./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/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_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/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_68a9b01f-d1cb-455b-aff9-1029b8e67785/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 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 --- 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 16:43:49,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:43:49,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:43:49,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:43:49,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:43:49,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:43:49,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:43:49,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:43:49,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:43:49,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:43:49,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:43:49,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:43:49,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:43:49,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:43:49,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:43:49,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:43:49,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:43:49,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:43:49,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:43:49,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:43:49,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:43:49,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:43:49,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:43:49,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:43:49,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:43:49,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:43:49,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:43:49,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:43:49,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:43:49,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:43:49,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:43:49,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:43:49,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:43:49,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:43:49,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:43:49,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:43:49,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:43:49,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:43:49,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:43:49,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:43:49,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:43:49,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-25 16:43:49,631 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:43:49,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:43:49,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:43:49,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:43:49,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:43:49,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:43:49,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:43:49,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:43:49,635 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:43:49,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:43:49,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:43:49,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:43:49,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:43:49,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:43:49,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:43:49,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:43:49,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:43:49,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:43:49,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:43:49,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:43:49,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:43:49,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:43:49,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:43:49,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:43:49,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:43:49,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:43:49,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:43:49,641 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:43:49,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:43:49,642 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:43:49,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:43:49,643 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_68a9b01f-d1cb-455b-aff9-1029b8e67785/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 [2022-11-25 16:43:49,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:43:49,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:43:50,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:43:50,003 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:43:50,004 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:43:50,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-25 16:43:53,551 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:43:54,137 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:43:54,138 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-25 16:43:54,181 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/data/3f7dea1c6/d5c45b97feb14dc8be7d474dfcb13c96/FLAGce7bcdb2b [2022-11-25 16:43:54,209 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/data/3f7dea1c6/d5c45b97feb14dc8be7d474dfcb13c96 [2022-11-25 16:43:54,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:43:54,217 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:43:54,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:43:54,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:43:54,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:43:54,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:43:54" (1/1) ... [2022-11-25 16:43:54,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f50ba24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:54, skipping insertion in model container [2022-11-25 16:43:54,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:43:54" (1/1) ... [2022-11-25 16:43:54,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:43:54,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:43:55,193 WARN L623 FunctionHandler]: Unknown extern function debug_lockdep_rcu_enabled [2022-11-25 16:43:55,194 WARN L623 FunctionHandler]: Unknown extern function lockdep_rcu_dereference [2022-11-25 16:43:55,274 WARN L623 FunctionHandler]: Unknown extern function __get_free_pages [2022-11-25 16:43:55,284 WARN L623 FunctionHandler]: Unknown extern function kmem_cache_alloc_notrace [2022-11-25 16:43:55,314 WARN L623 FunctionHandler]: Unknown extern function debug_lockdep_rcu_enabled [2022-11-25 16:43:55,316 WARN L623 FunctionHandler]: Unknown extern function lockdep_rcu_dereference [2022-11-25 16:43:55,334 WARN L623 FunctionHandler]: Unknown extern function __bad_percpu_size [2022-11-25 16:43:55,336 WARN L623 FunctionHandler]: Unknown extern function __bad_percpu_size [2022-11-25 16:43:55,339 WARN L623 FunctionHandler]: Unknown extern function __bad_percpu_size [2022-11-25 16:43:55,341 WARN L623 FunctionHandler]: Unknown extern function __bad_percpu_size [2022-11-25 16:43:55,342 WARN L623 FunctionHandler]: Unknown extern function __bad_size_call_parameter [2022-11-25 16:43:55,416 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,416 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-11-25 16:43:55,452 WARN L623 FunctionHandler]: Unknown extern function nonseekable_open [2022-11-25 16:43:55,454 WARN L623 FunctionHandler]: Unknown extern function snd_lookup_oss_minor_data [2022-11-25 16:43:55,456 WARN L623 FunctionHandler]: Unknown extern function snd_card_file_add [2022-11-25 16:43:55,457 WARN L623 FunctionHandler]: Unknown extern function snd_card_file_remove [2022-11-25 16:43:55,459 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,459 WARN L623 FunctionHandler]: Unknown extern function snd_card_file_remove [2022-11-25 16:43:55,465 WARN L623 FunctionHandler]: Unknown extern function module_put [2022-11-25 16:43:55,466 WARN L623 FunctionHandler]: Unknown extern function snd_card_file_remove [2022-11-25 16:43:55,467 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,472 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:55,474 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:55,482 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:55,483 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:55,627 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:55,633 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:55,658 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:55,667 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,670 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,672 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,675 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,676 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,679 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,686 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,687 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,688 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,689 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,691 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,692 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:55,704 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:55,732 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_id [2022-11-25 16:43:55,739 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_numid [2022-11-25 16:43:55,750 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,752 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,760 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_numid [2022-11-25 16:43:55,769 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,770 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,786 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_numid [2022-11-25 16:43:55,796 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_notify [2022-11-25 16:43:55,796 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,797 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,802 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_numid [2022-11-25 16:43:55,813 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_notify [2022-11-25 16:43:55,813 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,814 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,856 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,857 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,869 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_notify [2022-11-25 16:43:55,869 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,870 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,874 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,875 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,879 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,880 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,880 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,888 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:55,889 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:55,889 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:55,893 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:55,895 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:55,896 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:55,897 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:55,898 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:55,899 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:55,915 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,941 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_nested [2022-11-25 16:43:55,944 WARN L623 FunctionHandler]: Unknown extern function snd_iprintf [2022-11-25 16:43:55,945 WARN L623 FunctionHandler]: Unknown extern function snd_iprintf [2022-11-25 16:43:55,946 WARN L623 FunctionHandler]: Unknown extern function snd_iprintf [2022-11-25 16:43:55,954 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-25 16:43:55,957 WARN L623 FunctionHandler]: Unknown extern function snd_info_get_str [2022-11-25 16:43:55,963 WARN L623 FunctionHandler]: Unknown extern function __snd_printk [2022-11-25 16:43:55,964 WARN L623 FunctionHandler]: Unknown extern function snd_info_get_str [2022-11-25 16:43:55,966 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_nested [2022-11-25 16:43:55,967 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-25 16:43:55,969 WARN L623 FunctionHandler]: Unknown extern function snd_info_get_str [2022-11-25 16:43:55,969 WARN L623 FunctionHandler]: Unknown extern function simple_strtoul [2022-11-25 16:43:55,970 WARN L623 FunctionHandler]: Unknown extern function __snd_printk [2022-11-25 16:43:55,971 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_nested [2022-11-25 16:43:55,976 WARN L623 FunctionHandler]: Unknown extern function __snd_printk [2022-11-25 16:43:55,976 WARN L623 FunctionHandler]: Unknown extern function kstrdup [2022-11-25 16:43:55,978 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,979 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,983 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:55,983 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-25 16:43:55,984 WARN L623 FunctionHandler]: Unknown extern function snd_info_get_line [2022-11-25 16:43:55,987 WARN L623 FunctionHandler]: Unknown extern function snd_info_create_card_entry [2022-11-25 16:43:55,989 WARN L623 FunctionHandler]: Unknown extern function snd_info_register [2022-11-25 16:43:55,989 WARN L623 FunctionHandler]: Unknown extern function snd_info_free_entry [2022-11-25 16:43:55,992 WARN L623 FunctionHandler]: Unknown extern function snd_info_free_entry [2022-11-25 16:43:56,019 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:56,021 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,024 WARN L623 FunctionHandler]: Unknown extern function __mutex_init [2022-11-25 16:43:56,025 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,025 WARN L623 FunctionHandler]: Unknown extern function snd_register_oss_device [2022-11-25 16:43:56,026 WARN L623 FunctionHandler]: Unknown extern function __snd_printk [2022-11-25 16:43:56,027 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,028 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:56,028 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:56,029 WARN L623 FunctionHandler]: Unknown extern function snd_oss_info_register [2022-11-25 16:43:56,030 WARN L623 FunctionHandler]: Unknown extern function snd_oss_info_register [2022-11-25 16:43:56,031 WARN L623 FunctionHandler]: Unknown extern function snd_unregister_oss_device [2022-11-25 16:43:56,049 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,050 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,050 WARN L623 FunctionHandler]: Unknown extern function ldv_check_return_value [2022-11-25 16:43:56,051 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,051 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,052 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,053 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,054 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,054 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,055 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,055 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,055 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,056 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,056 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,057 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,057 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,057 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,058 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,058 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,059 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,059 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,059 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,060 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,060 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,061 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,061 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,062 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,062 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,062 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,063 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,063 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,064 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,067 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_68a9b01f-d1cb-455b-aff9-1029b8e67785/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2022-11-25 16:43:56,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:43:56,122 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:43:56,190 WARN L623 FunctionHandler]: Unknown extern function debug_lockdep_rcu_enabled [2022-11-25 16:43:56,191 WARN L623 FunctionHandler]: Unknown extern function lockdep_rcu_dereference [2022-11-25 16:43:56,197 WARN L623 FunctionHandler]: Unknown extern function __get_free_pages [2022-11-25 16:43:56,198 WARN L623 FunctionHandler]: Unknown extern function kmem_cache_alloc_notrace [2022-11-25 16:43:56,201 WARN L623 FunctionHandler]: Unknown extern function debug_lockdep_rcu_enabled [2022-11-25 16:43:56,202 WARN L623 FunctionHandler]: Unknown extern function lockdep_rcu_dereference [2022-11-25 16:43:56,205 WARN L623 FunctionHandler]: Unknown extern function __bad_percpu_size [2022-11-25 16:43:56,206 WARN L623 FunctionHandler]: Unknown extern function __bad_percpu_size [2022-11-25 16:43:56,207 WARN L623 FunctionHandler]: Unknown extern function __bad_percpu_size [2022-11-25 16:43:56,209 WARN L623 FunctionHandler]: Unknown extern function __bad_percpu_size [2022-11-25 16:43:56,209 WARN L623 FunctionHandler]: Unknown extern function __bad_size_call_parameter [2022-11-25 16:43:56,211 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,212 WARN L623 FunctionHandler]: Unknown extern function _copy_to_user [2022-11-25 16:43:56,213 WARN L623 FunctionHandler]: Unknown extern function nonseekable_open [2022-11-25 16:43:56,213 WARN L623 FunctionHandler]: Unknown extern function snd_lookup_oss_minor_data [2022-11-25 16:43:56,214 WARN L623 FunctionHandler]: Unknown extern function snd_card_file_add [2022-11-25 16:43:56,215 WARN L623 FunctionHandler]: Unknown extern function snd_card_file_remove [2022-11-25 16:43:56,219 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,220 WARN L623 FunctionHandler]: Unknown extern function snd_card_file_remove [2022-11-25 16:43:56,221 WARN L623 FunctionHandler]: Unknown extern function module_put [2022-11-25 16:43:56,221 WARN L623 FunctionHandler]: Unknown extern function snd_card_file_remove [2022-11-25 16:43:56,221 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,223 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:56,224 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:56,226 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:56,227 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:56,259 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:56,260 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:56,268 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:56,270 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,272 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,272 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,273 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,274 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,275 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,276 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,277 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,278 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,278 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,280 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,281 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 16:43:56,283 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:56,290 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_id [2022-11-25 16:43:56,291 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_numid [2022-11-25 16:43:56,295 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,295 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,296 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_numid [2022-11-25 16:43:56,299 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,299 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,303 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_numid [2022-11-25 16:43:56,305 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_notify [2022-11-25 16:43:56,306 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,306 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,307 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_find_numid [2022-11-25 16:43:56,310 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_notify [2022-11-25 16:43:56,311 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,311 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,323 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,323 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,328 WARN L623 FunctionHandler]: Unknown extern function snd_ctl_notify [2022-11-25 16:43:56,329 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,329 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,331 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,332 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,333 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,334 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,334 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,377 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,378 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,378 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,379 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,379 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,380 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,380 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,381 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,381 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,387 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,420 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_nested [2022-11-25 16:43:56,421 WARN L623 FunctionHandler]: Unknown extern function snd_iprintf [2022-11-25 16:43:56,422 WARN L623 FunctionHandler]: Unknown extern function snd_iprintf [2022-11-25 16:43:56,422 WARN L623 FunctionHandler]: Unknown extern function snd_iprintf [2022-11-25 16:43:56,423 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-25 16:43:56,424 WARN L623 FunctionHandler]: Unknown extern function snd_info_get_str [2022-11-25 16:43:56,425 WARN L623 FunctionHandler]: Unknown extern function __snd_printk [2022-11-25 16:43:56,425 WARN L623 FunctionHandler]: Unknown extern function snd_info_get_str [2022-11-25 16:43:56,426 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_nested [2022-11-25 16:43:56,426 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-25 16:43:56,426 WARN L623 FunctionHandler]: Unknown extern function snd_info_get_str [2022-11-25 16:43:56,427 WARN L623 FunctionHandler]: Unknown extern function simple_strtoul [2022-11-25 16:43:56,427 WARN L623 FunctionHandler]: Unknown extern function __snd_printk [2022-11-25 16:43:56,428 WARN L623 FunctionHandler]: Unknown extern function mutex_lock_nested [2022-11-25 16:43:56,429 WARN L623 FunctionHandler]: Unknown extern function __snd_printk [2022-11-25 16:43:56,429 WARN L623 FunctionHandler]: Unknown extern function kstrdup [2022-11-25 16:43:56,430 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,430 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,430 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,431 WARN L623 FunctionHandler]: Unknown extern function mutex_unlock [2022-11-25 16:43:56,431 WARN L623 FunctionHandler]: Unknown extern function snd_info_get_line [2022-11-25 16:43:56,432 WARN L623 FunctionHandler]: Unknown extern function snd_info_create_card_entry [2022-11-25 16:43:56,438 WARN L623 FunctionHandler]: Unknown extern function snd_info_register [2022-11-25 16:43:56,438 WARN L623 FunctionHandler]: Unknown extern function snd_info_free_entry [2022-11-25 16:43:56,439 WARN L623 FunctionHandler]: Unknown extern function snd_info_free_entry [2022-11-25 16:43:56,459 WARN L623 FunctionHandler]: Unknown extern function warn_slowpath_fmt [2022-11-25 16:43:56,460 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,461 WARN L623 FunctionHandler]: Unknown extern function __mutex_init [2022-11-25 16:43:56,462 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 16:43:56,462 WARN L623 FunctionHandler]: Unknown extern function snd_register_oss_device [2022-11-25 16:43:56,462 WARN L623 FunctionHandler]: Unknown extern function __snd_printk [2022-11-25 16:43:56,463 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 16:43:56,463 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:56,464 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 16:43:56,464 WARN L623 FunctionHandler]: Unknown extern function snd_oss_info_register [2022-11-25 16:43:56,469 WARN L623 FunctionHandler]: Unknown extern function snd_oss_info_register [2022-11-25 16:43:56,469 WARN L623 FunctionHandler]: Unknown extern function snd_unregister_oss_device [2022-11-25 16:43:56,471 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,472 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,472 WARN L623 FunctionHandler]: Unknown extern function ldv_check_return_value [2022-11-25 16:43:56,472 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,473 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,473 WARN L623 FunctionHandler]: Unknown extern function ldv_handler_precall [2022-11-25 16:43:56,474 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,474 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,474 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,474 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,475 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,475 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,475 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,476 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,476 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,476 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,477 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,477 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,477 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,478 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,478 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,479 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,479 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,479 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,480 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,480 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,480 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,481 WARN L623 FunctionHandler]: Unknown extern function down_read [2022-11-25 16:43:56,481 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,481 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,482 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,482 WARN L623 FunctionHandler]: Unknown extern function up_read [2022-11-25 16:43:56,482 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_68a9b01f-d1cb-455b-aff9-1029b8e67785/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2022-11-25 16:43:56,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:43:56,527 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:43:56,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56 WrapperNode [2022-11-25 16:43:56,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:43:56,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:43:56,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:43:56,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:43:56,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:56,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:56,745 INFO L138 Inliner]: procedures = 186, calls = 1553, calls flagged for inlining = 91, calls inlined = 88, statements flattened = 4274 [2022-11-25 16:43:56,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:43:56,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:43:56,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:43:56,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:43:56,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:56,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:56,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:56,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:56,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:56,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:56,966 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:56,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:57,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:43:57,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:43:57,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:43:57,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:43:57,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (1/1) ... [2022-11-25 16:43:57,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:43:57,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:57,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:43:57,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:43:57,113 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_sw [2022-11-25 16:43:57,113 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_sw [2022-11-25 16:43:57,113 INFO L130 BoogieDeclarations]: Found specification of procedure snd_card_file_remove [2022-11-25 16:43:57,113 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_card_file_remove [2022-11-25 16:43:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-25 16:43:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-25 16:43:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-25 16:43:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_recsrc2 [2022-11-25 16:43:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_recsrc2 [2022-11-25 16:43:57,114 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_find_numid [2022-11-25 16:43:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_find_numid [2022-11-25 16:43:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv [2022-11-25 16:43:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv [2022-11-25 16:43:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:43:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-25 16:43:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-25 16:43:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_input [2022-11-25 16:43:57,116 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_input [2022-11-25 16:43:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-25 16:43:57,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-25 16:43:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-25 16:43:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-25 16:43:57,116 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-25 16:43:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_test_id [2022-11-25 16:43:57,117 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_test_id [2022-11-25 16:43:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:43:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-25 16:43:57,117 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-25 16:43:57,117 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2022-11-25 16:43:57,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2022-11-25 16:43:57,118 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-25 16:43:57,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-25 16:43:57,118 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_vol [2022-11-25 16:43:57,118 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_vol [2022-11-25 16:43:57,118 INFO L130 BoogieDeclarations]: Found specification of procedure snd_info_free_entry [2022-11-25 16:43:57,118 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_info_free_entry [2022-11-25 16:43:57,119 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-25 16:43:57,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-25 16:43:57,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-25 16:43:57,119 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-25 16:43:57,119 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_release [2022-11-25 16:43:57,119 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_release [2022-11-25 16:43:57,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 16:43:57,120 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv2 [2022-11-25 16:43:57,120 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv2 [2022-11-25 16:43:57,120 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv1 [2022-11-25 16:43:57,120 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv1 [2022-11-25 16:43:57,120 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-11-25 16:43:57,121 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2022-11-25 16:43:57,121 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2022-11-25 16:43:57,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:43:57,121 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_held [2022-11-25 16:43:57,121 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_held [2022-11-25 16:43:57,121 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-25 16:43:57,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-25 16:43:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:43:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 16:43:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-25 16:43:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure mixer_slot_clear [2022-11-25 16:43:57,123 INFO L138 BoogieDeclarations]: Found implementation of procedure mixer_slot_clear [2022-11-25 16:43:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_notify [2022-11-25 16:43:57,123 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_notify [2022-11-25 16:43:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-25 16:43:57,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-25 16:43:57,124 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_ioctl1 [2022-11-25 16:43:57,124 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_ioctl1 [2022-11-25 16:43:57,124 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2022-11-25 16:43:57,124 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2022-11-25 16:43:57,124 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_down_read_controls_rwsem_of_snd_card [2022-11-25 16:43:57,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_down_read_controls_rwsem_of_snd_card [2022-11-25 16:43:57,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 16:43:57,125 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-11-25 16:43:57,125 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-11-25 16:43:57,125 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-25 16:43:57,125 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-25 16:43:57,125 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_sw [2022-11-25 16:43:57,126 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_sw [2022-11-25 16:43:57,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_up_read_controls_rwsem_of_snd_card [2022-11-25 16:43:57,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_up_read_controls_rwsem_of_snd_card [2022-11-25 16:43:57,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:43:57,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 16:43:57,126 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_test [2022-11-25 16:43:57,127 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_test [2022-11-25 16:43:57,128 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-11-25 16:43:57,128 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-11-25 16:43:57,128 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-25 16:43:57,128 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-25 16:43:57,128 INFO L130 BoogieDeclarations]: Found specification of procedure snd_oss_info_register [2022-11-25 16:43:57,129 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_oss_info_register [2022-11-25 16:43:57,129 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_vol [2022-11-25 16:43:57,129 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_vol [2022-11-25 16:43:57,131 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_notify_handler [2022-11-25 16:43:57,131 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_notify_handler [2022-11-25 16:43:57,131 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-25 16:43:57,133 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-25 16:43:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-25 16:43:57,133 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-25 16:43:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-25 16:43:57,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-25 16:43:57,133 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_dereference [2022-11-25 16:43:57,133 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_dereference [2022-11-25 16:43:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_open [2022-11-25 16:43:57,134 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_open [2022-11-25 16:43:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:43:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-25 16:43:57,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-25 16:43:57,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:43:57,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:43:57,825 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:43:57,832 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:44:11,421 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:44:11,457 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:44:11,457 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 16:44:11,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:44:11 BoogieIcfgContainer [2022-11-25 16:44:11,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:44:11,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:44:11,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:44:11,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:44:11,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:43:54" (1/3) ... [2022-11-25 16:44:11,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:44:11, skipping insertion in model container [2022-11-25 16:44:11,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:43:56" (2/3) ... [2022-11-25 16:44:11,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:44:11, skipping insertion in model container [2022-11-25 16:44:11,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:44:11" (3/3) ... [2022-11-25 16:44:11,480 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-25 16:44:11,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:44:11,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:44:11,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:44:11,635 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;@7f10da9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:44:11,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:44:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 1211 states, 908 states have (on average 1.4691629955947136) internal successors, (1334), 925 states have internal predecessors, (1334), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) [2022-11-25 16:44:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 16:44:11,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:11,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:11,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:11,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1220371651, now seen corresponding path program 1 times [2022-11-25 16:44:11,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:11,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345234666] [2022-11-25 16:44:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:11,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:12,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:12,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:12,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345234666] [2022-11-25 16:44:12,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345234666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:12,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:12,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:44:12,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254321637] [2022-11-25 16:44:12,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:12,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:12,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:12,408 INFO L87 Difference]: Start difference. First operand has 1211 states, 908 states have (on average 1.4691629955947136) internal successors, (1334), 925 states have internal predecessors, (1334), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:44:12,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:12,710 INFO L93 Difference]: Finished difference Result 2362 states and 3719 transitions. [2022-11-25 16:44:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:12,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-25 16:44:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:12,745 INFO L225 Difference]: With dead ends: 2362 [2022-11-25 16:44:12,745 INFO L226 Difference]: Without dead ends: 1152 [2022-11-25 16:44:12,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 16:44:12,773 INFO L413 NwaCegarLoop]: 1733 mSDtfsCounter, 5 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3463 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:12,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3463 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:44:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-11-25 16:44:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1147. [2022-11-25 16:44:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 855 states have (on average 1.4526315789473685) internal successors, (1242), 868 states have internal predecessors, (1242), 247 states have call successors, (247), 45 states have call predecessors, (247), 44 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2022-11-25 16:44:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1733 transitions. [2022-11-25 16:44:12,935 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1733 transitions. Word has length 14 [2022-11-25 16:44:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:12,935 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1733 transitions. [2022-11-25 16:44:12,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:44:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1733 transitions. [2022-11-25 16:44:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 16:44:12,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:12,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:12,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:44:12,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:12,939 INFO L85 PathProgramCache]: Analyzing trace with hash -128005074, now seen corresponding path program 1 times [2022-11-25 16:44:12,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:12,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029419013] [2022-11-25 16:44:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:12,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:13,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:13,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:13,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029419013] [2022-11-25 16:44:13,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029419013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:13,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570328584] [2022-11-25 16:44:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:13,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:13,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:13,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:13,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:44:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:13,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:44:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:14,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:14,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570328584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:14,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:44:14,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 16:44:14,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046269744] [2022-11-25 16:44:14,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:14,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:44:14,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:14,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:44:14,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:44:14,175 INFO L87 Difference]: Start difference. First operand 1147 states and 1733 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:44:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:14,381 INFO L93 Difference]: Finished difference Result 2300 states and 3477 transitions. [2022-11-25 16:44:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:44:14,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-25 16:44:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:14,392 INFO L225 Difference]: With dead ends: 2300 [2022-11-25 16:44:14,392 INFO L226 Difference]: Without dead ends: 1165 [2022-11-25 16:44:14,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:44:14,402 INFO L413 NwaCegarLoop]: 1731 mSDtfsCounter, 16 mSDsluCounter, 5178 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6909 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:14,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6909 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:44:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-11-25 16:44:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2022-11-25 16:44:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 870 states have (on average 1.4482758620689655) internal successors, (1260), 883 states have internal predecessors, (1260), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2022-11-25 16:44:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1757 transitions. [2022-11-25 16:44:14,504 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1757 transitions. Word has length 18 [2022-11-25 16:44:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:14,504 INFO L495 AbstractCegarLoop]: Abstraction has 1165 states and 1757 transitions. [2022-11-25 16:44:14,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:44:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1757 transitions. [2022-11-25 16:44:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 16:44:14,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:14,507 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:14,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 16:44:14,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 16:44:14,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:14,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1329590639, now seen corresponding path program 2 times [2022-11-25 16:44:14,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:14,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093672484] [2022-11-25 16:44:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:14,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:14,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 16:44:14,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:14,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093672484] [2022-11-25 16:44:14,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093672484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:14,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:14,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:44:14,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051445385] [2022-11-25 16:44:14,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:14,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:44:14,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:44:14,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:14,973 INFO L87 Difference]: Start difference. First operand 1165 states and 1757 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:44:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:15,096 INFO L93 Difference]: Finished difference Result 1170 states and 1761 transitions. [2022-11-25 16:44:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:44:15,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-25 16:44:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:15,104 INFO L225 Difference]: With dead ends: 1170 [2022-11-25 16:44:15,104 INFO L226 Difference]: Without dead ends: 1165 [2022-11-25 16:44:15,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:44:15,107 INFO L413 NwaCegarLoop]: 1729 mSDtfsCounter, 75 mSDsluCounter, 3367 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 5096 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:15,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 5096 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:44:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-11-25 16:44:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2022-11-25 16:44:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 870 states have (on average 1.4471264367816092) internal successors, (1259), 883 states have internal predecessors, (1259), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2022-11-25 16:44:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1756 transitions. [2022-11-25 16:44:15,163 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1756 transitions. Word has length 30 [2022-11-25 16:44:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:15,164 INFO L495 AbstractCegarLoop]: Abstraction has 1165 states and 1756 transitions. [2022-11-25 16:44:15,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:44:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1756 transitions. [2022-11-25 16:44:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 16:44:15,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:15,167 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:15,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:44:15,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1167211119, now seen corresponding path program 1 times [2022-11-25 16:44:15,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:15,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060662356] [2022-11-25 16:44:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:15,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:15,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:15,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-25 16:44:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 16:44:15,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:15,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060662356] [2022-11-25 16:44:15,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060662356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:15,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:15,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:44:15,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523718445] [2022-11-25 16:44:15,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:15,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:15,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:15,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:15,498 INFO L87 Difference]: Start difference. First operand 1165 states and 1756 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 16:44:15,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:15,584 INFO L93 Difference]: Finished difference Result 1177 states and 1770 transitions. [2022-11-25 16:44:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-25 16:44:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:15,593 INFO L225 Difference]: With dead ends: 1177 [2022-11-25 16:44:15,593 INFO L226 Difference]: Without dead ends: 1171 [2022-11-25 16:44:15,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 16:44:15,604 INFO L413 NwaCegarLoop]: 1729 mSDtfsCounter, 5 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3454 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:15,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3454 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:44:15,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-25 16:44:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1166. [2022-11-25 16:44:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 871 states have (on average 1.4466130884041333) internal successors, (1260), 884 states have internal predecessors, (1260), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2022-11-25 16:44:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1757 transitions. [2022-11-25 16:44:15,668 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1757 transitions. Word has length 38 [2022-11-25 16:44:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:15,669 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 1757 transitions. [2022-11-25 16:44:15,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 16:44:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1757 transitions. [2022-11-25 16:44:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 16:44:15,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:15,676 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-11-25 16:44:15,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:44:15,677 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:15,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1667737210, now seen corresponding path program 1 times [2022-11-25 16:44:15,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:15,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122086788] [2022-11-25 16:44:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:15,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:15,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:15,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-25 16:44:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 16:44:15,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:15,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122086788] [2022-11-25 16:44:15,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122086788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:15,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:15,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:44:15,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665774603] [2022-11-25 16:44:15,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:15,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:15,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:15,924 INFO L87 Difference]: Start difference. First operand 1166 states and 1757 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 16:44:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:16,430 INFO L93 Difference]: Finished difference Result 1961 states and 2990 transitions. [2022-11-25 16:44:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-11-25 16:44:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:16,446 INFO L225 Difference]: With dead ends: 1961 [2022-11-25 16:44:16,447 INFO L226 Difference]: Without dead ends: 1954 [2022-11-25 16:44:16,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 16:44:16,450 INFO L413 NwaCegarLoop]: 1859 mSDtfsCounter, 1141 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:16,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1141 Valid, 3577 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:44:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2022-11-25 16:44:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1952. [2022-11-25 16:44:16,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1500 states have (on average 1.46) internal successors, (2190), 1522 states have internal predecessors, (2190), 376 states have call successors, (376), 78 states have call predecessors, (376), 75 states have return successors, (414), 366 states have call predecessors, (414), 373 states have call successors, (414) [2022-11-25 16:44:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2980 transitions. [2022-11-25 16:44:16,569 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2980 transitions. Word has length 42 [2022-11-25 16:44:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:16,569 INFO L495 AbstractCegarLoop]: Abstraction has 1952 states and 2980 transitions. [2022-11-25 16:44:16,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 16:44:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2980 transitions. [2022-11-25 16:44:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 16:44:16,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:16,575 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-11-25 16:44:16,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:44:16,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:16,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash 886972045, now seen corresponding path program 1 times [2022-11-25 16:44:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:16,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304740338] [2022-11-25 16:44:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:16,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:17,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:17,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:44:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:17,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:44:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:17,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 16:44:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:17,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-25 16:44:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:17,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-25 16:44:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:17,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 16:44:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:17,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:44:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 16:44:17,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:17,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304740338] [2022-11-25 16:44:17,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304740338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:17,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:17,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 16:44:17,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540254318] [2022-11-25 16:44:17,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:44:17,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:44:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:44:17,739 INFO L87 Difference]: Start difference. First operand 1952 states and 2980 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 16:44:21,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:44:41,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:41,092 INFO L93 Difference]: Finished difference Result 4564 states and 7241 transitions. [2022-11-25 16:44:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 16:44:41,093 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 88 [2022-11-25 16:44:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:41,120 INFO L225 Difference]: With dead ends: 4564 [2022-11-25 16:44:41,121 INFO L226 Difference]: Without dead ends: 2667 [2022-11-25 16:44:41,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-11-25 16:44:41,137 INFO L413 NwaCegarLoop]: 1460 mSDtfsCounter, 2744 mSDsluCounter, 8781 mSDsCounter, 0 mSdLazyCounter, 5301 mSolverCounterSat, 1037 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2881 SdHoareTripleChecker+Valid, 10241 SdHoareTripleChecker+Invalid, 6339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 5301 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:41,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2881 Valid, 10241 Invalid, 6339 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1037 Valid, 5301 Invalid, 1 Unknown, 0 Unchecked, 21.8s Time] [2022-11-25 16:44:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-11-25 16:44:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2191. [2022-11-25 16:44:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1690 states have (on average 1.4497041420118344) internal successors, (2450), 1710 states have internal predecessors, (2450), 415 states have call successors, (415), 78 states have call predecessors, (415), 85 states have return successors, (531), 417 states have call predecessors, (531), 412 states have call successors, (531) [2022-11-25 16:44:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 3396 transitions. [2022-11-25 16:44:41,334 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 3396 transitions. Word has length 88 [2022-11-25 16:44:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:41,335 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 3396 transitions. [2022-11-25 16:44:41,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 16:44:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 3396 transitions. [2022-11-25 16:44:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 16:44:41,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:41,342 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:41,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:44:41,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash -351106067, now seen corresponding path program 1 times [2022-11-25 16:44:41,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:41,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200717825] [2022-11-25 16:44:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:41,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:41,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:44:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:41,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 16:44:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:41,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 16:44:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:42,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 16:44:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:42,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 16:44:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:42,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 16:44:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:42,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-25 16:44:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:42,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:44:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:44:42,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:42,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200717825] [2022-11-25 16:44:42,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200717825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:42,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755214667] [2022-11-25 16:44:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:42,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:42,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:42,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:42,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:44:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:42,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1934 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:44:42,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:44:43,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:44:43,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755214667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:43,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:44:43,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-11-25 16:44:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725491088] [2022-11-25 16:44:43,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:43,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:44:43,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:44:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:44:43,524 INFO L87 Difference]: Start difference. First operand 2191 states and 3396 transitions. Second operand has 15 states, 15 states have (on average 7.4) internal successors, (111), 13 states have internal predecessors, (111), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:44:47,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:45:02,145 INFO L93 Difference]: Finished difference Result 4871 states and 7765 transitions. [2022-11-25 16:45:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 16:45:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.4) internal successors, (111), 13 states have internal predecessors, (111), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2022-11-25 16:45:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:45:02,170 INFO L225 Difference]: With dead ends: 4871 [2022-11-25 16:45:02,170 INFO L226 Difference]: Without dead ends: 2731 [2022-11-25 16:45:02,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-25 16:45:02,185 INFO L413 NwaCegarLoop]: 1463 mSDtfsCounter, 1938 mSDsluCounter, 6705 mSDsCounter, 0 mSdLazyCounter, 4091 mSolverCounterSat, 883 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2047 SdHoareTripleChecker+Valid, 8168 SdHoareTripleChecker+Invalid, 4975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 883 IncrementalHoareTripleChecker+Valid, 4091 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:45:02,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2047 Valid, 8168 Invalid, 4975 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [883 Valid, 4091 Invalid, 1 Unknown, 0 Unchecked, 18.1s Time] [2022-11-25 16:45:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2022-11-25 16:45:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 2263. [2022-11-25 16:45:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 1750 states have (on average 1.441142857142857) internal successors, (2522), 1770 states have internal predecessors, (2522), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-25 16:45:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3504 transitions. [2022-11-25 16:45:02,420 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3504 transitions. Word has length 93 [2022-11-25 16:45:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:45:02,421 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 3504 transitions. [2022-11-25 16:45:02,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.4) internal successors, (111), 13 states have internal predecessors, (111), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:45:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3504 transitions. [2022-11-25 16:45:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 16:45:02,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:45:02,426 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:02,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:45:02,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:02,647 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:45:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:45:02,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1052631877, now seen corresponding path program 1 times [2022-11-25 16:45:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:45:02,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616648074] [2022-11-25 16:45:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:45:02,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:45:02,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006034733] [2022-11-25 16:45:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:02,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:02,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:45:02,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:45:02,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:45:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 16:45:03,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:45:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 16:45:03,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:45:03,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:45:03,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616648074] [2022-11-25 16:45:03,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:45:03,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006034733] [2022-11-25 16:45:03,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006034733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:45:03,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:45:03,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:45:03,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539397760] [2022-11-25 16:45:03,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:45:03,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:45:03,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:45:03,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:45:03,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:45:03,940 INFO L87 Difference]: Start difference. First operand 2263 states and 3504 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-25 16:45:05,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:45:06,114 INFO L93 Difference]: Finished difference Result 4521 states and 7051 transitions. [2022-11-25 16:45:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:45:06,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 96 [2022-11-25 16:45:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:45:06,151 INFO L225 Difference]: With dead ends: 4521 [2022-11-25 16:45:06,151 INFO L226 Difference]: Without dead ends: 2267 [2022-11-25 16:45:06,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 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 16:45:06,167 INFO L413 NwaCegarLoop]: 1729 mSDtfsCounter, 1 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3455 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:45:06,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3455 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 16:45:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2022-11-25 16:45:06,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2265. [2022-11-25 16:45:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 1752 states have (on average 1.4406392694063928) internal successors, (2524), 1772 states have internal predecessors, (2524), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-25 16:45:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3506 transitions. [2022-11-25 16:45:06,316 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3506 transitions. Word has length 96 [2022-11-25 16:45:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:45:06,316 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 3506 transitions. [2022-11-25 16:45:06,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-25 16:45:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3506 transitions. [2022-11-25 16:45:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-25 16:45:06,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:45:06,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:06,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 16:45:06,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:06,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:45:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:45:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1860645118, now seen corresponding path program 1 times [2022-11-25 16:45:06,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:45:06,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500049463] [2022-11-25 16:45:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:45:06,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:45:06,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489193693] [2022-11-25 16:45:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:06,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:06,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:45:06,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:45:06,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:45:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:45:07,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:45:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 16:45:07,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:45:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 16:45:07,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:45:07,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500049463] [2022-11-25 16:45:07,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:45:07,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489193693] [2022-11-25 16:45:07,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489193693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:45:07,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:45:07,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-25 16:45:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060787896] [2022-11-25 16:45:07,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:45:07,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:45:07,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:45:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:45:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:45:07,998 INFO L87 Difference]: Start difference. First operand 2265 states and 3506 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-25 16:45:10,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:12,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:14,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:16,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:45:16,443 INFO L93 Difference]: Finished difference Result 4533 states and 7067 transitions. [2022-11-25 16:45:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:45:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 94 [2022-11-25 16:45:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:45:16,498 INFO L225 Difference]: With dead ends: 4533 [2022-11-25 16:45:16,498 INFO L226 Difference]: Without dead ends: 2277 [2022-11-25 16:45:16,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:45:16,513 INFO L413 NwaCegarLoop]: 1729 mSDtfsCounter, 2 mSDsluCounter, 3452 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5181 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:45:16,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5181 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 4 Unknown, 0 Unchecked, 8.3s Time] [2022-11-25 16:45:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-11-25 16:45:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2277. [2022-11-25 16:45:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 1764 states have (on average 1.437641723356009) internal successors, (2536), 1784 states have internal predecessors, (2536), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-25 16:45:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3518 transitions. [2022-11-25 16:45:16,644 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3518 transitions. Word has length 94 [2022-11-25 16:45:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:45:16,644 INFO L495 AbstractCegarLoop]: Abstraction has 2277 states and 3518 transitions. [2022-11-25 16:45:16,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-25 16:45:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3518 transitions. [2022-11-25 16:45:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-25 16:45:16,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:45:16,648 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:16,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:45:16,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:16,870 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:45:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:45:16,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1653200427, now seen corresponding path program 1 times [2022-11-25 16:45:16,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:45:16,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431887972] [2022-11-25 16:45:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:16,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:45:17,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:45:17,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952656133] [2022-11-25 16:45:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:17,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:45:17,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:45:17,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:45:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:18,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 3270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:45:18,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:45:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 16:45:18,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:45:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 16:45:18,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:45:18,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431887972] [2022-11-25 16:45:18,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:45:18,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952656133] [2022-11-25 16:45:18,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952656133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:45:18,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:45:18,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-25 16:45:18,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746604575] [2022-11-25 16:45:18,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:45:18,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:45:18,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:45:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:45:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:45:18,875 INFO L87 Difference]: Start difference. First operand 2277 states and 3518 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-25 16:45:21,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:23,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:25,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:27,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:29,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:31,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:33,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:35,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:37,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:39,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:45:39,506 INFO L93 Difference]: Finished difference Result 4569 states and 7109 transitions. [2022-11-25 16:45:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:45:39,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 104 [2022-11-25 16:45:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:45:39,553 INFO L225 Difference]: With dead ends: 4569 [2022-11-25 16:45:39,553 INFO L226 Difference]: Without dead ends: 2301 [2022-11-25 16:45:39,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:45:39,569 INFO L413 NwaCegarLoop]: 1729 mSDtfsCounter, 2 mSDsluCounter, 6904 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8633 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:45:39,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8633 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 10 Unknown, 0 Unchecked, 20.5s Time] [2022-11-25 16:45:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2022-11-25 16:45:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2301. [2022-11-25 16:45:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 1788 states have (on average 1.4317673378076063) internal successors, (2560), 1808 states have internal predecessors, (2560), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-25 16:45:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3542 transitions. [2022-11-25 16:45:39,712 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3542 transitions. Word has length 104 [2022-11-25 16:45:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:45:39,712 INFO L495 AbstractCegarLoop]: Abstraction has 2301 states and 3542 transitions. [2022-11-25 16:45:39,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-25 16:45:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3542 transitions. [2022-11-25 16:45:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-25 16:45:39,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:45:39,718 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:39,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:45:39,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 16:45:39,932 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:45:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:45:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1001885438, now seen corresponding path program 2 times [2022-11-25 16:45:39,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:45:39,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850118056] [2022-11-25 16:45:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:39,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:45:40,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:45:40,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272637261] [2022-11-25 16:45:40,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:45:40,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:40,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:45:40,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:45:40,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:45:46,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 16:45:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:45:46,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 2973 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 16:45:46,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:45:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 16:45:46,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:45:46,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:45:46,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850118056] [2022-11-25 16:45:46,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:45:46,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272637261] [2022-11-25 16:45:46,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272637261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:45:46,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:45:46,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:45:46,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851833629] [2022-11-25 16:45:46,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:45:46,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:45:46,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:45:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:45:46,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:45:46,550 INFO L87 Difference]: Start difference. First operand 2301 states and 3542 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-25 16:45:48,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:45:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:45:48,978 INFO L93 Difference]: Finished difference Result 4601 states and 7152 transitions. [2022-11-25 16:45:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:45:48,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2022-11-25 16:45:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:45:48,996 INFO L225 Difference]: With dead ends: 4601 [2022-11-25 16:45:48,997 INFO L226 Difference]: Without dead ends: 2309 [2022-11-25 16:45:49,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:45:49,010 INFO L413 NwaCegarLoop]: 1733 mSDtfsCounter, 5 mSDsluCounter, 3444 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5177 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:45:49,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 5177 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 16:45:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2022-11-25 16:45:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2305. [2022-11-25 16:45:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 1792 states have (on average 1.4308035714285714) internal successors, (2564), 1812 states have internal predecessors, (2564), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2022-11-25 16:45:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3546 transitions. [2022-11-25 16:45:49,148 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3546 transitions. Word has length 112 [2022-11-25 16:45:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:45:49,149 INFO L495 AbstractCegarLoop]: Abstraction has 2305 states and 3546 transitions. [2022-11-25 16:45:49,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-25 16:45:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3546 transitions. [2022-11-25 16:45:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 16:45:49,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:45:49,155 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:45:49,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:45:49,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:49,383 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:45:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:45:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash -913396776, now seen corresponding path program 1 times [2022-11-25 16:45:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:45:49,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831740558] [2022-11-25 16:45:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:45:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:45:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:50,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 16:45:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:50,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-25 16:45:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:50,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-25 16:45:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:50,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 16:45:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:50,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-25 16:45:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:50,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-25 16:45:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:50,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:45:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:45:50,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:45:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831740558] [2022-11-25 16:45:50,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831740558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:45:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900325755] [2022-11-25 16:45:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:50,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:50,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:45:50,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:45:50,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:45:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:51,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1984 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 16:45:51,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:45:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:45:52,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:45:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:45:53,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900325755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:45:53,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:45:53,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-11-25 16:45:53,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304571536] [2022-11-25 16:45:53,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:45:53,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 16:45:53,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:45:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 16:45:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-11-25 16:45:53,760 INFO L87 Difference]: Start difference. First operand 2305 states and 3546 transitions. Second operand has 27 states, 27 states have (on average 5.851851851851852) internal successors, (158), 25 states have internal predecessors, (158), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:45:58,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:46:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:46:15,521 INFO L93 Difference]: Finished difference Result 5099 states and 8077 transitions. [2022-11-25 16:46:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 16:46:15,522 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.851851851851852) internal successors, (158), 25 states have internal predecessors, (158), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2022-11-25 16:46:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:46:15,546 INFO L225 Difference]: With dead ends: 5099 [2022-11-25 16:46:15,546 INFO L226 Difference]: Without dead ends: 2917 [2022-11-25 16:46:15,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-11-25 16:46:15,557 INFO L413 NwaCegarLoop]: 1478 mSDtfsCounter, 2022 mSDsluCounter, 8123 mSDsCounter, 0 mSdLazyCounter, 4662 mSolverCounterSat, 976 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2157 SdHoareTripleChecker+Valid, 9601 SdHoareTripleChecker+Invalid, 5639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 976 IncrementalHoareTripleChecker+Valid, 4662 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:46:15,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2157 Valid, 9601 Invalid, 5639 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [976 Valid, 4662 Invalid, 1 Unknown, 0 Unchecked, 21.2s Time] [2022-11-25 16:46:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2022-11-25 16:46:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2449. [2022-11-25 16:46:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 1912 states have (on average 1.4163179916317992) internal successors, (2708), 1932 states have internal predecessors, (2708), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2022-11-25 16:46:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3762 transitions. [2022-11-25 16:46:15,734 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3762 transitions. Word has length 116 [2022-11-25 16:46:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:46:15,735 INFO L495 AbstractCegarLoop]: Abstraction has 2449 states and 3762 transitions. [2022-11-25 16:46:15,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.851851851851852) internal successors, (158), 25 states have internal predecessors, (158), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:46:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3762 transitions. [2022-11-25 16:46:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-25 16:46:15,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:46:15,742 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:46:15,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 16:46:15,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:46:15,955 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:46:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:46:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2018039925, now seen corresponding path program 1 times [2022-11-25 16:46:15,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:46:15,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431778705] [2022-11-25 16:46:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:15,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:46:16,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:46:16,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493225181] [2022-11-25 16:46:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:16,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:46:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:46:16,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:46:16,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:46:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:17,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 3396 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 16:46:17,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:46:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 16:46:18,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:46:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:46:19,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:46:19,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431778705] [2022-11-25 16:46:19,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:46:19,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493225181] [2022-11-25 16:46:19,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493225181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:46:19,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:46:19,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-25 16:46:19,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934019504] [2022-11-25 16:46:19,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:46:19,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 16:46:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:46:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 16:46:19,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-25 16:46:19,537 INFO L87 Difference]: Start difference. First operand 2449 states and 3762 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 16:46:21,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:46:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:46:22,024 INFO L93 Difference]: Finished difference Result 4937 states and 7681 transitions. [2022-11-25 16:46:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 16:46:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 123 [2022-11-25 16:46:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:46:22,073 INFO L225 Difference]: With dead ends: 4937 [2022-11-25 16:46:22,073 INFO L226 Difference]: Without dead ends: 2497 [2022-11-25 16:46:22,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-25 16:46:22,089 INFO L413 NwaCegarLoop]: 1729 mSDtfsCounter, 2 mSDsluCounter, 12082 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13811 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:46:22,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13811 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 16:46:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-11-25 16:46:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2497. [2022-11-25 16:46:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 1960 states have (on average 1.4061224489795918) internal successors, (2756), 1980 states have internal predecessors, (2756), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2022-11-25 16:46:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 3810 transitions. [2022-11-25 16:46:22,240 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 3810 transitions. Word has length 123 [2022-11-25 16:46:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:46:22,240 INFO L495 AbstractCegarLoop]: Abstraction has 2497 states and 3810 transitions. [2022-11-25 16:46:22,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 16:46:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 3810 transitions. [2022-11-25 16:46:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-25 16:46:22,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:46:22,249 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:46:22,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:46:22,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 16:46:22,463 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:46:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:46:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash 247529220, now seen corresponding path program 1 times [2022-11-25 16:46:22,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:46:22,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31069695] [2022-11-25 16:46:22,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:46:22,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:46:22,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165501550] [2022-11-25 16:46:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:22,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:46:22,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:46:22,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:46:22,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:46:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 3603 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 16:46:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:46:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 4 proven. 484 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 16:46:26,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:46:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 16:46:28,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:46:28,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31069695] [2022-11-25 16:46:28,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:46:28,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165501550] [2022-11-25 16:46:28,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165501550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:46:28,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:46:28,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 34 [2022-11-25 16:46:28,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679889357] [2022-11-25 16:46:28,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:46:28,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 16:46:28,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:46:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 16:46:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 16:46:28,711 INFO L87 Difference]: Start difference. First operand 2497 states and 3810 transitions. Second operand has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 16:46:31,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:46:33,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:46:35,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:46:37,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:46:39,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:46:41,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:46:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:46:41,458 INFO L93 Difference]: Finished difference Result 5025 states and 7765 transitions. [2022-11-25 16:46:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 16:46:41,468 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 159 [2022-11-25 16:46:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:46:41,482 INFO L225 Difference]: With dead ends: 5025 [2022-11-25 16:46:41,482 INFO L226 Difference]: Without dead ends: 2537 [2022-11-25 16:46:41,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 270 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 16:46:41,495 INFO L413 NwaCegarLoop]: 1729 mSDtfsCounter, 1 mSDsluCounter, 10356 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12085 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:46:41,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12085 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 6 Unknown, 0 Unchecked, 12.5s Time] [2022-11-25 16:46:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-11-25 16:46:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2537. [2022-11-25 16:46:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2000 states have (on average 1.398) internal successors, (2796), 2020 states have internal predecessors, (2796), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2022-11-25 16:46:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 3850 transitions. [2022-11-25 16:46:41,636 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 3850 transitions. Word has length 159 [2022-11-25 16:46:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:46:41,637 INFO L495 AbstractCegarLoop]: Abstraction has 2537 states and 3850 transitions. [2022-11-25 16:46:41,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-25 16:46:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 3850 transitions. [2022-11-25 16:46:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-25 16:46:41,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:46:41,646 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:46:41,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:46:41,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:46:41,862 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:46:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:46:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash -668184310, now seen corresponding path program 1 times [2022-11-25 16:46:41,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:46:41,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474392537] [2022-11-25 16:46:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:46:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:44,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:46:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:44,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-25 16:46:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:44,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-25 16:46:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:44,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-25 16:46:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:44,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-25 16:46:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:44,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-25 16:46:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:44,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-25 16:46:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:44,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:46:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:46:44,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:46:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474392537] [2022-11-25 16:46:44,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474392537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:46:44,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562878774] [2022-11-25 16:46:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:46:44,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:46:44,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:46:44,959 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:46:44,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:46:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:46,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2088 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 16:46:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:46:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 2 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:46:46,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:46:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:46:49,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562878774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:46:49,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:46:49,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 37 [2022-11-25 16:46:49,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579832539] [2022-11-25 16:46:49,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:46:49,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 16:46:49,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:46:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 16:46:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 16:46:49,990 INFO L87 Difference]: Start difference. First operand 2537 states and 3850 transitions. Second operand has 37 states, 37 states have (on average 5.4324324324324325) internal successors, (201), 35 states have internal predecessors, (201), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:46:54,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:47:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:47:10,806 INFO L93 Difference]: Finished difference Result 5395 states and 8429 transitions. [2022-11-25 16:47:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 16:47:10,807 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.4324324324324325) internal successors, (201), 35 states have internal predecessors, (201), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 163 [2022-11-25 16:47:10,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:47:10,837 INFO L225 Difference]: With dead ends: 5395 [2022-11-25 16:47:10,837 INFO L226 Difference]: Without dead ends: 3125 [2022-11-25 16:47:10,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 317 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 16:47:10,847 INFO L413 NwaCegarLoop]: 1496 mSDtfsCounter, 2048 mSDsluCounter, 6809 mSDsCounter, 0 mSdLazyCounter, 4253 mSolverCounterSat, 1019 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 8305 SdHoareTripleChecker+Invalid, 5273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 4253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:47:10,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2203 Valid, 8305 Invalid, 5273 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1019 Valid, 4253 Invalid, 1 Unknown, 0 Unchecked, 20.2s Time] [2022-11-25 16:47:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2022-11-25 16:47:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2657. [2022-11-25 16:47:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2100 states have (on average 1.3885714285714286) internal successors, (2916), 2120 states have internal predecessors, (2916), 471 states have call successors, (471), 78 states have call predecessors, (471), 85 states have return successors, (643), 473 states have call predecessors, (643), 468 states have call successors, (643) [2022-11-25 16:47:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4030 transitions. [2022-11-25 16:47:11,016 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4030 transitions. Word has length 163 [2022-11-25 16:47:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:47:11,016 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4030 transitions. [2022-11-25 16:47:11,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.4324324324324325) internal successors, (201), 35 states have internal predecessors, (201), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:47:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4030 transitions. [2022-11-25 16:47:11,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-25 16:47:11,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:47:11,026 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:47:11,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:47:11,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 16:47:11,240 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:47:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:47:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1279476083, now seen corresponding path program 2 times [2022-11-25 16:47:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:47:11,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296819216] [2022-11-25 16:47:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:47:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:47:11,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:47:11,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634668611] [2022-11-25 16:47:11,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:47:11,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:47:11,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:47:11,379 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:47:11,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:47:13,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:47:13,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:47:13,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 3726 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 16:47:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:47:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2022-11-25 16:47:14,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:47:14,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:47:14,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296819216] [2022-11-25 16:47:14,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:47:14,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634668611] [2022-11-25 16:47:14,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634668611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:47:14,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:47:14,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:47:14,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603719280] [2022-11-25 16:47:14,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:47:14,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:47:14,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:47:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:47:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:47:14,768 INFO L87 Difference]: Start difference. First operand 2657 states and 4030 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-25 16:47:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:47:26,763 INFO L93 Difference]: Finished difference Result 3007 states and 4551 transitions. [2022-11-25 16:47:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:47:26,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 167 [2022-11-25 16:47:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:47:26,779 INFO L225 Difference]: With dead ends: 3007 [2022-11-25 16:47:26,780 INFO L226 Difference]: Without dead ends: 3004 [2022-11-25 16:47:26,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:47:26,783 INFO L413 NwaCegarLoop]: 1255 mSDtfsCounter, 3569 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 2668 mSolverCounterSat, 1134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3637 SdHoareTripleChecker+Valid, 3347 SdHoareTripleChecker+Invalid, 3802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1134 IncrementalHoareTripleChecker+Valid, 2668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:47:26,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3637 Valid, 3347 Invalid, 3802 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1134 Valid, 2668 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-11-25 16:47:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3004 states. [2022-11-25 16:47:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3004 to 2997. [2022-11-25 16:47:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2363 states have (on average 1.3990689801100296) internal successors, (3306), 2390 states have internal predecessors, (3306), 527 states have call successors, (527), 100 states have call predecessors, (527), 106 states have return successors, (707), 526 states have call predecessors, (707), 524 states have call successors, (707) [2022-11-25 16:47:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 4540 transitions. [2022-11-25 16:47:26,968 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 4540 transitions. Word has length 167 [2022-11-25 16:47:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:47:26,969 INFO L495 AbstractCegarLoop]: Abstraction has 2997 states and 4540 transitions. [2022-11-25 16:47:26,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-25 16:47:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 4540 transitions. [2022-11-25 16:47:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-25 16:47:26,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:47:26,979 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:47:26,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:47:27,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 16:47:27,197 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:47:27,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:47:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1267280669, now seen corresponding path program 1 times [2022-11-25 16:47:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:47:27,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039704600] [2022-11-25 16:47:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:47:27,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:47:27,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:47:27,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544340967] [2022-11-25 16:47:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:47:27,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:47:27,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:47:27,366 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:47:27,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:47:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 3835 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:47:29,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:47:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2022-11-25 16:47:30,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:47:30,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:47:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039704600] [2022-11-25 16:47:30,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:47:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544340967] [2022-11-25 16:47:30,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544340967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:47:30,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:47:30,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:47:30,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619153925] [2022-11-25 16:47:30,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:47:30,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:47:30,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:47:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:47:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:47:30,704 INFO L87 Difference]: Start difference. First operand 2997 states and 4540 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-25 16:47:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:47:30,853 INFO L93 Difference]: Finished difference Result 2999 states and 4541 transitions. [2022-11-25 16:47:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:47:30,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 188 [2022-11-25 16:47:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:47:30,868 INFO L225 Difference]: With dead ends: 2999 [2022-11-25 16:47:30,868 INFO L226 Difference]: Without dead ends: 2996 [2022-11-25 16:47:30,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 186 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 16:47:30,872 INFO L413 NwaCegarLoop]: 1727 mSDtfsCounter, 1620 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:47:30,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1620 Valid, 1727 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:47:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2022-11-25 16:47:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2984. [2022-11-25 16:47:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2359 states have (on average 1.3993217465027554) internal successors, (3301), 2380 states have internal predecessors, (3301), 518 states have call successors, (518), 98 states have call predecessors, (518), 106 states have return successors, (699), 525 states have call predecessors, (699), 516 states have call successors, (699) [2022-11-25 16:47:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 4518 transitions. [2022-11-25 16:47:31,137 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 4518 transitions. Word has length 188 [2022-11-25 16:47:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:47:31,138 INFO L495 AbstractCegarLoop]: Abstraction has 2984 states and 4518 transitions. [2022-11-25 16:47:31,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-25 16:47:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 4518 transitions. [2022-11-25 16:47:31,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-25 16:47:31,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:47:31,169 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:47:31,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 16:47:31,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 16:47:31,383 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:47:31,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:47:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash -736395826, now seen corresponding path program 1 times [2022-11-25 16:47:31,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:47:31,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665460965] [2022-11-25 16:47:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:47:31,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:47:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:32,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:47:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:32,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:47:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:32,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:47:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:47:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:47:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 16:47:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:47:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:47:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:47:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:47:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:47:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:47:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:47:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-11-25 16:47:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-25 16:47:33,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:47:33,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665460965] [2022-11-25 16:47:33,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665460965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:47:33,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105464170] [2022-11-25 16:47:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:47:33,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:47:33,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:47:33,668 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:47:33,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:47:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:47:35,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 2355 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:47:35,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:47:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2022 trivial. 0 not checked. [2022-11-25 16:47:35,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:47:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2022-11-25 16:47:36,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105464170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:47:36,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:47:36,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 13 [2022-11-25 16:47:36,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090985141] [2022-11-25 16:47:36,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:47:36,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:47:36,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:47:36,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:47:36,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:47:36,045 INFO L87 Difference]: Start difference. First operand 2984 states and 4518 transitions. Second operand has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-25 16:47:40,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:47:42,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:48:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:48:04,814 INFO L93 Difference]: Finished difference Result 6293 states and 9828 transitions. [2022-11-25 16:48:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 16:48:04,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 255 [2022-11-25 16:48:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:48:04,839 INFO L225 Difference]: With dead ends: 6293 [2022-11-25 16:48:04,839 INFO L226 Difference]: Without dead ends: 3700 [2022-11-25 16:48:04,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2022-11-25 16:48:04,851 INFO L413 NwaCegarLoop]: 1410 mSDtfsCounter, 4235 mSDsluCounter, 6779 mSDsCounter, 0 mSdLazyCounter, 5096 mSolverCounterSat, 1716 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4313 SdHoareTripleChecker+Valid, 8189 SdHoareTripleChecker+Invalid, 6814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1716 IncrementalHoareTripleChecker+Valid, 5096 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:48:04,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4313 Valid, 8189 Invalid, 6814 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1716 Valid, 5096 Invalid, 2 Unknown, 0 Unchecked, 26.2s Time] [2022-11-25 16:48:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3700 states. [2022-11-25 16:48:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3700 to 3046. [2022-11-25 16:48:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 2413 states have (on average 1.397430584334853) internal successors, (3372), 2433 states have internal predecessors, (3372), 526 states have call successors, (526), 98 states have call predecessors, (526), 106 states have return successors, (715), 534 states have call predecessors, (715), 524 states have call successors, (715) [2022-11-25 16:48:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 4613 transitions. [2022-11-25 16:48:05,090 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 4613 transitions. Word has length 255 [2022-11-25 16:48:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:48:05,091 INFO L495 AbstractCegarLoop]: Abstraction has 3046 states and 4613 transitions. [2022-11-25 16:48:05,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-25 16:48:05,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 4613 transitions. [2022-11-25 16:48:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-11-25 16:48:05,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:48:05,115 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:48:05,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:48:05,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 16:48:05,329 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:48:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:48:05,329 INFO L85 PathProgramCache]: Analyzing trace with hash 325000417, now seen corresponding path program 1 times [2022-11-25 16:48:05,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:48:05,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546025278] [2022-11-25 16:48:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:05,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:48:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:48:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:48:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:48:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:48:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:48:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 16:48:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:48:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:48:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:48:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:05,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:48:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:06,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:48:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:06,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:48:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:06,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:48:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:06,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-11-25 16:48:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2055 trivial. 0 not checked. [2022-11-25 16:48:06,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:48:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546025278] [2022-11-25 16:48:06,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546025278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:48:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524462542] [2022-11-25 16:48:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:06,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:48:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:48:06,025 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:48:06,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:48:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 2394 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:48:07,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:48:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 2022 trivial. 0 not checked. [2022-11-25 16:48:07,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:48:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2022-11-25 16:48:08,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524462542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:48:08,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:48:08,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-25 16:48:08,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126951334] [2022-11-25 16:48:08,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:48:08,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 16:48:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:48:08,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 16:48:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:48:08,758 INFO L87 Difference]: Start difference. First operand 3046 states and 4613 transitions. Second operand has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-25 16:48:12,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:48:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:48:30,865 INFO L93 Difference]: Finished difference Result 6500 states and 10160 transitions. [2022-11-25 16:48:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 16:48:30,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 267 [2022-11-25 16:48:30,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:48:30,891 INFO L225 Difference]: With dead ends: 6500 [2022-11-25 16:48:30,892 INFO L226 Difference]: Without dead ends: 3845 [2022-11-25 16:48:30,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2022-11-25 16:48:30,906 INFO L413 NwaCegarLoop]: 1430 mSDtfsCounter, 2418 mSDsluCounter, 5338 mSDsCounter, 0 mSdLazyCounter, 4445 mSolverCounterSat, 1283 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2541 SdHoareTripleChecker+Valid, 6768 SdHoareTripleChecker+Invalid, 5729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1283 IncrementalHoareTripleChecker+Valid, 4445 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:48:30,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2541 Valid, 6768 Invalid, 5729 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1283 Valid, 4445 Invalid, 1 Unknown, 0 Unchecked, 20.9s Time] [2022-11-25 16:48:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3845 states. [2022-11-25 16:48:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3845 to 3182. [2022-11-25 16:48:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 2529 states have (on average 1.394226967180704) internal successors, (3526), 2550 states have internal predecessors, (3526), 546 states have call successors, (546), 98 states have call predecessors, (546), 106 states have return successors, (755), 553 states have call predecessors, (755), 544 states have call successors, (755) [2022-11-25 16:48:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 4827 transitions. [2022-11-25 16:48:31,265 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 4827 transitions. Word has length 267 [2022-11-25 16:48:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:48:31,266 INFO L495 AbstractCegarLoop]: Abstraction has 3182 states and 4827 transitions. [2022-11-25 16:48:31,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-25 16:48:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 4827 transitions. [2022-11-25 16:48:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-25 16:48:31,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:48:31,305 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:48:31,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 16:48:31,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:48:31,523 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:48:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:48:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1058759624, now seen corresponding path program 1 times [2022-11-25 16:48:31,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:48:31,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768760507] [2022-11-25 16:48:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:31,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:48:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:48:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:48:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:48:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:48:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:48:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-25 16:48:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-25 16:48:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:48:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:48:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:31,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:48:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:32,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:48:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:32,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:48:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:32,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:48:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:32,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:48:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:32,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-11-25 16:48:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-11-25 16:48:32,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:48:32,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768760507] [2022-11-25 16:48:32,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768760507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:48:32,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:48:32,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:48:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515762781] [2022-11-25 16:48:32,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:48:32,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:48:32,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:48:32,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:48:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:48:32,071 INFO L87 Difference]: Start difference. First operand 3182 states and 4827 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:48:35,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:48:37,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:48:49,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:48:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:48:54,181 INFO L93 Difference]: Finished difference Result 6623 states and 10336 transitions. [2022-11-25 16:48:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:48:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 262 [2022-11-25 16:48:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:48:54,201 INFO L225 Difference]: With dead ends: 6623 [2022-11-25 16:48:54,201 INFO L226 Difference]: Without dead ends: 3832 [2022-11-25 16:48:54,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:48:54,215 INFO L413 NwaCegarLoop]: 1396 mSDtfsCounter, 1355 mSDsluCounter, 3128 mSDsCounter, 0 mSdLazyCounter, 3421 mSolverCounterSat, 490 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 3914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 3421 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:48:54,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 4524 Invalid, 3914 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [490 Valid, 3421 Invalid, 3 Unknown, 0 Unchecked, 21.6s Time] [2022-11-25 16:48:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2022-11-25 16:48:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 3182. [2022-11-25 16:48:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 2529 states have (on average 1.3918544879398973) internal successors, (3520), 2550 states have internal predecessors, (3520), 546 states have call successors, (546), 98 states have call predecessors, (546), 106 states have return successors, (755), 553 states have call predecessors, (755), 544 states have call successors, (755) [2022-11-25 16:48:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 4821 transitions. [2022-11-25 16:48:54,495 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 4821 transitions. Word has length 262 [2022-11-25 16:48:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:48:54,496 INFO L495 AbstractCegarLoop]: Abstraction has 3182 states and 4821 transitions. [2022-11-25 16:48:54,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:48:54,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 4821 transitions. [2022-11-25 16:48:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-25 16:48:54,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:48:54,524 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:48:54,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 16:48:54,525 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:48:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:48:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1946485603, now seen corresponding path program 1 times [2022-11-25 16:48:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:48:54,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056754350] [2022-11-25 16:48:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:54,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:48:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:54,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:48:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:54,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:48:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:54,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:48:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:48:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:48:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-25 16:48:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 16:48:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:48:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:48:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:48:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:48:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:48:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:48:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:48:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-11-25 16:48:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2022-11-25 16:48:55,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:48:55,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056754350] [2022-11-25 16:48:55,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056754350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:48:55,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304633833] [2022-11-25 16:48:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:55,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:48:55,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:48:55,875 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:48:55,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 16:48:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 2356 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 16:48:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:48:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2022-11-25 16:48:57,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:48:57,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304633833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:48:57,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:48:57,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2022-11-25 16:48:57,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823389159] [2022-11-25 16:48:57,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:48:57,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:48:57,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:48:57,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:48:57,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:48:57,544 INFO L87 Difference]: Start difference. First operand 3182 states and 4821 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:48:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:48:57,840 INFO L93 Difference]: Finished difference Result 6033 states and 9159 transitions. [2022-11-25 16:48:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:48:57,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 264 [2022-11-25 16:48:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:48:57,859 INFO L225 Difference]: With dead ends: 6033 [2022-11-25 16:48:57,860 INFO L226 Difference]: Without dead ends: 3242 [2022-11-25 16:48:57,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:48:57,872 INFO L413 NwaCegarLoop]: 1729 mSDtfsCounter, 19 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:48:57,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3444 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:48:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2022-11-25 16:48:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 3188. [2022-11-25 16:48:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 2535 states have (on average 1.3909270216962524) internal successors, (3526), 2556 states have internal predecessors, (3526), 546 states have call successors, (546), 98 states have call predecessors, (546), 106 states have return successors, (755), 553 states have call predecessors, (755), 544 states have call successors, (755) [2022-11-25 16:48:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 4827 transitions. [2022-11-25 16:48:58,110 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 4827 transitions. Word has length 264 [2022-11-25 16:48:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:48:58,111 INFO L495 AbstractCegarLoop]: Abstraction has 3188 states and 4827 transitions. [2022-11-25 16:48:58,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:48:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 4827 transitions. [2022-11-25 16:48:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-25 16:48:58,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:48:58,138 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:48:58,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 16:48:58,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:48:58,354 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:48:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:48:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash 309876136, now seen corresponding path program 1 times [2022-11-25 16:48:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:48:58,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696621703] [2022-11-25 16:48:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:58,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:48:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:58,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:48:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:58,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:48:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:58,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:48:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:59,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:48:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:59,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:48:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:59,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-25 16:48:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:59,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 16:48:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:59,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:48:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:00,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:49:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:00,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:49:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:00,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:49:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:00,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:49:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:00,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:49:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:49:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:00,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2022-11-25 16:49:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2022-11-25 16:49:00,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:49:00,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696621703] [2022-11-25 16:49:00,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696621703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:00,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396068865] [2022-11-25 16:49:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:00,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:00,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:00,283 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:49:00,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 16:49:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:01,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 2375 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:49:01,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:49:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2022-11-25 16:49:02,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:49:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-11-25 16:49:02,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396068865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:49:02,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:49:02,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 16 [2022-11-25 16:49:02,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494336514] [2022-11-25 16:49:02,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:49:02,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 16:49:02,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:49:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 16:49:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-25 16:49:02,569 INFO L87 Difference]: Start difference. First operand 3188 states and 4827 transitions. Second operand has 16 states, 15 states have (on average 11.666666666666666) internal successors, (175), 12 states have internal predecessors, (175), 5 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) [2022-11-25 16:49:08,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:49:10,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:49:12,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:49:14,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:49:47,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:49:49,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:50:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:50:03,728 INFO L93 Difference]: Finished difference Result 7114 states and 11437 transitions. [2022-11-25 16:50:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 16:50:03,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 11.666666666666666) internal successors, (175), 12 states have internal predecessors, (175), 5 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) Word has length 268 [2022-11-25 16:50:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:50:03,752 INFO L225 Difference]: With dead ends: 7114 [2022-11-25 16:50:03,753 INFO L226 Difference]: Without dead ends: 4317 [2022-11-25 16:50:03,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 16:50:03,764 INFO L413 NwaCegarLoop]: 1381 mSDtfsCounter, 5323 mSDsluCounter, 11991 mSDsCounter, 0 mSdLazyCounter, 11567 mSolverCounterSat, 2990 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5407 SdHoareTripleChecker+Valid, 13372 SdHoareTripleChecker+Invalid, 14563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2990 IncrementalHoareTripleChecker+Valid, 11567 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:50:03,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5407 Valid, 13372 Invalid, 14563 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2990 Valid, 11567 Invalid, 6 Unknown, 0 Unchecked, 57.5s Time] [2022-11-25 16:50:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4317 states. [2022-11-25 16:50:04,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4317 to 3393. [2022-11-25 16:50:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2705 states have (on average 1.3807763401109057) internal successors, (3735), 2726 states have internal predecessors, (3735), 578 states have call successors, (578), 98 states have call predecessors, (578), 109 states have return successors, (848), 588 states have call predecessors, (848), 576 states have call successors, (848) [2022-11-25 16:50:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 5161 transitions. [2022-11-25 16:50:04,034 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 5161 transitions. Word has length 268 [2022-11-25 16:50:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:50:04,034 INFO L495 AbstractCegarLoop]: Abstraction has 3393 states and 5161 transitions. [2022-11-25 16:50:04,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 11.666666666666666) internal successors, (175), 12 states have internal predecessors, (175), 5 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) [2022-11-25 16:50:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 5161 transitions. [2022-11-25 16:50:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-11-25 16:50:04,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:50:04,056 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 19, 19, 18, 18, 10, 10, 10, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:04,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-25 16:50:04,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 16:50:04,268 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:50:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:04,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1578255755, now seen corresponding path program 1 times [2022-11-25 16:50:04,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:04,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295254780] [2022-11-25 16:50:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:04,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:04,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:50:04,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150578468] [2022-11-25 16:50:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:04,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:50:04,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:50:04,443 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:50:04,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 16:50:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:06,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 5855 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:50:06,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:50:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2416 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 2064 trivial. 0 not checked. [2022-11-25 16:50:07,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:50:07,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:07,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295254780] [2022-11-25 16:50:07,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:50:07,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150578468] [2022-11-25 16:50:07,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150578468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:07,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:50:07,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 16:50:07,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003528543] [2022-11-25 16:50:07,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:07,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:50:07,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:07,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:50:07,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:50:07,143 INFO L87 Difference]: Start difference. First operand 3393 states and 5161 transitions. Second operand has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) [2022-11-25 16:50:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:50:07,845 INFO L93 Difference]: Finished difference Result 5653 states and 8705 transitions. [2022-11-25 16:50:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:50:07,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) Word has length 590 [2022-11-25 16:50:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:50:07,863 INFO L225 Difference]: With dead ends: 5653 [2022-11-25 16:50:07,864 INFO L226 Difference]: Without dead ends: 3409 [2022-11-25 16:50:07,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:50:07,878 INFO L413 NwaCegarLoop]: 1735 mSDtfsCounter, 6 mSDsluCounter, 12103 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13838 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:50:07,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 13838 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:50:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2022-11-25 16:50:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3398. [2022-11-25 16:50:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 2709 states have (on average 1.3802141011443336) internal successors, (3739), 2730 states have internal predecessors, (3739), 578 states have call successors, (578), 98 states have call predecessors, (578), 110 states have return successors, (864), 589 states have call predecessors, (864), 576 states have call successors, (864) [2022-11-25 16:50:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 5181 transitions. [2022-11-25 16:50:08,122 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 5181 transitions. Word has length 590 [2022-11-25 16:50:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:50:08,125 INFO L495 AbstractCegarLoop]: Abstraction has 3398 states and 5181 transitions. [2022-11-25 16:50:08,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) [2022-11-25 16:50:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 5181 transitions. [2022-11-25 16:50:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-11-25 16:50:08,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:50:08,147 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 17, 17, 16, 16, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:08,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 16:50:08,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 16:50:08,369 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:50:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:08,369 INFO L85 PathProgramCache]: Analyzing trace with hash -676433585, now seen corresponding path program 1 times [2022-11-25 16:50:08,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:08,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183065137] [2022-11-25 16:50:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:08,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:08,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:50:08,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304502181] [2022-11-25 16:50:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:08,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:50:08,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:50:08,551 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:50:08,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 16:50:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:10,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 5589 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 16:50:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:50:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 144 proven. 91 refuted. 0 times theorem prover too weak. 1825 trivial. 0 not checked. [2022-11-25 16:50:12,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:50:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 42 proven. 10 refuted. 0 times theorem prover too weak. 2008 trivial. 0 not checked. [2022-11-25 16:50:15,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:15,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183065137] [2022-11-25 16:50:15,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:50:15,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304502181] [2022-11-25 16:50:15,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304502181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:50:15,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:50:15,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2022-11-25 16:50:15,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494882534] [2022-11-25 16:50:15,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:50:15,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:50:15,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:50:15,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:50:15,785 INFO L87 Difference]: Start difference. First operand 3398 states and 5181 transitions. Second operand has 13 states, 13 states have (on average 16.153846153846153) internal successors, (210), 13 states have internal predecessors, (210), 8 states have call successors, (66), 8 states have call predecessors, (66), 10 states have return successors, (65), 7 states have call predecessors, (65), 7 states have call successors, (65) [2022-11-25 16:50:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:50:25,890 INFO L93 Difference]: Finished difference Result 3593 states and 5460 transitions. [2022-11-25 16:50:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:50:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.153846153846153) internal successors, (210), 13 states have internal predecessors, (210), 8 states have call successors, (66), 8 states have call predecessors, (66), 10 states have return successors, (65), 7 states have call predecessors, (65), 7 states have call successors, (65) Word has length 531 [2022-11-25 16:50:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:50:25,977 INFO L225 Difference]: With dead ends: 3593 [2022-11-25 16:50:25,977 INFO L226 Difference]: Without dead ends: 3590 [2022-11-25 16:50:25,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1067 GetRequests, 1047 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:50:25,980 INFO L413 NwaCegarLoop]: 1198 mSDtfsCounter, 6440 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 2652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6447 SdHoareTripleChecker+Valid, 2914 SdHoareTripleChecker+Invalid, 5055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2652 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:50:25,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6447 Valid, 2914 Invalid, 5055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2652 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-25 16:50:25,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2022-11-25 16:50:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 3530. [2022-11-25 16:50:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 2817 states have (on average 1.3858714944976926) internal successors, (3904), 2836 states have internal predecessors, (3904), 587 states have call successors, (587), 111 states have call predecessors, (587), 125 states have return successors, (875), 603 states have call predecessors, (875), 586 states have call successors, (875) [2022-11-25 16:50:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 5366 transitions. [2022-11-25 16:50:26,238 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 5366 transitions. Word has length 531 [2022-11-25 16:50:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:50:26,239 INFO L495 AbstractCegarLoop]: Abstraction has 3530 states and 5366 transitions. [2022-11-25 16:50:26,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.153846153846153) internal successors, (210), 13 states have internal predecessors, (210), 8 states have call successors, (66), 8 states have call predecessors, (66), 10 states have return successors, (65), 7 states have call predecessors, (65), 7 states have call successors, (65) [2022-11-25 16:50:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 5366 transitions. [2022-11-25 16:50:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-25 16:50:26,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:50:26,257 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:26,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 16:50:26,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:50:26,472 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:50:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash -851096908, now seen corresponding path program 1 times [2022-11-25 16:50:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:26,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129330630] [2022-11-25 16:50:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:26,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:50:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:50:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:50:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:50:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:50:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:50:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:50:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:50:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:50:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:50:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:50:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-11-25 16:50:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-11-25 16:50:26,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:26,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129330630] [2022-11-25 16:50:26,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129330630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:26,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:50:26,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:50:26,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269009025] [2022-11-25 16:50:26,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:26,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:50:26,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:26,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:50:26,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:50:26,938 INFO L87 Difference]: Start difference. First operand 3530 states and 5366 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:50:30,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:50:40,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:50:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:50:44,195 INFO L93 Difference]: Finished difference Result 7676 states and 12097 transitions. [2022-11-25 16:50:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:50:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 260 [2022-11-25 16:50:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:50:44,221 INFO L225 Difference]: With dead ends: 7676 [2022-11-25 16:50:44,221 INFO L226 Difference]: Without dead ends: 4537 [2022-11-25 16:50:44,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:50:44,234 INFO L413 NwaCegarLoop]: 1402 mSDtfsCounter, 1467 mSDsluCounter, 3148 mSDsCounter, 0 mSdLazyCounter, 2968 mSolverCounterSat, 481 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 4550 SdHoareTripleChecker+Invalid, 3451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 2968 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:50:44,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1576 Valid, 4550 Invalid, 3451 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [481 Valid, 2968 Invalid, 2 Unknown, 0 Unchecked, 16.7s Time] [2022-11-25 16:50:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2022-11-25 16:50:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 3530. [2022-11-25 16:50:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 2817 states have (on average 1.3837415690450834) internal successors, (3898), 2836 states have internal predecessors, (3898), 587 states have call successors, (587), 111 states have call predecessors, (587), 125 states have return successors, (875), 603 states have call predecessors, (875), 586 states have call successors, (875) [2022-11-25 16:50:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 5360 transitions. [2022-11-25 16:50:44,531 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 5360 transitions. Word has length 260 [2022-11-25 16:50:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:50:44,531 INFO L495 AbstractCegarLoop]: Abstraction has 3530 states and 5360 transitions. [2022-11-25 16:50:44,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:50:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 5360 transitions. [2022-11-25 16:50:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-25 16:50:44,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:50:44,550 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:44,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 16:50:44,550 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:50:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:44,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1046064318, now seen corresponding path program 1 times [2022-11-25 16:50:44,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:44,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501883058] [2022-11-25 16:50:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:44,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:44,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:50:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:50:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:44,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:50:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:50:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:50:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:50:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:50:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:50:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:50:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:50:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:50:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-11-25 16:50:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-25 16:50:45,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:45,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501883058] [2022-11-25 16:50:45,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501883058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:50:45,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956990963] [2022-11-25 16:50:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:45,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:50:45,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:50:45,791 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:50:45,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 16:50:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:47,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:50:47,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:50:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:50:47,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:50:47,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956990963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:47,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:50:47,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 11 [2022-11-25 16:50:47,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231694951] [2022-11-25 16:50:47,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:47,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:50:47,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:47,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:50:47,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:50:47,552 INFO L87 Difference]: Start difference. First operand 3530 states and 5360 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:50:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:50:47,835 INFO L93 Difference]: Finished difference Result 6905 states and 10560 transitions. [2022-11-25 16:50:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:50:47,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 260 [2022-11-25 16:50:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:50:47,855 INFO L225 Difference]: With dead ends: 6905 [2022-11-25 16:50:47,855 INFO L226 Difference]: Without dead ends: 3766 [2022-11-25 16:50:47,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:50:47,865 INFO L413 NwaCegarLoop]: 1739 mSDtfsCounter, 93 mSDsluCounter, 3450 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5189 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:50:47,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 5189 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:50:47,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2022-11-25 16:50:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3542. [2022-11-25 16:50:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3542 states, 2829 states have (on average 1.3842347119123366) internal successors, (3916), 2848 states have internal predecessors, (3916), 587 states have call successors, (587), 111 states have call predecessors, (587), 125 states have return successors, (875), 603 states have call predecessors, (875), 586 states have call successors, (875) [2022-11-25 16:50:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3542 states to 3542 states and 5378 transitions. [2022-11-25 16:50:48,203 INFO L78 Accepts]: Start accepts. Automaton has 3542 states and 5378 transitions. Word has length 260 [2022-11-25 16:50:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:50:48,203 INFO L495 AbstractCegarLoop]: Abstraction has 3542 states and 5378 transitions. [2022-11-25 16:50:48,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:50:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3542 states and 5378 transitions. [2022-11-25 16:50:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-25 16:50:48,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:50:48,224 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:48,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 16:50:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 16:50:48,445 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:50:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:48,445 INFO L85 PathProgramCache]: Analyzing trace with hash 520693632, now seen corresponding path program 1 times [2022-11-25 16:50:48,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:48,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544554868] [2022-11-25 16:50:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:48,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:48,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:50:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:48,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:50:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:48,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:50:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:50:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:50:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 16:50:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:50:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:50:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:50:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:50:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:50:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-11-25 16:50:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-25 16:50:49,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:49,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544554868] [2022-11-25 16:50:49,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544554868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:50:49,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814225367] [2022-11-25 16:50:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:49,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:50:49,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:50:49,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:50:49,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 16:50:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 2212 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:50:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:50:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:50:51,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:50:51,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814225367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:51,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:50:51,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 11 [2022-11-25 16:50:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511997959] [2022-11-25 16:50:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:50:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:50:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:50:51,413 INFO L87 Difference]: Start difference. First operand 3542 states and 5378 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:50:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:50:51,763 INFO L93 Difference]: Finished difference Result 6929 states and 10594 transitions. [2022-11-25 16:50:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:50:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 260 [2022-11-25 16:50:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:50:51,840 INFO L225 Difference]: With dead ends: 6929 [2022-11-25 16:50:51,841 INFO L226 Difference]: Without dead ends: 3778 [2022-11-25 16:50:51,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:50:51,853 INFO L413 NwaCegarLoop]: 1815 mSDtfsCounter, 88 mSDsluCounter, 3543 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5358 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:50:51,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 5358 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:50:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2022-11-25 16:50:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3556. [2022-11-25 16:50:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 2843 states have (on average 1.3844530425606754) internal successors, (3936), 2862 states have internal predecessors, (3936), 587 states have call successors, (587), 111 states have call predecessors, (587), 125 states have return successors, (875), 603 states have call predecessors, (875), 586 states have call successors, (875) [2022-11-25 16:50:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 5398 transitions. [2022-11-25 16:50:52,118 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 5398 transitions. Word has length 260 [2022-11-25 16:50:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:50:52,120 INFO L495 AbstractCegarLoop]: Abstraction has 3556 states and 5398 transitions. [2022-11-25 16:50:52,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:50:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 5398 transitions. [2022-11-25 16:50:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-25 16:50:52,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:50:52,140 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:52,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 16:50:52,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 16:50:52,360 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:50:52,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1562944924, now seen corresponding path program 1 times [2022-11-25 16:50:52,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:52,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287616678] [2022-11-25 16:50:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:52,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:50:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:50:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:52,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:50:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:50:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:50:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 16:50:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:50:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:50:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:50:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:50:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:50:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-11-25 16:50:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-25 16:50:53,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:53,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287616678] [2022-11-25 16:50:53,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287616678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:50:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951555840] [2022-11-25 16:50:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:53,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:50:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:50:53,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:50:53,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 16:50:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:55,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:50:55,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:50:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:50:55,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:50:55,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951555840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:50:55,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:50:55,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 12 [2022-11-25 16:50:55,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102694180] [2022-11-25 16:50:55,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:50:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:50:55,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:50:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:50:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:50:55,409 INFO L87 Difference]: Start difference. First operand 3556 states and 5398 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:50:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:50:55,894 INFO L93 Difference]: Finished difference Result 6755 states and 10268 transitions. [2022-11-25 16:50:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:50:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 264 [2022-11-25 16:50:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:50:55,915 INFO L225 Difference]: With dead ends: 6755 [2022-11-25 16:50:55,915 INFO L226 Difference]: Without dead ends: 3590 [2022-11-25 16:50:55,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:50:55,928 INFO L413 NwaCegarLoop]: 1726 mSDtfsCounter, 152 mSDsluCounter, 5043 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 6769 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:50:55,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 6769 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:50:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2022-11-25 16:50:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 3556. [2022-11-25 16:50:56,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 2843 states have (on average 1.383397819205065) internal successors, (3933), 2862 states have internal predecessors, (3933), 587 states have call successors, (587), 111 states have call predecessors, (587), 125 states have return successors, (875), 603 states have call predecessors, (875), 586 states have call successors, (875) [2022-11-25 16:50:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 5395 transitions. [2022-11-25 16:50:56,149 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 5395 transitions. Word has length 264 [2022-11-25 16:50:56,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:50:56,150 INFO L495 AbstractCegarLoop]: Abstraction has 3556 states and 5395 transitions. [2022-11-25 16:50:56,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:50:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 5395 transitions. [2022-11-25 16:50:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-25 16:50:56,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:50:56,169 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:56,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 16:50:56,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 16:50:56,383 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:50:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:56,383 INFO L85 PathProgramCache]: Analyzing trace with hash -124508143, now seen corresponding path program 1 times [2022-11-25 16:50:56,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:56,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141768552] [2022-11-25 16:50:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:56,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:57,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:50:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:57,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:50:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:57,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:50:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:58,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:58,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:50:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:58,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:50:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:58,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 16:50:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:58,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:50:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:58,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:50:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:59,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:50:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:59,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:50:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:59,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:50:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:59,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:50:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:59,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-11-25 16:50:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2022-11-25 16:50:59,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:59,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141768552] [2022-11-25 16:50:59,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141768552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:50:59,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109835493] [2022-11-25 16:50:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:59,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:50:59,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:50:59,137 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:50:59,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 16:51:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:01,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 2240 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:51:01,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:51:01,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:51:01,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109835493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:51:01,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:51:01,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-11-25 16:51:01,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854907777] [2022-11-25 16:51:01,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:51:01,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 16:51:01,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:01,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 16:51:01,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-25 16:51:01,858 INFO L87 Difference]: Start difference. First operand 3556 states and 5395 transitions. Second operand has 20 states, 19 states have (on average 8.473684210526315) internal successors, (161), 16 states have internal predecessors, (161), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-25 16:51:07,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:51:09,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:51:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:51:51,804 INFO L93 Difference]: Finished difference Result 8203 states and 13040 transitions. [2022-11-25 16:51:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 16:51:51,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 8.473684210526315) internal successors, (161), 16 states have internal predecessors, (161), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 262 [2022-11-25 16:51:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:51:51,826 INFO L225 Difference]: With dead ends: 8203 [2022-11-25 16:51:51,826 INFO L226 Difference]: Without dead ends: 5038 [2022-11-25 16:51:51,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 16:51:51,836 INFO L413 NwaCegarLoop]: 1483 mSDtfsCounter, 5837 mSDsluCounter, 15075 mSDsCounter, 0 mSdLazyCounter, 10546 mSolverCounterSat, 2959 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5928 SdHoareTripleChecker+Valid, 16558 SdHoareTripleChecker+Invalid, 13507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2959 IncrementalHoareTripleChecker+Valid, 10546 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:51:51,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5928 Valid, 16558 Invalid, 13507 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2959 Valid, 10546 Invalid, 2 Unknown, 0 Unchecked, 43.6s Time] [2022-11-25 16:51:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5038 states. [2022-11-25 16:51:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5038 to 3797. [2022-11-25 16:51:52,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3029 states have (on average 1.3809838230439089) internal successors, (4183), 3044 states have internal predecessors, (4183), 642 states have call successors, (642), 111 states have call predecessors, (642), 125 states have return successors, (985), 662 states have call predecessors, (985), 641 states have call successors, (985) [2022-11-25 16:51:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 5810 transitions. [2022-11-25 16:51:52,182 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 5810 transitions. Word has length 262 [2022-11-25 16:51:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:51:52,182 INFO L495 AbstractCegarLoop]: Abstraction has 3797 states and 5810 transitions. [2022-11-25 16:51:52,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 8.473684210526315) internal successors, (161), 16 states have internal predecessors, (161), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-25 16:51:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 5810 transitions. [2022-11-25 16:51:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-25 16:51:52,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:51:52,196 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:51:52,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 16:51:52,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 16:51:52,397 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:51:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:51:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash 686739687, now seen corresponding path program 1 times [2022-11-25 16:51:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:51:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131568846] [2022-11-25 16:51:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:52,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:51:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:53,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:51:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:53,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:51:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:53,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:51:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:54,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:51:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:51:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:54,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:51:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:54,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 16:51:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:55,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:51:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:55,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:51:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:55,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:51:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:55,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:51:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:55,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:51:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:55,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:51:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:55,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-11-25 16:51:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2089 trivial. 0 not checked. [2022-11-25 16:51:55,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:51:55,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131568846] [2022-11-25 16:51:55,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131568846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:51:55,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183063879] [2022-11-25 16:51:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:51:55,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:51:55,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:51:55,223 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:51:55,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 16:51:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:51:57,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2273 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:51:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:51:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:51:57,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:51:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:51:59,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183063879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:51:59,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:51:59,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-11-25 16:51:59,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728150280] [2022-11-25 16:51:59,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:51:59,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 16:51:59,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:51:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 16:51:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-11-25 16:51:59,072 INFO L87 Difference]: Start difference. First operand 3797 states and 5810 transitions. Second operand has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 25 states have internal predecessors, (193), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-25 16:52:05,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:52:07,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:52:52,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:53:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:53:07,905 INFO L93 Difference]: Finished difference Result 8814 states and 14139 transitions. [2022-11-25 16:53:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 16:53:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 25 states have internal predecessors, (193), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 278 [2022-11-25 16:53:07,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:53:07,934 INFO L225 Difference]: With dead ends: 8814 [2022-11-25 16:53:07,934 INFO L226 Difference]: Without dead ends: 5408 [2022-11-25 16:53:07,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=617, Invalid=3289, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 16:53:07,948 INFO L413 NwaCegarLoop]: 1488 mSDtfsCounter, 4711 mSDsluCounter, 18300 mSDsCounter, 0 mSdLazyCounter, 14947 mSolverCounterSat, 2062 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4818 SdHoareTripleChecker+Valid, 19788 SdHoareTripleChecker+Invalid, 17012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 14947 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:53:07,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4818 Valid, 19788 Invalid, 17012 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2062 Valid, 14947 Invalid, 3 Unknown, 0 Unchecked, 61.3s Time] [2022-11-25 16:53:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5408 states. [2022-11-25 16:53:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5408 to 3897. [2022-11-25 16:53:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3113 states have (on average 1.3764857051076131) internal successors, (4285), 3128 states have internal predecessors, (4285), 658 states have call successors, (658), 111 states have call predecessors, (658), 125 states have return successors, (1017), 678 states have call predecessors, (1017), 657 states have call successors, (1017) [2022-11-25 16:53:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 5960 transitions. [2022-11-25 16:53:08,335 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 5960 transitions. Word has length 278 [2022-11-25 16:53:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:53:08,335 INFO L495 AbstractCegarLoop]: Abstraction has 3897 states and 5960 transitions. [2022-11-25 16:53:08,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 25 states have internal predecessors, (193), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-25 16:53:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 5960 transitions. [2022-11-25 16:53:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-25 16:53:08,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:53:08,358 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 14, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:53:08,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 16:53:08,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:53:08,579 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:53:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:53:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash 571249920, now seen corresponding path program 1 times [2022-11-25 16:53:08,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:53:08,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043440559] [2022-11-25 16:53:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:53:08,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:53:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:08,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:53:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:08,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:53:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:53:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:53:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:53:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:53:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 16:53:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:53:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:53:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:53:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:53:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:53:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:53:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-11-25 16:53:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2022-11-25 16:53:09,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:53:09,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043440559] [2022-11-25 16:53:09,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043440559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:53:09,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123284857] [2022-11-25 16:53:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:53:09,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:53:09,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:53:09,980 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:53:09,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 16:53:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:53:11,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:53:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-11-25 16:53:12,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:53:12,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123284857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:53:12,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:53:12,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-25 16:53:12,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106944852] [2022-11-25 16:53:12,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:53:12,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:53:12,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:53:12,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:53:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:53:12,057 INFO L87 Difference]: Start difference. First operand 3897 states and 5960 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:53:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:53:12,632 INFO L93 Difference]: Finished difference Result 7603 states and 11673 transitions. [2022-11-25 16:53:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:53:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 311 [2022-11-25 16:53:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:53:12,659 INFO L225 Difference]: With dead ends: 7603 [2022-11-25 16:53:12,659 INFO L226 Difference]: Without dead ends: 4097 [2022-11-25 16:53:12,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:53:12,675 INFO L413 NwaCegarLoop]: 1812 mSDtfsCounter, 118 mSDsluCounter, 3431 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 5243 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:53:12,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 5243 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:53:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2022-11-25 16:53:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3949. [2022-11-25 16:53:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3154 states have (on average 1.376981610653139) internal successors, (4343), 3165 states have internal predecessors, (4343), 669 states have call successors, (669), 111 states have call predecessors, (669), 125 states have return successors, (1039), 693 states have call predecessors, (1039), 668 states have call successors, (1039) [2022-11-25 16:53:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 6051 transitions. [2022-11-25 16:53:12,916 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 6051 transitions. Word has length 311 [2022-11-25 16:53:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:53:12,917 INFO L495 AbstractCegarLoop]: Abstraction has 3949 states and 6051 transitions. [2022-11-25 16:53:12,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:53:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 6051 transitions. [2022-11-25 16:53:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-25 16:53:12,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:53:12,938 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 14, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:53:12,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 16:53:13,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:53:13,139 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:53:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:53:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash -962624578, now seen corresponding path program 1 times [2022-11-25 16:53:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:53:13,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122733178] [2022-11-25 16:53:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:53:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:53:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:53:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:53:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:53:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:53:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:53:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:53:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 16:53:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:53:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:53:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:53:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:53:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:53:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:53:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2022-11-25 16:53:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2022-11-25 16:53:13,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:53:13,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122733178] [2022-11-25 16:53:13,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122733178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:53:13,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:53:13,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 16:53:13,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514309916] [2022-11-25 16:53:13,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:53:13,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:53:13,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:53:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:53:13,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:53:13,889 INFO L87 Difference]: Start difference. First operand 3949 states and 6051 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:53:17,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:53:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:53:29,115 INFO L93 Difference]: Finished difference Result 8409 states and 13309 transitions. [2022-11-25 16:53:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:53:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 314 [2022-11-25 16:53:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:53:29,135 INFO L225 Difference]: With dead ends: 8409 [2022-11-25 16:53:29,136 INFO L226 Difference]: Without dead ends: 4851 [2022-11-25 16:53:29,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:53:29,152 INFO L413 NwaCegarLoop]: 1426 mSDtfsCounter, 2393 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 1205 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2505 SdHoareTripleChecker+Valid, 5385 SdHoareTripleChecker+Invalid, 4223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:53:29,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2505 Valid, 5385 Invalid, 4223 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1205 Valid, 3017 Invalid, 1 Unknown, 0 Unchecked, 14.5s Time] [2022-11-25 16:53:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2022-11-25 16:53:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 3965. [2022-11-25 16:53:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3965 states, 3170 states have (on average 1.3769716088328077) internal successors, (4365), 3181 states have internal predecessors, (4365), 669 states have call successors, (669), 111 states have call predecessors, (669), 125 states have return successors, (1039), 693 states have call predecessors, (1039), 668 states have call successors, (1039) [2022-11-25 16:53:29,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3965 states to 3965 states and 6073 transitions. [2022-11-25 16:53:29,413 INFO L78 Accepts]: Start accepts. Automaton has 3965 states and 6073 transitions. Word has length 314 [2022-11-25 16:53:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:53:29,414 INFO L495 AbstractCegarLoop]: Abstraction has 3965 states and 6073 transitions. [2022-11-25 16:53:29,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 16:53:29,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3965 states and 6073 transitions. [2022-11-25 16:53:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-11-25 16:53:29,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:53:29,433 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 14, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:53:29,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 16:53:29,433 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:53:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:53:29,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1211630161, now seen corresponding path program 1 times [2022-11-25 16:53:29,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:53:29,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765447799] [2022-11-25 16:53:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:53:29,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:53:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:30,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:53:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:30,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:53:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:30,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:53:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:30,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:53:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:30,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:53:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:30,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:53:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:30,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 16:53:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:30,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:53:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:30,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:53:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:31,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:53:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:31,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:53:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:31,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:53:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:31,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:53:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:31,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-11-25 16:53:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:53:31,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:53:31,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765447799] [2022-11-25 16:53:31,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765447799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:53:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144842272] [2022-11-25 16:53:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:53:31,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:53:31,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:53:31,100 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:53:31,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 16:53:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:53:32,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 16:53:32,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:53:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:53:33,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:53:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:53:35,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144842272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:53:35,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:53:35,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 36 [2022-11-25 16:53:35,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933724796] [2022-11-25 16:53:35,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:53:35,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 16:53:35,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:53:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 16:53:35,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 16:53:35,655 INFO L87 Difference]: Start difference. First operand 3965 states and 6073 transitions. Second operand has 36 states, 36 states have (on average 6.222222222222222) internal successors, (224), 33 states have internal predecessors, (224), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-25 16:53:40,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:53:42,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:54:05,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:54:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:12,237 INFO L93 Difference]: Finished difference Result 5026 states and 8105 transitions. [2022-11-25 16:54:12,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 16:54:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.222222222222222) internal successors, (224), 33 states have internal predecessors, (224), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 313 [2022-11-25 16:54:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:12,260 INFO L225 Difference]: With dead ends: 5026 [2022-11-25 16:54:12,260 INFO L226 Difference]: Without dead ends: 5020 [2022-11-25 16:54:12,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 16:54:12,264 INFO L413 NwaCegarLoop]: 1447 mSDtfsCounter, 1472 mSDsluCounter, 9738 mSDsCounter, 0 mSdLazyCounter, 7925 mSolverCounterSat, 591 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 11185 SdHoareTripleChecker+Invalid, 8519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 7925 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:12,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 11185 Invalid, 8519 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [591 Valid, 7925 Invalid, 3 Unknown, 0 Unchecked, 35.6s Time] [2022-11-25 16:54:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2022-11-25 16:54:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 4157. [2022-11-25 16:54:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4157 states, 3330 states have (on average 1.3684684684684685) internal successors, (4557), 3341 states have internal predecessors, (4557), 701 states have call successors, (701), 111 states have call predecessors, (701), 125 states have return successors, (1103), 725 states have call predecessors, (1103), 700 states have call successors, (1103) [2022-11-25 16:54:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 6361 transitions. [2022-11-25 16:54:12,578 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 6361 transitions. Word has length 313 [2022-11-25 16:54:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:12,578 INFO L495 AbstractCegarLoop]: Abstraction has 4157 states and 6361 transitions. [2022-11-25 16:54:12,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.222222222222222) internal successors, (224), 33 states have internal predecessors, (224), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-25 16:54:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 6361 transitions. [2022-11-25 16:54:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-25 16:54:12,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:12,604 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 30, 30, 30, 30, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:54:12,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:12,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 16:54:12,805 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:54:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1334143218, now seen corresponding path program 1 times [2022-11-25 16:54:12,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:12,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591089737] [2022-11-25 16:54:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:12,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:54:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:54:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:54:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:54:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:54:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:54:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 16:54:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:54:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:54:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:54:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:54:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:54:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:54:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-11-25 16:54:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:54:16,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:16,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591089737] [2022-11-25 16:54:16,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591089737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:54:16,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696364406] [2022-11-25 16:54:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:16,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:16,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:16,979 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:16,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 16:54:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:18,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 16:54:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:54:19,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-25 16:54:22,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696364406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:22,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:54:22,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 38 [2022-11-25 16:54:22,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796541983] [2022-11-25 16:54:22,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:22,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 16:54:22,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:22,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 16:54:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 16:54:22,939 INFO L87 Difference]: Start difference. First operand 4157 states and 6361 transitions. Second operand has 38 states, 38 states have (on average 6.131578947368421) internal successors, (233), 35 states have internal predecessors, (233), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-25 16:54:27,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:54:29,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:54:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:49,353 INFO L93 Difference]: Finished difference Result 5050 states and 8127 transitions. [2022-11-25 16:54:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 16:54:49,354 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.131578947368421) internal successors, (233), 35 states have internal predecessors, (233), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 374 [2022-11-25 16:54:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:49,378 INFO L225 Difference]: With dead ends: 5050 [2022-11-25 16:54:49,378 INFO L226 Difference]: Without dead ends: 5044 [2022-11-25 16:54:49,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 742 SyntacticMatches, 30 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 16:54:49,383 INFO L413 NwaCegarLoop]: 1443 mSDtfsCounter, 2506 mSDsluCounter, 7906 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 1398 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2682 SdHoareTripleChecker+Valid, 9349 SdHoareTripleChecker+Invalid, 6875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1398 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:49,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2682 Valid, 9349 Invalid, 6875 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1398 Valid, 5475 Invalid, 2 Unknown, 0 Unchecked, 25.4s Time] [2022-11-25 16:54:49,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2022-11-25 16:54:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 4181. [2022-11-25 16:54:49,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 3350 states have (on average 1.3674626865671642) internal successors, (4581), 3361 states have internal predecessors, (4581), 705 states have call successors, (705), 111 states have call predecessors, (705), 125 states have return successors, (1111), 729 states have call predecessors, (1111), 704 states have call successors, (1111) [2022-11-25 16:54:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 6397 transitions. [2022-11-25 16:54:49,660 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 6397 transitions. Word has length 374 [2022-11-25 16:54:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:49,661 INFO L495 AbstractCegarLoop]: Abstraction has 4181 states and 6397 transitions. [2022-11-25 16:54:49,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.131578947368421) internal successors, (233), 35 states have internal predecessors, (233), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-25 16:54:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 6397 transitions. [2022-11-25 16:54:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-11-25 16:54:49,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:49,711 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:54:49,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-25 16:54:49,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68a9b01f-d1cb-455b-aff9-1029b8e67785/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 16:54:49,926 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:54:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:49,926 INFO L85 PathProgramCache]: Analyzing trace with hash -213614402, now seen corresponding path program 1 times [2022-11-25 16:54:49,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:49,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108112928] [2022-11-25 16:54:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:49,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:50,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 16:54:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:50,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-25 16:54:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:50,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-25 16:54:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:54:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 16:54:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 16:54:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 16:54:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:54:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 16:54:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 16:54:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 16:54:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 16:54:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:51,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:54:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-11-25 16:54:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4043 trivial. 0 not checked. [2022-11-25 16:54:52,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:52,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108112928] [2022-11-25 16:54:52,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108112928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:54:52,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:54:52,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 16:54:52,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619439762] [2022-11-25 16:54:52,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:54:52,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:54:52,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:54:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:54:52,007 INFO L87 Difference]: Start difference. First operand 4181 states and 6397 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 10 states have internal predecessors, (101), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 16:54:55,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 16:55:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:23,820 INFO L93 Difference]: Finished difference Result 5540 states and 8870 transitions. [2022-11-25 16:55:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:55:23,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 10 states have internal predecessors, (101), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 383 [2022-11-25 16:55:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:23,823 INFO L225 Difference]: With dead ends: 5540 [2022-11-25 16:55:23,823 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 16:55:23,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-11-25 16:55:23,850 INFO L413 NwaCegarLoop]: 1214 mSDtfsCounter, 6045 mSDsluCounter, 4314 mSDsCounter, 0 mSdLazyCounter, 7035 mSolverCounterSat, 2880 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6140 SdHoareTripleChecker+Valid, 5528 SdHoareTripleChecker+Invalid, 9916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2880 IncrementalHoareTripleChecker+Valid, 7035 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:23,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6140 Valid, 5528 Invalid, 9916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2880 Valid, 7035 Invalid, 1 Unknown, 0 Unchecked, 29.9s Time] [2022-11-25 16:55:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 16:55:23,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 16:55:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 16:55:23,854 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 383 [2022-11-25 16:55:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:23,854 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 16:55:23,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 10 states have internal predecessors, (101), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 16:55:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 16:55:23,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 16:55:23,858 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 16:55:23,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-25 16:55:23,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-25 16:55:29,774 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-25 16:55:35,106 WARN L233 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)