203 states and 270 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-25 18:04:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:14,838 INFO L93 Difference]: Finished difference Result 211 states and 278 transitions. [2022-11-25 18:04:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:04:14,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 147 [2022-11-25 18:04:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:14,841 INFO L225 Difference]: With dead ends: 211 [2022-11-25 18:04:14,841 INFO L226 Difference]: Without dead ends: 209 [2022-11-25 18:04:14,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:04:14,842 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 4 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:04:14,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1029 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:04:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-25 18:04:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-11-25 18:04:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 132 states have (on average 1.2121212121212122) internal successors, (160), 135 states have internal predecessors, (160), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2022-11-25 18:04:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2022-11-25 18:04:14,864 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 147 [2022-11-25 18:04:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:14,865 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2022-11-25 18:04:14,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-25 18:04:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2022-11-25 18:04:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-25 18:04:14,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:14,871 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-11-25 18:04:14,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:15,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:15,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:15,082 INFO L85 PathProgramCache]: Analyzing trace with hash 496542878, now seen corresponding path program 1 times [2022-11-25 18:04:15,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:15,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543363889] [2022-11-25 18:04:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:15,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:15,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:15,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490399795] [2022-11-25 18:04:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:15,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:15,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:15,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:15,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:04:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:15,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 2389 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:04:15,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-11-25 18:04:15,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:15,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:15,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543363889] [2022-11-25 18:04:15,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:04:15,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490399795] [2022-11-25 18:04:15,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490399795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:15,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:15,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 18:04:15,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705509189] [2022-11-25 18:04:15,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:15,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:04:15,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:04:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:04:15,772 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2022-11-25 18:04:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:15,863 INFO L93 Difference]: Finished difference Result 401 states and 523 transitions. [2022-11-25 18:04:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:04:15,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 147 [2022-11-25 18:04:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:15,866 INFO L225 Difference]: With dead ends: 401 [2022-11-25 18:04:15,866 INFO L226 Difference]: Without dead ends: 208 [2022-11-25 18:04:15,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:04:15,868 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 13 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:04:15,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1257 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:04:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-25 18:04:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-11-25 18:04:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 135 states have internal predecessors, (159), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2022-11-25 18:04:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 274 transitions. [2022-11-25 18:04:15,885 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 274 transitions. Word has length 147 [2022-11-25 18:04:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:15,886 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 274 transitions. [2022-11-25 18:04:15,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 4 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2022-11-25 18:04:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 274 transitions. [2022-11-25 18:04:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-25 18:04:15,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:15,889 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 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] [2022-11-25 18:04:15,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:16,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:16,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:16,100 INFO L85 PathProgramCache]: Analyzing trace with hash -50417486, now seen corresponding path program 1 times [2022-11-25 18:04:16,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:16,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280400231] [2022-11-25 18:04:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:16,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:16,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:16,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712796505] [2022-11-25 18:04:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:16,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:16,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:16,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:16,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:04:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:16,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 2403 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:04:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-25 18:04:16,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:16,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:16,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280400231] [2022-11-25 18:04:16,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:04:16,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712796505] [2022-11-25 18:04:16,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712796505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:16,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:16,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:04:16,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050703610] [2022-11-25 18:04:16,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:16,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:04:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:04:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:04:16,777 INFO L87 Difference]: Start difference. First operand 208 states and 274 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-25 18:04:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:16,800 INFO L93 Difference]: Finished difference Result 397 states and 520 transitions. [2022-11-25 18:04:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:04:16,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 149 [2022-11-25 18:04:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:16,803 INFO L225 Difference]: With dead ends: 397 [2022-11-25 18:04:16,803 INFO L226 Difference]: Without dead ends: 210 [2022-11-25 18:04:16,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:04:16,804 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:04:16,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 516 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:04:16,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-25 18:04:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2022-11-25 18:04:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 133 states have (on average 1.2030075187969924) internal successors, (160), 136 states have internal predecessors, (160), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2022-11-25 18:04:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 275 transitions. [2022-11-25 18:04:16,818 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 275 transitions. Word has length 149 [2022-11-25 18:04:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:16,818 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 275 transitions. [2022-11-25 18:04:16,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-25 18:04:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 275 transitions. [2022-11-25 18:04:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-25 18:04:16,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:16,820 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 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] [2022-11-25 18:04:16,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:17,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:17,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:17,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2024331122, now seen corresponding path program 1 times [2022-11-25 18:04:17,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:17,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573053134] [2022-11-25 18:04:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:17,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:17,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:17,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245342581] [2022-11-25 18:04:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:17,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:17,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:17,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:17,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:04:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:17,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 18:04:17,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-11-25 18:04:17,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-11-25 18:04:18,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:18,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573053134] [2022-11-25 18:04:18,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:04:18,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245342581] [2022-11-25 18:04:18,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245342581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:18,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:18,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-25 18:04:18,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277483100] [2022-11-25 18:04:18,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:18,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:04:18,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:18,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:04:18,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:04:18,403 INFO L87 Difference]: Start difference. First operand 209 states and 275 transitions. Second operand has 15 states, 13 states have (on average 5.769230769230769) internal successors, (75), 15 states have internal predecessors, (75), 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) [2022-11-25 18:04:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:18,623 INFO L93 Difference]: Finished difference Result 406 states and 527 transitions. [2022-11-25 18:04:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:04:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 5.769230769230769) internal successors, (75), 15 states have internal predecessors, (75), 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 153 [2022-11-25 18:04:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:18,627 INFO L225 Difference]: With dead ends: 406 [2022-11-25 18:04:18,627 INFO L226 Difference]: Without dead ends: 212 [2022-11-25 18:04:18,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:04:18,630 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 18 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:04:18,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1762 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:04:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-25 18:04:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-11-25 18:04:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 135 states have (on average 1.2) internal successors, (162), 138 states have internal predecessors, (162), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2022-11-25 18:04:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2022-11-25 18:04:18,650 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 153 [2022-11-25 18:04:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:18,651 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2022-11-25 18:04:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 5.769230769230769) internal successors, (75), 15 states have internal predecessors, (75), 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) [2022-11-25 18:04:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2022-11-25 18:04:18,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-25 18:04:18,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:18,654 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 3, 3, 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] [2022-11-25 18:04:18,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:18,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:18,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1553173810, now seen corresponding path program 2 times [2022-11-25 18:04:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:18,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340758874] [2022-11-25 18:04:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:18,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:18,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974927893] [2022-11-25 18:04:18,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:04:18,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:18,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:18,967 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:18,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:04:19,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:04:19,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:04:19,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:04:19,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-25 18:04:19,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-25 18:04:20,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340758874] [2022-11-25 18:04:20,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:04:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974927893] [2022-11-25 18:04:20,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974927893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:20,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:20,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-11-25 18:04:20,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119868317] [2022-11-25 18:04:20,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:20,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:04:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:04:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:04:20,242 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 17 states, 15 states have (on average 5.8) internal successors, (87), 17 states have internal predecessors, (87), 6 states have call successors, (30), 2 states have call predecessors, (30), 7 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-25 18:04:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:20,552 INFO L93 Difference]: Finished difference Result 410 states and 531 transitions. [2022-11-25 18:04:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:04:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.8) internal successors, (87), 17 states have internal predecessors, (87), 6 states have call successors, (30), 2 states have call predecessors, (30), 7 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 157 [2022-11-25 18:04:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:20,555 INFO L225 Difference]: With dead ends: 410 [2022-11-25 18:04:20,555 INFO L226 Difference]: Without dead ends: 214 [2022-11-25 18:04:20,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:04:20,556 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 24 mSDsluCounter, 2495 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:04:20,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2748 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:04:20,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-25 18:04:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-11-25 18:04:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 137 states have (on average 1.197080291970803) internal successors, (164), 140 states have internal predecessors, (164), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2022-11-25 18:04:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 279 transitions. [2022-11-25 18:04:20,567 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 279 transitions. Word has length 157 [2022-11-25 18:04:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:20,567 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 279 transitions. [2022-11-25 18:04:20,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.8) internal successors, (87), 17 states have internal predecessors, (87), 6 states have call successors, (30), 2 states have call predecessors, (30), 7 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-25 18:04:20,568 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 279 transitions. [2022-11-25 18:04:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-25 18:04:20,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:20,570 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 3, 3, 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] [2022-11-25 18:04:20,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:20,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:20,791 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:20,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1663013362, now seen corresponding path program 3 times [2022-11-25 18:04:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:20,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304424571] [2022-11-25 18:04:20,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:20,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:20,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:20,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780313456] [2022-11-25 18:04:20,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:04:20,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:20,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:20,889 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:20,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:04:23,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 18:04:23,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:04:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 2105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:04:23,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-11-25 18:04:23,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-11-25 18:04:23,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:23,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304424571] [2022-11-25 18:04:23,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:04:23,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780313456] [2022-11-25 18:04:23,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780313456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:23,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:23,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-25 18:04:23,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746963967] [2022-11-25 18:04:23,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:23,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:04:23,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:04:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:04:23,929 INFO L87 Difference]: Start difference. First operand 213 states and 279 transitions. Second operand has 17 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 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) [2022-11-25 18:04:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:24,160 INFO L93 Difference]: Finished difference Result 414 states and 535 transitions. [2022-11-25 18:04:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:04:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 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 161 [2022-11-25 18:04:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:24,163 INFO L225 Difference]: With dead ends: 414 [2022-11-25 18:04:24,163 INFO L226 Difference]: Without dead ends: 216 [2022-11-25 18:04:24,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-11-25 18:04:24,166 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 23 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:04:24,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2012 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:04:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-25 18:04:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2022-11-25 18:04:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 142 states have internal predecessors, (166), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2022-11-25 18:04:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 281 transitions. [2022-11-25 18:04:24,181 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 281 transitions. Word has length 161 [2022-11-25 18:04:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:24,181 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 281 transitions. [2022-11-25 18:04:24,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.533333333333333) internal successors, (83), 17 states have internal predecessors, (83), 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) [2022-11-25 18:04:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 281 transitions. [2022-11-25 18:04:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-25 18:04:24,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:24,185 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 8, 8, 3, 3, 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] [2022-11-25 18:04:24,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:24,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:24,402 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash -650271310, now seen corresponding path program 4 times [2022-11-25 18:04:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:24,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299340795] [2022-11-25 18:04:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:24,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:24,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:24,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563933915] [2022-11-25 18:04:24,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:04:24,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:24,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:24,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:24,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:04:25,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:04:25,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:04:25,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 2555 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:04:25,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 65 proven. 16 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-11-25 18:04:25,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-25 18:04:26,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:26,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299340795] [2022-11-25 18:04:26,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:04:26,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563933915] [2022-11-25 18:04:26,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563933915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:26,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:26,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-25 18:04:26,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018496786] [2022-11-25 18:04:26,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:26,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 18:04:26,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 18:04:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:04:26,237 INFO L87 Difference]: Start difference. First operand 215 states and 281 transitions. Second operand has 19 states, 17 states have (on average 5.117647058823529) internal successors, (87), 19 states have internal predecessors, (87), 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) [2022-11-25 18:04:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:26,595 INFO L93 Difference]: Finished difference Result 418 states and 539 transitions. [2022-11-25 18:04:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:04:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.117647058823529) internal successors, (87), 19 states have internal predecessors, (87), 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 165 [2022-11-25 18:04:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:26,598 INFO L225 Difference]: With dead ends: 418 [2022-11-25 18:04:26,598 INFO L226 Difference]: Without dead ends: 218 [2022-11-25 18:04:26,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:04:26,601 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 20 mSDsluCounter, 3259 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:04:26,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3514 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 18:04:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-25 18:04:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-11-25 18:04:26,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 144 states have internal predecessors, (168), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2022-11-25 18:04:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 283 transitions. [2022-11-25 18:04:26,613 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 283 transitions. Word has length 165 [2022-11-25 18:04:26,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:26,615 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 283 transitions. [2022-11-25 18:04:26,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.117647058823529) internal successors, (87), 19 states have internal predecessors, (87), 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) [2022-11-25 18:04:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 283 transitions. [2022-11-25 18:04:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-25 18:04:26,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:26,618 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 3, 3, 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] [2022-11-25 18:04:26,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:26,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:26,831 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:26,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1517193330, now seen corresponding path program 5 times [2022-11-25 18:04:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:26,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126679568] [2022-11-25 18:04:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:26,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:26,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:26,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509282940] [2022-11-25 18:04:26,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:04:26,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:26,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:26,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:26,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:04:27,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-25 18:04:27,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:04:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 18:04:27,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 215 proven. 25 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-25 18:04:28,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-25 18:04:28,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:04:28,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126679568] [2022-11-25 18:04:28,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:04:28,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509282940] [2022-11-25 18:04:28,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509282940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:28,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:28,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-11-25 18:04:28,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842751741] [2022-11-25 18:04:28,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:28,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:04:28,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:04:28,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:04:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:04:28,868 INFO L87 Difference]: Start difference. First operand 217 states and 283 transitions. Second operand has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 21 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-11-25 18:04:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:04:29,255 INFO L93 Difference]: Finished difference Result 422 states and 543 transitions. [2022-11-25 18:04:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:04:29,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 21 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 169 [2022-11-25 18:04:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:04:29,257 INFO L225 Difference]: With dead ends: 422 [2022-11-25 18:04:29,258 INFO L226 Difference]: Without dead ends: 220 [2022-11-25 18:04:29,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-11-25 18:04:29,259 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 15 mSDsluCounter, 3759 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4014 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 18:04:29,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 4014 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 18:04:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-25 18:04:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2022-11-25 18:04:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 146 states have internal predecessors, (170), 57 states have call successors, (57), 17 states have call predecessors, (57), 18 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2022-11-25 18:04:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 285 transitions. [2022-11-25 18:04:29,271 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 285 transitions. Word has length 169 [2022-11-25 18:04:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:04:29,271 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 285 transitions. [2022-11-25 18:04:29,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 21 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-11-25 18:04:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 285 transitions. [2022-11-25 18:04:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-25 18:04:29,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:04:29,274 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 3, 3, 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] [2022-11-25 18:04:29,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:29,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:04:29,483 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:04:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1933379022, now seen corresponding path program 6 times [2022-11-25 18:04:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:04:29,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251241901] [2022-11-25 18:04:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:29,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:04:29,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:04:29,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974810907] [2022-11-25 18:04:29,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:04:29,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:04:29,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:04:29,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:04:29,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6260d0fb-8320-4999-ab05-af3bc1407a5e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process