./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8 --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 ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 --- 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-e04fb08 [2022-11-16 12:07:32,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:07:32,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:07:32,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:07:32,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:07:32,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:07:32,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:07:32,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:07:32,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:07:32,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:07:32,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:07:32,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:07:32,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:07:32,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:07:32,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:07:32,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:07:32,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:07:32,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:07:32,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:07:32,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:07:32,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:07:32,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:07:32,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:07:32,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:07:32,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:07:32,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:07:32,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:07:32,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:07:32,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:07:32,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:07:32,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:07:32,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:07:32,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:07:32,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:07:32,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:07:32,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:07:32,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:07:32,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:07:32,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:07:32,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:07:32,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:07:32,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 12:07:32,191 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:07:32,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:07:32,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:07:32,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:07:32,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:07:32,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:07:32,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:07:32,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:07:32,198 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:07:32,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:07:32,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:07:32,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:07:32,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:07:32,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:07:32,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:07:32,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:07:32,202 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:07:32,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:07:32,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:07:32,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:07:32,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:07:32,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:07:32,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:07:32,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:07:32,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:07:32,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:07:32,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:07:32,204 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:07:32,216 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:07:32,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:07:32,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 [2022-11-16 12:07:32,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:07:32,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:07:32,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:07:32,507 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:07:32,508 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:07:32,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2022-11-16 12:07:32,581 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/data/1de940950/b251d5f95aaa46f1b939bd95c6d6ec0d/FLAG66daa1354 [2022-11-16 12:07:33,449 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:07:33,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2022-11-16 12:07:33,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/data/1de940950/b251d5f95aaa46f1b939bd95c6d6ec0d/FLAG66daa1354 [2022-11-16 12:07:33,879 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/data/1de940950/b251d5f95aaa46f1b939bd95c6d6ec0d [2022-11-16 12:07:33,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:07:33,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:07:33,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:07:33,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:07:33,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:07:33,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:07:33" (1/1) ... [2022-11-16 12:07:33,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1821ec28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:33, skipping insertion in model container [2022-11-16 12:07:33,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:07:33" (1/1) ... [2022-11-16 12:07:33,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:07:34,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:07:34,444 WARN L229 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_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2022-11-16 12:07:34,453 WARN L229 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_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2022-11-16 12:07:35,901 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:35,902 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:35,903 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:35,905 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:35,907 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:35,932 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:35,933 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:35,937 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:35,938 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:36,839 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 12:07:36,843 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 12:07:36,847 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 12:07:36,850 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 12:07:36,857 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 12:07:36,860 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 12:07:36,863 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 12:07:36,868 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 12:07:36,871 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 12:07:36,876 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 12:07:37,255 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 12:07:37,415 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:37,416 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:37,970 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:37,972 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,007 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,011 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,027 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,030 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,054 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,056 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,057 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,057 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,058 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,059 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,060 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:07:38,168 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:07:38,183 WARN L229 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_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2022-11-16 12:07:38,183 WARN L229 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_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2022-11-16 12:07:38,217 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,218 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,218 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,219 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,219 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,225 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,226 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,227 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,227 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,258 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 12:07:38,259 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 12:07:38,260 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 12:07:38,261 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 12:07:38,262 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 12:07:38,262 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 12:07:38,263 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 12:07:38,263 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 12:07:38,264 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 12:07:38,264 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 12:07:38,287 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 12:07:38,392 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,395 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,526 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,527 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,536 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,537 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,561 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,562 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,583 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,584 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,584 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,585 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,585 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,586 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,586 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 12:07:38,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:07:39,111 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:07:39,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39 WrapperNode [2022-11-16 12:07:39,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:07:39,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:07:39,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:07:39,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:07:39,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,436 INFO L138 Inliner]: procedures = 776, calls = 3576, calls flagged for inlining = 77, calls inlined = 6, statements flattened = 787 [2022-11-16 12:07:39,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:07:39,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:07:39,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:07:39,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:07:39,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,571 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:07:39,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:07:39,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:07:39,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:07:39,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (1/1) ... [2022-11-16 12:07:39,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:07:39,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:39,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:07:39,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:07:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-16 12:07:39,714 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-16 12:07:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:07:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:07:39,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:07:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:07:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:07:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:07:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:07:39,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:07:39,718 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-16 12:07:39,718 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-16 12:07:39,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:07:39,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:07:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure hashlittle2 [2022-11-16 12:07:39,720 INFO L138 BoogieDeclarations]: Found implementation of procedure hashlittle2 [2022-11-16 12:07:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:07:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-16 12:07:39,721 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-16 12:07:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:07:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 12:07:39,722 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 12:07:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 12:07:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:07:40,211 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:07:40,214 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:07:43,241 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2022-11-16 12:07:43,251 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:07:43,262 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:07:43,262 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 12:07:43,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:07:43 BoogieIcfgContainer [2022-11-16 12:07:43,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:07:43,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:07:43,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:07:43,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:07:43,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:07:33" (1/3) ... [2022-11-16 12:07:43,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e88bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:07:43, skipping insertion in model container [2022-11-16 12:07:43,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:39" (2/3) ... [2022-11-16 12:07:43,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e88bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:07:43, skipping insertion in model container [2022-11-16 12:07:43,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:07:43" (3/3) ... [2022-11-16 12:07:43,279 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_byte_cursor_ptr_harness.i [2022-11-16 12:07:43,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:07:43,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:07:43,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:07:43,414 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;@24deaa00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:07:43,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:07:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 12:07:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:07:43,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:43,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 12:07:43,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1196197405, now seen corresponding path program 1 times [2022-11-16 12:07:43,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:43,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322736079] [2022-11-16 12:07:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:43,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:07:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:07:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:07:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:07:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:07:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:07:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-16 12:07:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:07:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:07:44,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:44,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322736079] [2022-11-16 12:07:44,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322736079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:44,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:44,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:07:44,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571595422] [2022-11-16 12:07:44,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:44,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:07:44,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:07:44,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:07:44,749 INFO L87 Difference]: Start difference. First operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:07:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:45,329 INFO L93 Difference]: Finished difference Result 263 states and 398 transitions. [2022-11-16 12:07:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:07:45,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-16 12:07:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:45,359 INFO L225 Difference]: With dead ends: 263 [2022-11-16 12:07:45,360 INFO L226 Difference]: Without dead ends: 128 [2022-11-16 12:07:45,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:07:45,377 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 28 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:45,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 243 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:07:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-16 12:07:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-16 12:07:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 109 states have internal predecessors, (161), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:07:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2022-11-16 12:07:45,449 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 62 [2022-11-16 12:07:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:45,450 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2022-11-16 12:07:45,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:07:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2022-11-16 12:07:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:07:45,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:45,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-16 12:07:45,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:07:45,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:45,458 INFO L85 PathProgramCache]: Analyzing trace with hash -902599839, now seen corresponding path program 1 times [2022-11-16 12:07:45,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:45,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801443487] [2022-11-16 12:07:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:45,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:07:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:07:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:07:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-16 12:07:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:07:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:07:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-16 12:07:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:07:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 12:07:46,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:46,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801443487] [2022-11-16 12:07:46,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801443487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:46,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301328268] [2022-11-16 12:07:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:46,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:46,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:46,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:46,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:07:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:47,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:07:47,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:07:47,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:47,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301328268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:47,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:07:47,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-16 12:07:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160944265] [2022-11-16 12:07:47,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:47,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:07:47,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:07:47,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:47,750 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:07:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:47,954 INFO L93 Difference]: Finished difference Result 239 states and 354 transitions. [2022-11-16 12:07:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:07:47,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-16 12:07:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:47,968 INFO L225 Difference]: With dead ends: 239 [2022-11-16 12:07:47,968 INFO L226 Difference]: Without dead ends: 131 [2022-11-16 12:07:47,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:07:47,975 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 197 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:47,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 634 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:07:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-16 12:07:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-16 12:07:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-16 12:07:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-11-16 12:07:48,022 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 62 [2022-11-16 12:07:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:48,023 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-11-16 12:07:48,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:07:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-11-16 12:07:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 12:07:48,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:48,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:07:48,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:48,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:48,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash 90546502, now seen corresponding path program 1 times [2022-11-16 12:07:48,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:48,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970323020] [2022-11-16 12:07:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:48,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:49,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:07:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:49,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:07:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:49,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:07:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:49,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:07:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:49,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:07:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:50,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:07:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:50,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:07:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:50,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:07:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:07:50,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:50,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970323020] [2022-11-16 12:07:50,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970323020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:50,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112269811] [2022-11-16 12:07:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:50,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:50,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:50,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:50,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:07:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:50,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 2567 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:07:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:07:51,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:51,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112269811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:51,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:07:51,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-16 12:07:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152766670] [2022-11-16 12:07:51,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:51,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:51,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:51,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:07:51,034 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:07:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:51,265 INFO L93 Difference]: Finished difference Result 239 states and 350 transitions. [2022-11-16 12:07:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:07:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2022-11-16 12:07:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:51,268 INFO L225 Difference]: With dead ends: 239 [2022-11-16 12:07:51,268 INFO L226 Difference]: Without dead ends: 131 [2022-11-16 12:07:51,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:07:51,270 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 201 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:51,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 794 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:07:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-16 12:07:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-16 12:07:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-16 12:07:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2022-11-16 12:07:51,284 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 64 [2022-11-16 12:07:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:51,284 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2022-11-16 12:07:51,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:07:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2022-11-16 12:07:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 12:07:51,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:51,288 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 12:07:51,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:51,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:51,500 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash -249804501, now seen corresponding path program 2 times [2022-11-16 12:07:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:51,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392910635] [2022-11-16 12:07:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:07:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:07:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:07:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:07:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:07:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:07:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:07:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 12:07:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:07:53,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:53,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392910635] [2022-11-16 12:07:53,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392910635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:53,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292817944] [2022-11-16 12:07:53,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:53,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:53,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:53,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:07:54,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:07:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:54,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:07:54,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:07:54,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:54,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292817944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:54,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:07:54,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 11 [2022-11-16 12:07:54,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636354657] [2022-11-16 12:07:54,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:54,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:54,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:07:54,871 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:07:54,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:54,960 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2022-11-16 12:07:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:07:54,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 66 [2022-11-16 12:07:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:54,964 INFO L225 Difference]: With dead ends: 158 [2022-11-16 12:07:54,964 INFO L226 Difference]: Without dead ends: 128 [2022-11-16 12:07:54,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:07:54,967 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 28 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:54,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1014 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:07:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-16 12:07:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-16 12:07:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 109 states have internal predecessors, (160), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:07:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2022-11-16 12:07:54,986 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 66 [2022-11-16 12:07:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:54,987 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2022-11-16 12:07:54,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:07:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2022-11-16 12:07:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:07:54,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:54,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:07:55,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:55,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:55,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:55,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1967970000, now seen corresponding path program 1 times [2022-11-16 12:07:55,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:55,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623496459] [2022-11-16 12:07:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:55,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:09:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:09:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:09:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:09:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:09:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:09:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:09:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 12:09:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:09:03,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:03,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623496459] [2022-11-16 12:09:03,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623496459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025705984] [2022-11-16 12:09:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:03,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:03,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:09:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:04,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:09:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 12:09:04,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:09:04,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025705984] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:04,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:04,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 25 [2022-11-16 12:09:04,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100096895] [2022-11-16 12:09:04,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:04,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:09:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:09:04,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:09:04,618 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-16 12:09:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:04,754 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-11-16 12:09:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:09:04,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2022-11-16 12:09:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:04,760 INFO L225 Difference]: With dead ends: 140 [2022-11-16 12:09:04,760 INFO L226 Difference]: Without dead ends: 138 [2022-11-16 12:09:04,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:09:04,761 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 18 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:04,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1236 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:09:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-16 12:09:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-11-16 12:09:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 114 states have (on average 1.456140350877193) internal successors, (166), 116 states have internal predecessors, (166), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-16 12:09:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 197 transitions. [2022-11-16 12:09:04,784 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 197 transitions. Word has length 68 [2022-11-16 12:09:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:04,785 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 197 transitions. [2022-11-16 12:09:04,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-16 12:09:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 197 transitions. [2022-11-16 12:09:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 12:09:04,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:04,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:09:04,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:05,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:05,005 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash -278658024, now seen corresponding path program 1 times [2022-11-16 12:09:05,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:05,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802921603] [2022-11-16 12:09:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:05,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:22,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:09:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:09:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:22,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:09:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:22,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:09:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:22,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:09:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:23,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:09:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:23,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:09:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:23,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-16 12:09:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:09:23,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802921603] [2022-11-16 12:09:23,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802921603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927672553] [2022-11-16 12:09:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:23,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:23,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:23,258 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:23,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:09:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:23,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 12:09:23,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:23,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:09:25,628 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:09:25,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:09:26,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:26,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:26,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:26,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 28 [2022-11-16 12:09:26,329 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-16 12:09:26,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-16 12:09:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:09:26,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:27,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927672553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:27,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:27,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-11-16 12:09:27,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161351139] [2022-11-16 12:09:27,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:27,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:09:27,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:27,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:09:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1000, Unknown=8, NotChecked=0, Total=1122 [2022-11-16 12:09:27,573 INFO L87 Difference]: Start difference. First operand 137 states and 197 transitions. Second operand has 29 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 24 states have internal predecessors, (92), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:09:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:30,850 INFO L93 Difference]: Finished difference Result 296 states and 424 transitions. [2022-11-16 12:09:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:09:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 24 states have internal predecessors, (92), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 72 [2022-11-16 12:09:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:30,855 INFO L225 Difference]: With dead ends: 296 [2022-11-16 12:09:30,855 INFO L226 Difference]: Without dead ends: 261 [2022-11-16 12:09:30,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=278, Invalid=2674, Unknown=18, NotChecked=0, Total=2970 [2022-11-16 12:09:30,858 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 155 mSDsluCounter, 2649 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 2852 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1588 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:30,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 2852 Invalid, 2892 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [78 Valid, 1226 Invalid, 0 Unknown, 1588 Unchecked, 1.8s Time] [2022-11-16 12:09:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-16 12:09:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 189. [2022-11-16 12:09:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 152 states have (on average 1.388157894736842) internal successors, (211), 157 states have internal predecessors, (211), 22 states have call successors, (22), 11 states have call predecessors, (22), 14 states have return successors, (29), 20 states have call predecessors, (29), 21 states have call successors, (29) [2022-11-16 12:09:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 262 transitions. [2022-11-16 12:09:30,893 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 262 transitions. Word has length 72 [2022-11-16 12:09:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:30,894 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 262 transitions. [2022-11-16 12:09:30,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 24 states have internal predecessors, (92), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:09:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 262 transitions. [2022-11-16 12:09:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 12:09:30,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:30,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:09:30,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:31,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:31,108 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1208498679, now seen corresponding path program 1 times [2022-11-16 12:09:31,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:31,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238860691] [2022-11-16 12:09:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:09:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:09:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:09:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:09:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:09:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:09:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:09:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:09:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:09:33,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:33,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238860691] [2022-11-16 12:09:33,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238860691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:33,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738126205] [2022-11-16 12:09:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:33,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:33,490 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:33,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:09:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:34,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 12:09:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:34,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:09:35,384 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:09:35,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:09:35,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:35,831 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:09:35,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2022-11-16 12:09:35,864 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:09:35,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:09:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:09:36,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:37,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738126205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:37,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:37,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-11-16 12:09:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182169280] [2022-11-16 12:09:37,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:09:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:09:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1000, Unknown=8, NotChecked=0, Total=1122 [2022-11-16 12:09:37,026 INFO L87 Difference]: Start difference. First operand 189 states and 262 transitions. Second operand has 29 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 24 states have internal predecessors, (94), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:09:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:38,914 INFO L93 Difference]: Finished difference Result 257 states and 359 transitions. [2022-11-16 12:09:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:09:38,919 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 24 states have internal predecessors, (94), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 73 [2022-11-16 12:09:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:38,922 INFO L225 Difference]: With dead ends: 257 [2022-11-16 12:09:38,922 INFO L226 Difference]: Without dead ends: 222 [2022-11-16 12:09:38,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=245, Invalid=2289, Unknown=16, NotChecked=0, Total=2550 [2022-11-16 12:09:38,925 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 71 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 811 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:38,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2089 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 529 Invalid, 0 Unknown, 811 Unchecked, 0.8s Time] [2022-11-16 12:09:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-16 12:09:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 197. [2022-11-16 12:09:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 157 states have (on average 1.3821656050955413) internal successors, (217), 163 states have internal predecessors, (217), 24 states have call successors, (24), 11 states have call predecessors, (24), 15 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2022-11-16 12:09:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 274 transitions. [2022-11-16 12:09:38,951 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 274 transitions. Word has length 73 [2022-11-16 12:09:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:38,952 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 274 transitions. [2022-11-16 12:09:38,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 24 states have internal predecessors, (94), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:09:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 274 transitions. [2022-11-16 12:09:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 12:09:38,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:38,955 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:09:38,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 12:09:39,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:09:39,165 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:09:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash -994417807, now seen corresponding path program 1 times [2022-11-16 12:09:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:39,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998145185] [2022-11-16 12:09:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:39,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:02,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:15:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:02,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:02,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:15:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:02,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:15:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:02,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:15:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:02,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:15:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:03,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:15:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:03,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-16 12:15:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:15:03,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:03,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998145185] [2022-11-16 12:15:03,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998145185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:03,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077159730] [2022-11-16 12:15:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:03,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:03,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:03,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:03,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:15:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:03,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:15:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:04,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:04,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 12 [2022-11-16 12:15:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:15:04,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:04,981 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-16 12:15:04,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 12:15:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:15:04,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077159730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:04,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:04,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 27 [2022-11-16 12:15:04,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609930049] [2022-11-16 12:15:04,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:04,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:15:04,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:15:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:15:04,997 INFO L87 Difference]: Start difference. First operand 197 states and 274 transitions. Second operand has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-16 12:15:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:10,181 INFO L93 Difference]: Finished difference Result 395 states and 575 transitions. [2022-11-16 12:15:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:15:10,182 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) Word has length 73 [2022-11-16 12:15:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:10,186 INFO L225 Difference]: With dead ends: 395 [2022-11-16 12:15:10,186 INFO L226 Difference]: Without dead ends: 360 [2022-11-16 12:15:10,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=272, Invalid=2178, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 12:15:10,190 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 839 mSDsluCounter, 2147 mSDsCounter, 0 mSdLazyCounter, 3688 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 4168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 3688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:10,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 2321 Invalid, 4168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 3688 Invalid, 0 Unknown, 431 Unchecked, 4.1s Time] [2022-11-16 12:15:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-16 12:15:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 268. [2022-11-16 12:15:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 225 states have (on average 1.4444444444444444) internal successors, (325), 231 states have internal predecessors, (325), 25 states have call successors, (25), 13 states have call predecessors, (25), 17 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-11-16 12:15:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 384 transitions. [2022-11-16 12:15:10,227 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 384 transitions. Word has length 73 [2022-11-16 12:15:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:10,227 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 384 transitions. [2022-11-16 12:15:10,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-16 12:15:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 384 transitions. [2022-11-16 12:15:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 12:15:10,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:10,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:15:10,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 12:15:10,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:15:10,443 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:10,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1569134765, now seen corresponding path program 1 times [2022-11-16 12:15:10,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:10,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157177739] [2022-11-16 12:15:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:10,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:15:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:15:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:15:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:15:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:15:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:15:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:15:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:15:12,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:12,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157177739] [2022-11-16 12:15:12,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157177739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:12,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489261955] [2022-11-16 12:15:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:12,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:12,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:12,601 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:12,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:15:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:13,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:15:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:13,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:15:14,351 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:15:14,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:15:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:14,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:14,796 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:15:14,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 111 [2022-11-16 12:15:14,837 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:15:14,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:15:14,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:15:14,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 12:15:15,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 35 [2022-11-16 12:15:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:15:15,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:16,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489261955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:16,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:15:16,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-11-16 12:15:16,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337704383] [2022-11-16 12:15:16,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:16,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:15:16,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:15:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1001, Unknown=7, NotChecked=0, Total=1122 [2022-11-16 12:15:16,024 INFO L87 Difference]: Start difference. First operand 268 states and 384 transitions. Second operand has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 24 states have internal predecessors, (96), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:15:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:17,986 INFO L93 Difference]: Finished difference Result 390 states and 563 transitions. [2022-11-16 12:15:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:15:17,990 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 24 states have internal predecessors, (96), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 74 [2022-11-16 12:15:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:17,993 INFO L225 Difference]: With dead ends: 390 [2022-11-16 12:15:17,993 INFO L226 Difference]: Without dead ends: 350 [2022-11-16 12:15:17,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=2582, Unknown=19, NotChecked=0, Total=2862 [2022-11-16 12:15:17,996 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 229 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1182 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:17,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1855 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 724 Invalid, 0 Unknown, 1182 Unchecked, 0.9s Time] [2022-11-16 12:15:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-16 12:15:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 330. [2022-11-16 12:15:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 284 states have (on average 1.4612676056338028) internal successors, (415), 290 states have internal predecessors, (415), 27 states have call successors, (27), 14 states have call predecessors, (27), 18 states have return successors, (41), 25 states have call predecessors, (41), 26 states have call successors, (41) [2022-11-16 12:15:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 483 transitions. [2022-11-16 12:15:18,039 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 483 transitions. Word has length 74 [2022-11-16 12:15:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:18,039 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 483 transitions. [2022-11-16 12:15:18,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 24 states have internal predecessors, (96), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:15:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 483 transitions. [2022-11-16 12:15:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 12:15:18,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:18,043 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:15:18,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:18,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:18,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:18,255 INFO L85 PathProgramCache]: Analyzing trace with hash -7761607, now seen corresponding path program 1 times [2022-11-16 12:15:18,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:18,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560276182] [2022-11-16 12:15:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:18,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:15:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:19,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:19,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:15:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:19,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:15:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:19,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:15:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:19,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:15:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:15:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:20,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:15:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:15:20,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560276182] [2022-11-16 12:15:20,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560276182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666868878] [2022-11-16 12:15:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:20,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:20,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:20,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:15:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:20,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 12:15:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:20,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:15:21,680 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:15:21,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:15:22,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:22,207 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-16 12:15:22,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-16 12:15:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:15:22,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:22,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666868878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:22,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:15:22,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-16 12:15:22,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254647001] [2022-11-16 12:15:22,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:22,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:15:22,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:15:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-16 12:15:22,633 INFO L87 Difference]: Start difference. First operand 330 states and 483 transitions. Second operand has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:15:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:24,041 INFO L93 Difference]: Finished difference Result 413 states and 603 transitions. [2022-11-16 12:15:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:15:24,042 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 74 [2022-11-16 12:15:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:24,045 INFO L225 Difference]: With dead ends: 413 [2022-11-16 12:15:24,046 INFO L226 Difference]: Without dead ends: 370 [2022-11-16 12:15:24,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=211, Invalid=1858, Unknown=1, NotChecked=0, Total=2070 [2022-11-16 12:15:24,048 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 60 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:24,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1397 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 725 Invalid, 0 Unknown, 335 Unchecked, 0.8s Time] [2022-11-16 12:15:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-16 12:15:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 330. [2022-11-16 12:15:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 284 states have (on average 1.4612676056338028) internal successors, (415), 290 states have internal predecessors, (415), 27 states have call successors, (27), 14 states have call predecessors, (27), 18 states have return successors, (41), 25 states have call predecessors, (41), 26 states have call successors, (41) [2022-11-16 12:15:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 483 transitions. [2022-11-16 12:15:24,080 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 483 transitions. Word has length 74 [2022-11-16 12:15:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:24,080 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 483 transitions. [2022-11-16 12:15:24,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:15:24,081 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 483 transitions. [2022-11-16 12:15:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 12:15:24,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:24,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:15:24,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:24,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:15:24,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:24,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1464298396, now seen corresponding path program 1 times [2022-11-16 12:15:24,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:24,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124318658] [2022-11-16 12:15:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:24,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:21,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:16:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:21,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:16:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:21,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:16:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:21,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:16:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:21,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:16:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:21,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:16:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:21,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:16:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:21,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-16 12:16:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:16:21,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:21,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124318658] [2022-11-16 12:16:21,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124318658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:21,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654625260] [2022-11-16 12:16:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:21,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:21,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:21,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:21,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:16:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:22,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:16:22,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:22,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:16:23,002 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:16:23,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:16:23,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:23,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:23,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:23,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-16 12:16:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:16:23,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:24,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654625260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:24,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:16:24,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-16 12:16:24,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550842506] [2022-11-16 12:16:24,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:24,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:16:24,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:16:24,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-16 12:16:24,038 INFO L87 Difference]: Start difference. First operand 330 states and 483 transitions. Second operand has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:16:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:25,434 INFO L93 Difference]: Finished difference Result 380 states and 545 transitions. [2022-11-16 12:16:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:16:25,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 75 [2022-11-16 12:16:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:25,438 INFO L225 Difference]: With dead ends: 380 [2022-11-16 12:16:25,438 INFO L226 Difference]: Without dead ends: 345 [2022-11-16 12:16:25,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=183, Invalid=1622, Unknown=1, NotChecked=0, Total=1806 [2022-11-16 12:16:25,440 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 62 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:25,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1629 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 749 Invalid, 0 Unknown, 659 Unchecked, 0.8s Time] [2022-11-16 12:16:25,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-16 12:16:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 335. [2022-11-16 12:16:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 287 states have (on average 1.456445993031359) internal successors, (418), 293 states have internal predecessors, (418), 28 states have call successors, (28), 15 states have call predecessors, (28), 19 states have return successors, (42), 26 states have call predecessors, (42), 27 states have call successors, (42) [2022-11-16 12:16:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 488 transitions. [2022-11-16 12:16:25,485 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 488 transitions. Word has length 75 [2022-11-16 12:16:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:25,489 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 488 transitions. [2022-11-16 12:16:25,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:16:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 488 transitions. [2022-11-16 12:16:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 12:16:25,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:25,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:16:25,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:25,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:25,702 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:25,703 INFO L85 PathProgramCache]: Analyzing trace with hash 185282190, now seen corresponding path program 1 times [2022-11-16 12:16:25,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:25,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132436840] [2022-11-16 12:16:25,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:25,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:16:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:26,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:16:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:26,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:16:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:16:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:26,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:16:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:26,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:16:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:26,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:16:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:27,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-16 12:16:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:16:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132436840] [2022-11-16 12:16:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132436840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792967569] [2022-11-16 12:16:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:27,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:27,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:27,164 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:27,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:16:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:27,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:16:27,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:27,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:16:28,804 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:16:28,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:16:29,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:29,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:29,207 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 12:16:29,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 111 [2022-11-16 12:16:29,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:16:29,254 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:16:29,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:16:29,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 12:16:29,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 45 [2022-11-16 12:16:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:16:29,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:30,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792967569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:30,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:16:30,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-11-16 12:16:30,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475570028] [2022-11-16 12:16:30,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:30,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:16:30,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:30,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:16:30,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=999, Unknown=9, NotChecked=0, Total=1122 [2022-11-16 12:16:30,235 INFO L87 Difference]: Start difference. First operand 335 states and 488 transitions. Second operand has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:16:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:31,744 INFO L93 Difference]: Finished difference Result 385 states and 550 transitions. [2022-11-16 12:16:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:16:31,745 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 76 [2022-11-16 12:16:31,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:31,747 INFO L225 Difference]: With dead ends: 385 [2022-11-16 12:16:31,748 INFO L226 Difference]: Without dead ends: 350 [2022-11-16 12:16:31,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=243, Invalid=2291, Unknown=16, NotChecked=0, Total=2550 [2022-11-16 12:16:31,750 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 51 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:31,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1806 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 753 Invalid, 0 Unknown, 530 Unchecked, 0.7s Time] [2022-11-16 12:16:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-16 12:16:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 335. [2022-11-16 12:16:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 287 states have (on average 1.456445993031359) internal successors, (418), 293 states have internal predecessors, (418), 28 states have call successors, (28), 15 states have call predecessors, (28), 19 states have return successors, (42), 26 states have call predecessors, (42), 27 states have call successors, (42) [2022-11-16 12:16:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 488 transitions. [2022-11-16 12:16:31,779 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 488 transitions. Word has length 76 [2022-11-16 12:16:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:31,779 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 488 transitions. [2022-11-16 12:16:31,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:16:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 488 transitions. [2022-11-16 12:16:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 12:16:31,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:31,782 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:16:31,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:31,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:31,993 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1817674049, now seen corresponding path program 1 times [2022-11-16 12:16:31,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:31,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150498726] [2022-11-16 12:16:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:33,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:16:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:33,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:16:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:33,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:16:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:33,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:16:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:33,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:16:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:33,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:16:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:33,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:16:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:33,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:16:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:16:33,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:33,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150498726] [2022-11-16 12:16:33,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150498726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:33,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476214387] [2022-11-16 12:16:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:33,374 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:33,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:16:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 12:16:34,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:34,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:16:34,913 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 12:16:34,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-16 12:16:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:35,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:35,448 INFO L321 Elim1Store]: treesize reduction 122, result has 0.8 percent of original size [2022-11-16 12:16:35,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 28 [2022-11-16 12:16:35,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:16:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:16:35,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:35,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476214387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:35,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:16:35,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-16 12:16:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889571845] [2022-11-16 12:16:35,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:35,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:16:35,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:16:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=835, Unknown=1, NotChecked=0, Total=930 [2022-11-16 12:16:35,951 INFO L87 Difference]: Start difference. First operand 335 states and 488 transitions. Second operand has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:16:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:37,508 INFO L93 Difference]: Finished difference Result 395 states and 581 transitions. [2022-11-16 12:16:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:16:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2022-11-16 12:16:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:37,512 INFO L225 Difference]: With dead ends: 395 [2022-11-16 12:16:37,512 INFO L226 Difference]: Without dead ends: 360 [2022-11-16 12:16:37,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=195, Invalid=1784, Unknown=1, NotChecked=0, Total=1980 [2022-11-16 12:16:37,514 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 220 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 2128 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1344 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:37,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 2128 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 968 Invalid, 0 Unknown, 1344 Unchecked, 1.0s Time] [2022-11-16 12:16:37,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-16 12:16:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 335. [2022-11-16 12:16:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 287 states have (on average 1.456445993031359) internal successors, (418), 293 states have internal predecessors, (418), 28 states have call successors, (28), 15 states have call predecessors, (28), 19 states have return successors, (42), 26 states have call predecessors, (42), 27 states have call successors, (42) [2022-11-16 12:16:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 488 transitions. [2022-11-16 12:16:37,546 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 488 transitions. Word has length 77 [2022-11-16 12:16:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:37,546 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 488 transitions. [2022-11-16 12:16:37,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:16:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 488 transitions. [2022-11-16 12:16:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 12:16:37,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:37,549 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:16:37,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 12:16:37,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:16:37,759 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1265263437, now seen corresponding path program 1 times [2022-11-16 12:16:37,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:37,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205213869] [2022-11-16 12:16:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:37,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:38,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:16:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:38,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:16:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:38,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:16:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:38,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:16:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:38,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:16:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:38,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:16:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:38,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:16:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:16:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:16:39,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:39,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205213869] [2022-11-16 12:16:39,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205213869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:39,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575253795] [2022-11-16 12:16:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:39,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:39,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:39,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:16:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:16:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:39,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:16:40,687 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:16:40,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:16:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:41,296 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-16 12:16:41,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-16 12:16:41,311 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:16:41,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:16:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:16:41,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:41,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575253795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:41,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:16:41,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2022-11-16 12:16:41,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612775280] [2022-11-16 12:16:41,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:41,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:16:41,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:16:41,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=894, Unknown=1, NotChecked=0, Total=992 [2022-11-16 12:16:41,721 INFO L87 Difference]: Start difference. First operand 335 states and 488 transitions. Second operand has 27 states, 25 states have (on average 4.04) internal successors, (101), 23 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:16:43,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:43,540 INFO L93 Difference]: Finished difference Result 433 states and 650 transitions. [2022-11-16 12:16:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:16:43,541 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.04) internal successors, (101), 23 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2022-11-16 12:16:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:43,544 INFO L225 Difference]: With dead ends: 433 [2022-11-16 12:16:43,544 INFO L226 Difference]: Without dead ends: 390 [2022-11-16 12:16:43,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=236, Invalid=2212, Unknown=2, NotChecked=0, Total=2450 [2022-11-16 12:16:43,547 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 89 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 962 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:43,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 2016 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 937 Invalid, 0 Unknown, 962 Unchecked, 1.0s Time] [2022-11-16 12:16:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-16 12:16:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 341. [2022-11-16 12:16:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 293 states have (on average 1.4607508532423208) internal successors, (428), 299 states have internal predecessors, (428), 28 states have call successors, (28), 15 states have call predecessors, (28), 19 states have return successors, (42), 26 states have call predecessors, (42), 27 states have call successors, (42) [2022-11-16 12:16:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 498 transitions. [2022-11-16 12:16:43,578 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 498 transitions. Word has length 77 [2022-11-16 12:16:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:43,578 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 498 transitions. [2022-11-16 12:16:43,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.04) internal successors, (101), 23 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:16:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 498 transitions. [2022-11-16 12:16:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 12:16:43,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:43,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:16:43,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:43,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:16:43,797 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:43,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1399276943, now seen corresponding path program 1 times [2022-11-16 12:16:43,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:43,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016687555] [2022-11-16 12:16:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:43,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:47,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:16:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:47,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:16:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:47,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:16:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:47,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:16:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:47,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:16:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:47,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:16:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:47,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:16:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:47,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:16:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:16:47,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:47,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016687555] [2022-11-16 12:16:47,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016687555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:47,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630204443] [2022-11-16 12:16:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:47,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:47,836 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:47,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:16:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 12:16:48,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:48,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:16:49,434 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-16 12:16:49,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 30 [2022-11-16 12:16:50,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:50,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:50,124 INFO L321 Elim1Store]: treesize reduction 65, result has 1.5 percent of original size [2022-11-16 12:16:50,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 23 [2022-11-16 12:16:50,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:16:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:16:50,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:50,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630204443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:50,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:16:50,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2022-11-16 12:16:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333341088] [2022-11-16 12:16:50,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:50,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:16:50,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:50,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:16:50,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=950, Unknown=1, NotChecked=0, Total=1056 [2022-11-16 12:16:50,533 INFO L87 Difference]: Start difference. First operand 341 states and 498 transitions. Second operand has 28 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 24 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:16:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:51,916 INFO L93 Difference]: Finished difference Result 421 states and 614 transitions. [2022-11-16 12:16:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 12:16:51,917 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 24 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2022-11-16 12:16:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:51,919 INFO L225 Difference]: With dead ends: 421 [2022-11-16 12:16:51,919 INFO L226 Difference]: Without dead ends: 378 [2022-11-16 12:16:51,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=228, Invalid=2123, Unknown=1, NotChecked=0, Total=2352 [2022-11-16 12:16:51,922 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 46 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 868 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:51,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1929 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 791 Invalid, 0 Unknown, 868 Unchecked, 0.7s Time] [2022-11-16 12:16:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-16 12:16:51,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 341. [2022-11-16 12:16:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 293 states have (on average 1.4607508532423208) internal successors, (428), 299 states have internal predecessors, (428), 28 states have call successors, (28), 15 states have call predecessors, (28), 19 states have return successors, (42), 26 states have call predecessors, (42), 27 states have call successors, (42) [2022-11-16 12:16:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 498 transitions. [2022-11-16 12:16:51,954 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 498 transitions. Word has length 77 [2022-11-16 12:16:51,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:51,955 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 498 transitions. [2022-11-16 12:16:51,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 24 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:16:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 498 transitions. [2022-11-16 12:16:51,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 12:16:51,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:51,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:16:51,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:52,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:16:52,168 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:52,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1234100159, now seen corresponding path program 2 times [2022-11-16 12:16:52,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:52,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235040763] [2022-11-16 12:16:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:52,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:16:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:16:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:16:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:16:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:16:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:16:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:16:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:16:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:16:53,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:53,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235040763] [2022-11-16 12:16:53,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235040763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:53,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662991692] [2022-11-16 12:16:53,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:16:53,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:53,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:53,337 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:53,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:16:55,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:16:55,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:16:55,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 12:16:55,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:55,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:56,116 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-16 12:16:56,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-11-16 12:16:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:16:56,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662991692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:16:56,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:16:56,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 26 [2022-11-16 12:16:56,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306747778] [2022-11-16 12:16:56,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:56,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:16:56,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:16:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:16:56,132 INFO L87 Difference]: Start difference. First operand 341 states and 498 transitions. Second operand has 26 states, 23 states have (on average 4.869565217391305) internal successors, (112), 22 states have internal predecessors, (112), 9 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 6 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-16 12:16:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:58,546 INFO L93 Difference]: Finished difference Result 616 states and 905 transitions. [2022-11-16 12:16:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:16:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 4.869565217391305) internal successors, (112), 22 states have internal predecessors, (112), 9 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 6 states have call predecessors, (21), 9 states have call successors, (21) Word has length 77 [2022-11-16 12:16:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:58,549 INFO L225 Difference]: With dead ends: 616 [2022-11-16 12:16:58,549 INFO L226 Difference]: Without dead ends: 369 [2022-11-16 12:16:58,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=250, Invalid=1642, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:16:58,552 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 240 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:58,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1071 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1749 Invalid, 0 Unknown, 439 Unchecked, 1.6s Time] [2022-11-16 12:16:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-16 12:16:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 341. [2022-11-16 12:16:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 295 states have (on average 1.4576271186440677) internal successors, (430), 299 states have internal predecessors, (430), 26 states have call successors, (26), 17 states have call predecessors, (26), 19 states have return successors, (36), 24 states have call predecessors, (36), 25 states have call successors, (36) [2022-11-16 12:16:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 492 transitions. [2022-11-16 12:16:58,582 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 492 transitions. Word has length 77 [2022-11-16 12:16:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:58,582 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 492 transitions. [2022-11-16 12:16:58,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 4.869565217391305) internal successors, (112), 22 states have internal predecessors, (112), 9 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 6 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-16 12:16:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 492 transitions. [2022-11-16 12:16:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:16:58,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:58,585 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:16:58,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:58,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:16:58,798 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:58,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:58,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1085154871, now seen corresponding path program 1 times [2022-11-16 12:16:58,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:58,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954734710] [2022-11-16 12:16:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:58,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:59,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:16:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:59,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:16:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:59,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:16:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:59,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:16:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:59,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:16:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:59,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:16:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:59,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:16:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:00,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-16 12:17:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:17:00,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:00,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954734710] [2022-11-16 12:17:00,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954734710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:00,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060330315] [2022-11-16 12:17:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:00,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:00,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:00,044 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:00,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:17:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:00,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 12:17:00,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:00,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:17:01,538 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-16 12:17:01,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 30 [2022-11-16 12:17:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:17:02,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:17:02,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:17:02,048 INFO L321 Elim1Store]: treesize reduction 71, result has 1.4 percent of original size [2022-11-16 12:17:02,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 23 [2022-11-16 12:17:02,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:17:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:17:02,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:02,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060330315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:02,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:17:02,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-16 12:17:02,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152550468] [2022-11-16 12:17:02,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:02,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:17:02,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:17:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-16 12:17:02,517 INFO L87 Difference]: Start difference. First operand 341 states and 492 transitions. Second operand has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:17:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:03,276 INFO L93 Difference]: Finished difference Result 383 states and 542 transitions. [2022-11-16 12:17:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:17:03,276 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 78 [2022-11-16 12:17:03,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:03,278 INFO L225 Difference]: With dead ends: 383 [2022-11-16 12:17:03,278 INFO L226 Difference]: Without dead ends: 348 [2022-11-16 12:17:03,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=1398, Unknown=1, NotChecked=0, Total=1560 [2022-11-16 12:17:03,280 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 49 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 733 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:03,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1719 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 219 Invalid, 0 Unknown, 733 Unchecked, 0.3s Time] [2022-11-16 12:17:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-16 12:17:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 341. [2022-11-16 12:17:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 295 states have (on average 1.4576271186440677) internal successors, (430), 299 states have internal predecessors, (430), 26 states have call successors, (26), 17 states have call predecessors, (26), 19 states have return successors, (36), 24 states have call predecessors, (36), 25 states have call successors, (36) [2022-11-16 12:17:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 492 transitions. [2022-11-16 12:17:03,310 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 492 transitions. Word has length 78 [2022-11-16 12:17:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:03,310 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 492 transitions. [2022-11-16 12:17:03,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:17:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 492 transitions. [2022-11-16 12:17:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:17:03,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:03,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:17:03,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:03,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:03,524 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:03,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1452243686, now seen corresponding path program 1 times [2022-11-16 12:17:03,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:03,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201903346] [2022-11-16 12:17:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:03,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:25,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:17:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:25,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:17:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:25,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:17:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:25,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:17:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:25,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:17:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:25,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:17:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:26,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:17:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:26,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-16 12:17:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:17:26,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:26,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201903346] [2022-11-16 12:17:26,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201903346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:26,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34975359] [2022-11-16 12:17:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:26,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:26,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:26,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:26,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:17:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:26,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 12:17:26,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:26,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:17:27,724 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:17:27,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:17:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:17:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:17:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:17:28,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 28 [2022-11-16 12:17:28,107 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-16 12:17:28,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-16 12:17:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:17:28,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:28,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34975359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:28,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:17:28,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-11-16 12:17:28,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844459503] [2022-11-16 12:17:28,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:28,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:17:28,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:28,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:17:28,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1002, Unknown=6, NotChecked=0, Total=1122 [2022-11-16 12:17:28,904 INFO L87 Difference]: Start difference. First operand 341 states and 492 transitions. Second operand has 29 states, 27 states have (on average 3.925925925925926) internal successors, (106), 24 states have internal predecessors, (106), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:17:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:31,006 INFO L93 Difference]: Finished difference Result 461 states and 663 transitions. [2022-11-16 12:17:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 12:17:31,007 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.925925925925926) internal successors, (106), 24 states have internal predecessors, (106), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 79 [2022-11-16 12:17:31,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:31,009 INFO L225 Difference]: With dead ends: 461 [2022-11-16 12:17:31,010 INFO L226 Difference]: Without dead ends: 416 [2022-11-16 12:17:31,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=264, Invalid=2581, Unknown=17, NotChecked=0, Total=2862 [2022-11-16 12:17:31,012 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 198 mSDsluCounter, 2872 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 3090 SdHoareTripleChecker+Invalid, 3541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2217 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:31,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 3090 Invalid, 3541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1262 Invalid, 0 Unknown, 2217 Unchecked, 1.2s Time] [2022-11-16 12:17:31,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-16 12:17:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 387. [2022-11-16 12:17:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 339 states have (on average 1.4601769911504425) internal successors, (495), 343 states have internal predecessors, (495), 27 states have call successors, (27), 18 states have call predecessors, (27), 20 states have return successors, (40), 25 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-16 12:17:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 562 transitions. [2022-11-16 12:17:31,045 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 562 transitions. Word has length 79 [2022-11-16 12:17:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:31,045 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 562 transitions. [2022-11-16 12:17:31,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.925925925925926) internal successors, (106), 24 states have internal predecessors, (106), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:17:31,046 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 562 transitions. [2022-11-16 12:17:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 12:17:31,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:31,048 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:17:31,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:31,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:17:31,258 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:31,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1547441916, now seen corresponding path program 1 times [2022-11-16 12:17:31,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:31,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974888202] [2022-11-16 12:17:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:31,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:32,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:17:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:32,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:17:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:32,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:17:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:32,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:17:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:32,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:17:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:32,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:17:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:32,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:17:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:32,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:17:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:17:32,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:32,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974888202] [2022-11-16 12:17:32,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974888202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:32,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160353578] [2022-11-16 12:17:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:32,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:32,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:32,329 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:32,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:17:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 12:17:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:33,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:17:33,898 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:17:33,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:17:34,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:17:34,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:17:34,284 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:17:34,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2022-11-16 12:17:34,303 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:17:34,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:17:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:17:34,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:35,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160353578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:35,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:17:35,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-11-16 12:17:35,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474747122] [2022-11-16 12:17:35,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:17:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:17:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=999, Unknown=9, NotChecked=0, Total=1122 [2022-11-16 12:17:35,076 INFO L87 Difference]: Start difference. First operand 387 states and 562 transitions. Second operand has 29 states, 27 states have (on average 4.0) internal successors, (108), 24 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:17:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:36,768 INFO L93 Difference]: Finished difference Result 437 states and 624 transitions. [2022-11-16 12:17:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:17:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 4.0) internal successors, (108), 24 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 80 [2022-11-16 12:17:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:36,771 INFO L225 Difference]: With dead ends: 437 [2022-11-16 12:17:36,771 INFO L226 Difference]: Without dead ends: 402 [2022-11-16 12:17:36,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=258, Invalid=2375, Unknown=19, NotChecked=0, Total=2652 [2022-11-16 12:17:36,773 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 55 mSDsluCounter, 1915 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:36,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2065 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 818 Invalid, 0 Unknown, 707 Unchecked, 0.8s Time] [2022-11-16 12:17:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-16 12:17:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 387. [2022-11-16 12:17:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 339 states have (on average 1.4601769911504425) internal successors, (495), 343 states have internal predecessors, (495), 27 states have call successors, (27), 18 states have call predecessors, (27), 20 states have return successors, (40), 25 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-16 12:17:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 562 transitions. [2022-11-16 12:17:36,803 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 562 transitions. Word has length 80 [2022-11-16 12:17:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:36,804 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 562 transitions. [2022-11-16 12:17:36,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 4.0) internal successors, (108), 24 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:17:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 562 transitions. [2022-11-16 12:17:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 12:17:36,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:36,806 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:17:36,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:37,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:37,017 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:37,017 INFO L85 PathProgramCache]: Analyzing trace with hash -236206099, now seen corresponding path program 1 times [2022-11-16 12:17:37,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:37,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569670565] [2022-11-16 12:17:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:37,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:37,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:17:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:37,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:17:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:37,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:17:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:37,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:17:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:37,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:17:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:37,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:17:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:37,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:17:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:37,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:17:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:17:37,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:37,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569670565] [2022-11-16 12:17:37,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569670565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:37,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:17:37,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:17:37,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828978555] [2022-11-16 12:17:37,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:37,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:17:37,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:17:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:17:37,271 INFO L87 Difference]: Start difference. First operand 387 states and 562 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:17:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:37,590 INFO L93 Difference]: Finished difference Result 501 states and 724 transitions. [2022-11-16 12:17:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:17:37,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-11-16 12:17:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:37,593 INFO L225 Difference]: With dead ends: 501 [2022-11-16 12:17:37,593 INFO L226 Difference]: Without dead ends: 404 [2022-11-16 12:17:37,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:17:37,595 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 32 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:37,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 340 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:17:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-16 12:17:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2022-11-16 12:17:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 346 states have (on average 1.4132947976878614) internal successors, (489), 350 states have internal predecessors, (489), 27 states have call successors, (27), 18 states have call predecessors, (27), 20 states have return successors, (40), 25 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-16 12:17:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 556 transitions. [2022-11-16 12:17:37,626 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 556 transitions. Word has length 80 [2022-11-16 12:17:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:37,626 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 556 transitions. [2022-11-16 12:17:37,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:17:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 556 transitions. [2022-11-16 12:17:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 12:17:37,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:37,629 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:17:37,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 12:17:37,629 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:17:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1687021935, now seen corresponding path program 1 times [2022-11-16 12:17:37,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:37,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257938092] [2022-11-16 12:17:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:37,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:36,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:18:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:36,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:36,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:18:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:18:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:36,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:18:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:36,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:18:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:36,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:18:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:18:36,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:36,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257938092] [2022-11-16 12:18:36,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257938092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:36,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972137380] [2022-11-16 12:18:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:36,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:36,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:36,912 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:36,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:18:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:37,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:18:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:37,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:18:38,440 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-16 12:18:38,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 26 [2022-11-16 12:18:38,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:38,949 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2022-11-16 12:18:38,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 28 [2022-11-16 12:18:38,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:18:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:18:38,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:39,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972137380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:39,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:18:39,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2022-11-16 12:18:39,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456469618] [2022-11-16 12:18:39,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:39,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:18:39,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:39,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:18:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=894, Unknown=1, NotChecked=0, Total=992 [2022-11-16 12:18:39,445 INFO L87 Difference]: Start difference. First operand 394 states and 556 transitions. Second operand has 27 states, 25 states have (on average 4.28) internal successors, (107), 23 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:18:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:40,483 INFO L93 Difference]: Finished difference Result 447 states and 623 transitions. [2022-11-16 12:18:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:18:40,484 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.28) internal successors, (107), 23 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 80 [2022-11-16 12:18:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:40,486 INFO L225 Difference]: With dead ends: 447 [2022-11-16 12:18:40,487 INFO L226 Difference]: Without dead ends: 404 [2022-11-16 12:18:40,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=178, Invalid=1712, Unknown=2, NotChecked=0, Total=1892 [2022-11-16 12:18:40,488 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 43 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:40,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1560 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 570 Invalid, 0 Unknown, 473 Unchecked, 0.5s Time] [2022-11-16 12:18:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-16 12:18:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 390. [2022-11-16 12:18:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 342 states have (on average 1.4181286549707601) internal successors, (485), 346 states have internal predecessors, (485), 27 states have call successors, (27), 18 states have call predecessors, (27), 20 states have return successors, (40), 25 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-16 12:18:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 552 transitions. [2022-11-16 12:18:40,520 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 552 transitions. Word has length 80 [2022-11-16 12:18:40,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:40,520 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 552 transitions. [2022-11-16 12:18:40,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.28) internal successors, (107), 23 states have internal predecessors, (107), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:18:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 552 transitions. [2022-11-16 12:18:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 12:18:40,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:40,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:18:40,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 12:18:40,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:40,733 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1553008429, now seen corresponding path program 1 times [2022-11-16 12:18:40,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:40,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774556231] [2022-11-16 12:18:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:40,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:41,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:18:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:41,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:41,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:41,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:18:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:18:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:41,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:18:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:41,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:18:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:41,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:18:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:18:41,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:41,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774556231] [2022-11-16 12:18:41,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774556231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:41,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886815876] [2022-11-16 12:18:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:41,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:41,902 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:41,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:18:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-16 12:18:42,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:42,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:18:43,459 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:18:43,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:18:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:43,813 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:18:43,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2022-11-16 12:18:43,837 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:18:43,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:18:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:18:44,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:44,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886815876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:44,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:18:44,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2022-11-16 12:18:44,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519147831] [2022-11-16 12:18:44,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:44,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:18:44,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:44,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:18:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1067, Unknown=8, NotChecked=0, Total=1190 [2022-11-16 12:18:44,618 INFO L87 Difference]: Start difference. First operand 390 states and 552 transitions. Second operand has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:18:46,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:46,157 INFO L93 Difference]: Finished difference Result 458 states and 648 transitions. [2022-11-16 12:18:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:18:46,158 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 80 [2022-11-16 12:18:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:46,160 INFO L225 Difference]: With dead ends: 458 [2022-11-16 12:18:46,160 INFO L226 Difference]: Without dead ends: 415 [2022-11-16 12:18:46,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=247, Invalid=2490, Unknown=19, NotChecked=0, Total=2756 [2022-11-16 12:18:46,162 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 56 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1930 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:46,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1930 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 929 Invalid, 0 Unknown, 497 Unchecked, 0.8s Time] [2022-11-16 12:18:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-16 12:18:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 390. [2022-11-16 12:18:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 342 states have (on average 1.4181286549707601) internal successors, (485), 346 states have internal predecessors, (485), 27 states have call successors, (27), 18 states have call predecessors, (27), 20 states have return successors, (40), 25 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-16 12:18:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 552 transitions. [2022-11-16 12:18:46,195 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 552 transitions. Word has length 80 [2022-11-16 12:18:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:46,195 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 552 transitions. [2022-11-16 12:18:46,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:18:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 552 transitions. [2022-11-16 12:18:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 12:18:46,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:46,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:18:46,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-16 12:18:46,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:46,408 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:46,409 INFO L85 PathProgramCache]: Analyzing trace with hash 105103528, now seen corresponding path program 1 times [2022-11-16 12:18:46,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:46,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881391120] [2022-11-16 12:18:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:46,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:18:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-16 12:18:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 12:18:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-16 12:18:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-16 12:18:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 12:18:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:18:47,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:47,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881391120] [2022-11-16 12:18:47,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881391120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:47,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701267225] [2022-11-16 12:18:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:47,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:47,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:47,146 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:47,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:18:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:18:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:18:47,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:18:47,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701267225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:47,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:18:47,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2022-11-16 12:18:47,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399587384] [2022-11-16 12:18:47,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:47,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:18:47,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:18:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:18:47,982 INFO L87 Difference]: Start difference. First operand 390 states and 552 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:18:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:48,114 INFO L93 Difference]: Finished difference Result 689 states and 993 transitions. [2022-11-16 12:18:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:18:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 80 [2022-11-16 12:18:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:48,119 INFO L225 Difference]: With dead ends: 689 [2022-11-16 12:18:48,120 INFO L226 Difference]: Without dead ends: 400 [2022-11-16 12:18:48,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:18:48,121 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 13 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:48,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1429 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-16 12:18:48,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 395. [2022-11-16 12:18:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 346 states have (on average 1.4132947976878614) internal successors, (489), 351 states have internal predecessors, (489), 27 states have call successors, (27), 18 states have call predecessors, (27), 21 states have return successors, (44), 25 states have call predecessors, (44), 26 states have call successors, (44) [2022-11-16 12:18:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 560 transitions. [2022-11-16 12:18:48,162 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 560 transitions. Word has length 80 [2022-11-16 12:18:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:48,163 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 560 transitions. [2022-11-16 12:18:48,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:18:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 560 transitions. [2022-11-16 12:18:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-16 12:18:48,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:48,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:18:48,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-16 12:18:48,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 12:18:48,378 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1803966603, now seen corresponding path program 1 times [2022-11-16 12:18:48,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:48,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43437806] [2022-11-16 12:18:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:48,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:49,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:18:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:49,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:49,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:49,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:18:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:18:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:49,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:18:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:49,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:18:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:49,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-16 12:18:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:18:49,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:49,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43437806] [2022-11-16 12:18:49,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43437806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:49,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162990630] [2022-11-16 12:18:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:49,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:49,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:49,895 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:49,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:18:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:50,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 2603 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:18:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:50,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:18:51,465 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-16 12:18:51,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 26 [2022-11-16 12:18:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:52,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:52,004 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2022-11-16 12:18:52,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 28 [2022-11-16 12:18:52,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:18:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:18:52,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:52,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162990630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:52,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:18:52,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-16 12:18:52,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508803431] [2022-11-16 12:18:52,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:52,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:18:52,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:18:52,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-16 12:18:52,404 INFO L87 Difference]: Start difference. First operand 395 states and 560 transitions. Second operand has 26 states, 24 states have (on average 4.541666666666667) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:18:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:53,479 INFO L93 Difference]: Finished difference Result 451 states and 638 transitions. [2022-11-16 12:18:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:18:53,479 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.541666666666667) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 81 [2022-11-16 12:18:53,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:53,482 INFO L225 Difference]: With dead ends: 451 [2022-11-16 12:18:53,482 INFO L226 Difference]: Without dead ends: 411 [2022-11-16 12:18:53,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=185, Invalid=1620, Unknown=1, NotChecked=0, Total=1806 [2022-11-16 12:18:53,484 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 60 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:53,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1483 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 548 Invalid, 0 Unknown, 512 Unchecked, 0.6s Time] [2022-11-16 12:18:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-11-16 12:18:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 395. [2022-11-16 12:18:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 346 states have (on average 1.4132947976878614) internal successors, (489), 351 states have internal predecessors, (489), 27 states have call successors, (27), 18 states have call predecessors, (27), 21 states have return successors, (44), 25 states have call predecessors, (44), 26 states have call successors, (44) [2022-11-16 12:18:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 560 transitions. [2022-11-16 12:18:53,518 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 560 transitions. Word has length 81 [2022-11-16 12:18:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:53,519 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 560 transitions. [2022-11-16 12:18:53,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.541666666666667) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:18:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 560 transitions. [2022-11-16 12:18:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 12:18:53,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:53,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:18:53,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:53,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:18:53,733 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash -384834745, now seen corresponding path program 1 times [2022-11-16 12:18:53,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:53,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954681338] [2022-11-16 12:18:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:53,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:18:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:18:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:18:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:18:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:18:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:18:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:18:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:56,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:18:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:18:56,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954681338] [2022-11-16 12:18:56,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954681338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:56,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:56,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-16 12:18:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704950685] [2022-11-16 12:18:56,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:56,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:18:56,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:18:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:18:56,731 INFO L87 Difference]: Start difference. First operand 395 states and 560 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:18:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:58,993 INFO L93 Difference]: Finished difference Result 454 states and 645 transitions. [2022-11-16 12:18:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:18:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 82 [2022-11-16 12:18:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:58,997 INFO L225 Difference]: With dead ends: 454 [2022-11-16 12:18:58,997 INFO L226 Difference]: Without dead ends: 421 [2022-11-16 12:18:58,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:18:58,999 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 159 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:58,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 534 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2016 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-16 12:18:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-16 12:18:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 407. [2022-11-16 12:18:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 351 states have (on average 1.4074074074074074) internal successors, (494), 357 states have internal predecessors, (494), 33 states have call successors, (33), 18 states have call predecessors, (33), 22 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) [2022-11-16 12:18:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 588 transitions. [2022-11-16 12:18:59,039 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 588 transitions. Word has length 82 [2022-11-16 12:18:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:59,039 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 588 transitions. [2022-11-16 12:18:59,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:18:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 588 transitions. [2022-11-16 12:18:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 12:18:59,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:59,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:18:59,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-16 12:18:59,043 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:18:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:59,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1528323135, now seen corresponding path program 1 times [2022-11-16 12:18:59,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:59,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799745087] [2022-11-16 12:18:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:59,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:19:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:19:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:19:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:19:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:19:00,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:00,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799745087] [2022-11-16 12:19:00,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799745087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:00,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137131814] [2022-11-16 12:19:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:00,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:00,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:00,349 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:00,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:19:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:01,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:19:01,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:01,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:19:01,965 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-16 12:19:01,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 26 [2022-11-16 12:19:02,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:02,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:02,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:02,536 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2022-11-16 12:19:02,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 28 [2022-11-16 12:19:02,559 INFO L321 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2022-11-16 12:19:02,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 25 [2022-11-16 12:19:02,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:19:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:02,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:02,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137131814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:02,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:19:02,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-16 12:19:02,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732818943] [2022-11-16 12:19:02,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:02,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:19:02,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:02,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:19:02,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-16 12:19:02,985 INFO L87 Difference]: Start difference. First operand 407 states and 588 transitions. Second operand has 26 states, 24 states have (on average 4.625) internal successors, (111), 22 states have internal predecessors, (111), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:19:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:04,283 INFO L93 Difference]: Finished difference Result 464 states and 661 transitions. [2022-11-16 12:19:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:19:04,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.625) internal successors, (111), 22 states have internal predecessors, (111), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 82 [2022-11-16 12:19:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:04,286 INFO L225 Difference]: With dead ends: 464 [2022-11-16 12:19:04,286 INFO L226 Difference]: Without dead ends: 424 [2022-11-16 12:19:04,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=175, Invalid=1546, Unknown=1, NotChecked=0, Total=1722 [2022-11-16 12:19:04,288 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 119 mSDsluCounter, 1785 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1305 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:04,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1956 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 844 Invalid, 0 Unknown, 1305 Unchecked, 0.8s Time] [2022-11-16 12:19:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-16 12:19:04,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 407. [2022-11-16 12:19:04,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 351 states have (on average 1.4074074074074074) internal successors, (494), 357 states have internal predecessors, (494), 33 states have call successors, (33), 18 states have call predecessors, (33), 22 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) [2022-11-16 12:19:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 588 transitions. [2022-11-16 12:19:04,328 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 588 transitions. Word has length 82 [2022-11-16 12:19:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:04,328 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 588 transitions. [2022-11-16 12:19:04,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.625) internal successors, (111), 22 states have internal predecessors, (111), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:19:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 588 transitions. [2022-11-16 12:19:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 12:19:04,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:04,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:04,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:04,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:19:04,546 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash 400956781, now seen corresponding path program 1 times [2022-11-16 12:19:04,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:04,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605354731] [2022-11-16 12:19:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:04,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:05,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:05,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:05,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:05,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:05,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:19:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:05,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:19:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:05,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:19:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:05,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:19:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:19:05,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:05,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605354731] [2022-11-16 12:19:05,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605354731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:05,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405374252] [2022-11-16 12:19:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:05,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:05,578 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:05,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:19:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:19:06,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:19:06,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:19:06,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405374252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:06,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:19:06,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-11-16 12:19:06,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294900912] [2022-11-16 12:19:06,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:06,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:19:06,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:06,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:19:06,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:19:06,446 INFO L87 Difference]: Start difference. First operand 407 states and 588 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:19:06,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:06,795 INFO L93 Difference]: Finished difference Result 731 states and 1077 transitions. [2022-11-16 12:19:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:19:06,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-11-16 12:19:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:06,798 INFO L225 Difference]: With dead ends: 731 [2022-11-16 12:19:06,798 INFO L226 Difference]: Without dead ends: 407 [2022-11-16 12:19:06,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:19:06,800 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 19 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:06,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 548 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-11-16 12:19:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-16 12:19:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-11-16 12:19:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 351 states have (on average 1.4017094017094016) internal successors, (492), 357 states have internal predecessors, (492), 33 states have call successors, (33), 18 states have call predecessors, (33), 22 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) [2022-11-16 12:19:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 586 transitions. [2022-11-16 12:19:06,878 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 586 transitions. Word has length 82 [2022-11-16 12:19:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:06,879 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 586 transitions. [2022-11-16 12:19:06,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:19:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 586 transitions. [2022-11-16 12:19:06,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 12:19:06,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:06,882 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:06,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:07,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:07,092 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:07,092 INFO L85 PathProgramCache]: Analyzing trace with hash 961656559, now seen corresponding path program 1 times [2022-11-16 12:19:07,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:07,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971645365] [2022-11-16 12:19:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:07,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:07,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:07,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:07,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:07,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:07,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:19:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:07,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:19:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:07,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:19:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:07,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:19:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 12:19:07,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:07,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971645365] [2022-11-16 12:19:07,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971645365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:07,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807078086] [2022-11-16 12:19:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:07,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:07,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:07,863 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:07,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:19:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 12:19:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:08,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:19:08,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:19:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:19:09,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:19:09,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807078086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:09,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:19:09,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 20 [2022-11-16 12:19:09,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719161051] [2022-11-16 12:19:09,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:09,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:19:09,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:19:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:19:09,278 INFO L87 Difference]: Start difference. First operand 407 states and 586 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 12:19:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:09,492 INFO L93 Difference]: Finished difference Result 728 states and 1055 transitions. [2022-11-16 12:19:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:19:09,492 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 82 [2022-11-16 12:19:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:09,495 INFO L225 Difference]: With dead ends: 728 [2022-11-16 12:19:09,495 INFO L226 Difference]: Without dead ends: 417 [2022-11-16 12:19:09,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:19:09,497 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 22 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:09,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1609 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-16 12:19:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-16 12:19:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 408. [2022-11-16 12:19:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 352 states have (on average 1.4005681818181819) internal successors, (493), 358 states have internal predecessors, (493), 33 states have call successors, (33), 18 states have call predecessors, (33), 22 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) [2022-11-16 12:19:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 587 transitions. [2022-11-16 12:19:09,535 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 587 transitions. Word has length 82 [2022-11-16 12:19:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:09,536 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 587 transitions. [2022-11-16 12:19:09,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 12:19:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 587 transitions. [2022-11-16 12:19:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 12:19:09,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:09,539 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:09,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:09,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:09,749 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1640928813, now seen corresponding path program 1 times [2022-11-16 12:19:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:09,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613507928] [2022-11-16 12:19:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:09,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:09,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:09,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:09,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:09,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:09,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-16 12:19:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:09,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:19:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 12:19:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:19:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 12:19:10,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613507928] [2022-11-16 12:19:10,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613507928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546105557] [2022-11-16 12:19:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:10,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:10,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:10,051 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:10,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:19:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:10,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:19:10,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:19:10,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:19:10,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546105557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:10,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:19:10,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-16 12:19:10,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084605325] [2022-11-16 12:19:10,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:10,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:19:10,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:19:10,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:19:10,818 INFO L87 Difference]: Start difference. First operand 408 states and 587 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:19:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:10,868 INFO L93 Difference]: Finished difference Result 742 states and 1076 transitions. [2022-11-16 12:19:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:19:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-11-16 12:19:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:10,870 INFO L225 Difference]: With dead ends: 742 [2022-11-16 12:19:10,870 INFO L226 Difference]: Without dead ends: 414 [2022-11-16 12:19:10,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:19:10,878 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 9 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:10,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 540 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:19:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-16 12:19:10,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 405. [2022-11-16 12:19:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 353 states have (on average 1.3937677053824362) internal successors, (492), 359 states have internal predecessors, (492), 29 states have call successors, (29), 18 states have call predecessors, (29), 22 states have return successors, (51), 27 states have call predecessors, (51), 28 states have call successors, (51) [2022-11-16 12:19:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 572 transitions. [2022-11-16 12:19:10,918 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 572 transitions. Word has length 82 [2022-11-16 12:19:10,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:10,918 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 572 transitions. [2022-11-16 12:19:10,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 12:19:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 572 transitions. [2022-11-16 12:19:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 12:19:10,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:10,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:10,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:11,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:19:11,136 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash 149743056, now seen corresponding path program 1 times [2022-11-16 12:19:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:11,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045068478] [2022-11-16 12:19:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:11,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:12,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:12,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:12,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:12,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:19:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:12,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:12,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:19:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:12,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:19:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:12,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:19:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:19:12,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:12,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045068478] [2022-11-16 12:19:12,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045068478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:12,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031568680] [2022-11-16 12:19:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:12,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:12,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:12,305 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:12,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:19:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 12:19:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:13,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:19:14,014 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:19:14,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:19:14,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:14,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:14,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:14,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 28 [2022-11-16 12:19:14,427 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-16 12:19:14,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-16 12:19:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:14,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:15,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031568680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:15,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:19:15,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-11-16 12:19:15,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898158759] [2022-11-16 12:19:15,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:15,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:19:15,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:19:15,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1001, Unknown=7, NotChecked=0, Total=1122 [2022-11-16 12:19:15,170 INFO L87 Difference]: Start difference. First operand 405 states and 572 transitions. Second operand has 29 states, 27 states have (on average 4.222222222222222) internal successors, (114), 24 states have internal predecessors, (114), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:19:16,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:16,797 INFO L93 Difference]: Finished difference Result 459 states and 635 transitions. [2022-11-16 12:19:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:19:16,798 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 4.222222222222222) internal successors, (114), 24 states have internal predecessors, (114), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 83 [2022-11-16 12:19:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:16,800 INFO L225 Difference]: With dead ends: 459 [2022-11-16 12:19:16,800 INFO L226 Difference]: Without dead ends: 417 [2022-11-16 12:19:16,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=254, Invalid=2383, Unknown=15, NotChecked=0, Total=2652 [2022-11-16 12:19:16,801 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 79 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 533 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:16,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1614 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 800 Invalid, 0 Unknown, 533 Unchecked, 0.8s Time] [2022-11-16 12:19:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-16 12:19:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 405. [2022-11-16 12:19:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 353 states have (on average 1.3937677053824362) internal successors, (492), 359 states have internal predecessors, (492), 29 states have call successors, (29), 18 states have call predecessors, (29), 22 states have return successors, (51), 27 states have call predecessors, (51), 28 states have call successors, (51) [2022-11-16 12:19:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 572 transitions. [2022-11-16 12:19:16,839 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 572 transitions. Word has length 83 [2022-11-16 12:19:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:16,840 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 572 transitions. [2022-11-16 12:19:16,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 4.222222222222222) internal successors, (114), 24 states have internal predecessors, (114), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 12:19:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 572 transitions. [2022-11-16 12:19:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 12:19:16,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:16,842 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:16,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:17,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:17,052 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:17,052 INFO L85 PathProgramCache]: Analyzing trace with hash -853396441, now seen corresponding path program 1 times [2022-11-16 12:19:17,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:17,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663682934] [2022-11-16 12:19:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:17,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:17,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:17,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:17,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:18,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:19:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:18,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:19:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:18,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:19:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:18,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:19:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:19:18,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663682934] [2022-11-16 12:19:18,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663682934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844532986] [2022-11-16 12:19:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:18,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:18,243 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:18,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:19:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:19,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 2611 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 12:19:19,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:19,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:19:19,902 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-16 12:19:19,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2022-11-16 12:19:20,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:20,599 INFO L321 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2022-11-16 12:19:20,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 93 [2022-11-16 12:19:20,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:19:20,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 12:19:20,647 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-16 12:19:20,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:19:20,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 15 [2022-11-16 12:19:20,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 12:19:20,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:19:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:20,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:21,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844532986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:21,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:19:21,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2022-11-16 12:19:21,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635040864] [2022-11-16 12:19:21,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:21,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:19:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:19:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=894, Unknown=1, NotChecked=0, Total=992 [2022-11-16 12:19:21,150 INFO L87 Difference]: Start difference. First operand 405 states and 572 transitions. Second operand has 27 states, 25 states have (on average 4.52) internal successors, (113), 23 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:19:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:22,848 INFO L93 Difference]: Finished difference Result 469 states and 651 transitions. [2022-11-16 12:19:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 12:19:22,848 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.52) internal successors, (113), 23 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 83 [2022-11-16 12:19:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:22,851 INFO L225 Difference]: With dead ends: 469 [2022-11-16 12:19:22,851 INFO L226 Difference]: Without dead ends: 419 [2022-11-16 12:19:22,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=212, Invalid=1948, Unknown=2, NotChecked=0, Total=2162 [2022-11-16 12:19:22,852 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 89 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 887 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:22,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 1943 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1101 Invalid, 0 Unknown, 887 Unchecked, 1.0s Time] [2022-11-16 12:19:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-16 12:19:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 401. [2022-11-16 12:19:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 349 states have (on average 1.3982808022922637) internal successors, (488), 355 states have internal predecessors, (488), 29 states have call successors, (29), 18 states have call predecessors, (29), 22 states have return successors, (51), 27 states have call predecessors, (51), 28 states have call successors, (51) [2022-11-16 12:19:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 568 transitions. [2022-11-16 12:19:22,891 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 568 transitions. Word has length 83 [2022-11-16 12:19:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:22,891 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 568 transitions. [2022-11-16 12:19:22,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.52) internal successors, (113), 23 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:19:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 568 transitions. [2022-11-16 12:19:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 12:19:22,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:22,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:22,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-16 12:19:23,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:23,104 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -987409947, now seen corresponding path program 1 times [2022-11-16 12:19:23,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:23,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47329880] [2022-11-16 12:19:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:23,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:23,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:24,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:24,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:24,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:19:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:24,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:24,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:19:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:24,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:19:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:24,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:19:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:19:24,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:24,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47329880] [2022-11-16 12:19:24,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47329880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:24,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354405795] [2022-11-16 12:19:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:24,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:24,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:24,314 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:24,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 12:19:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:25,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 2609 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:19:25,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:25,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:19:25,969 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:19:25,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:19:26,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:26,589 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-16 12:19:26,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-16 12:19:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:26,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:26,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354405795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:26,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:19:26,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2022-11-16 12:19:26,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238892631] [2022-11-16 12:19:26,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:26,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:19:26,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:26,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:19:26,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=950, Unknown=1, NotChecked=0, Total=1056 [2022-11-16 12:19:26,986 INFO L87 Difference]: Start difference. First operand 401 states and 568 transitions. Second operand has 28 states, 26 states have (on average 4.346153846153846) internal successors, (113), 24 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:19:28,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:28,488 INFO L93 Difference]: Finished difference Result 467 states and 649 transitions. [2022-11-16 12:19:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:19:28,489 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 4.346153846153846) internal successors, (113), 24 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 83 [2022-11-16 12:19:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:28,491 INFO L225 Difference]: With dead ends: 467 [2022-11-16 12:19:28,491 INFO L226 Difference]: Without dead ends: 417 [2022-11-16 12:19:28,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=235, Invalid=2210, Unknown=5, NotChecked=0, Total=2450 [2022-11-16 12:19:28,493 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 81 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 933 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:28,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1750 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 817 Invalid, 0 Unknown, 933 Unchecked, 0.8s Time] [2022-11-16 12:19:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-16 12:19:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 401. [2022-11-16 12:19:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 349 states have (on average 1.3982808022922637) internal successors, (488), 355 states have internal predecessors, (488), 29 states have call successors, (29), 18 states have call predecessors, (29), 22 states have return successors, (51), 27 states have call predecessors, (51), 28 states have call successors, (51) [2022-11-16 12:19:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 568 transitions. [2022-11-16 12:19:28,536 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 568 transitions. Word has length 83 [2022-11-16 12:19:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:28,537 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 568 transitions. [2022-11-16 12:19:28,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 4.346153846153846) internal successors, (113), 24 states have internal predecessors, (113), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-16 12:19:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 568 transitions. [2022-11-16 12:19:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 12:19:28,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:28,539 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:28,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-16 12:19:28,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:28,751 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:28,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1019997721, now seen corresponding path program 1 times [2022-11-16 12:19:28,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:28,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944348752] [2022-11-16 12:19:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:28,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:30,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:30,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:30,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:30,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:19:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:30,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:30,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:19:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:19:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:31,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:19:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:19:31,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:31,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944348752] [2022-11-16 12:19:31,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944348752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:31,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134454422] [2022-11-16 12:19:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:31,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:31,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:31,406 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:31,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 12:19:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:32,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 12:19:32,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:32,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:19:33,171 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-16 12:19:33,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:19:33,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:33,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:33,612 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:19:33,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2022-11-16 12:19:33,641 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:19:33,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:19:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:19:34,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:34,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134454422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:34,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:19:34,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2022-11-16 12:19:34,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173828141] [2022-11-16 12:19:34,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:34,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:19:34,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:34,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:19:34,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1186, Unknown=2, NotChecked=0, Total=1332 [2022-11-16 12:19:34,404 INFO L87 Difference]: Start difference. First operand 401 states and 568 transitions. Second operand has 34 states, 31 states have (on average 3.870967741935484) internal successors, (120), 29 states have internal predecessors, (120), 12 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (16), 9 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-16 12:19:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:36,375 INFO L93 Difference]: Finished difference Result 464 states and 651 transitions. [2022-11-16 12:19:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:19:36,376 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.870967741935484) internal successors, (120), 29 states have internal predecessors, (120), 12 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (16), 9 states have call predecessors, (16), 11 states have call successors, (16) Word has length 84 [2022-11-16 12:19:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:36,377 INFO L225 Difference]: With dead ends: 464 [2022-11-16 12:19:36,377 INFO L226 Difference]: Without dead ends: 418 [2022-11-16 12:19:36,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=331, Invalid=2529, Unknown=2, NotChecked=0, Total=2862 [2022-11-16 12:19:36,378 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 430 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 864 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:36,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1074 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 774 Invalid, 0 Unknown, 864 Unchecked, 1.0s Time] [2022-11-16 12:19:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-16 12:19:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 309. [2022-11-16 12:19:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 260 states have (on average 1.373076923076923) internal successors, (357), 265 states have internal predecessors, (357), 28 states have call successors, (28), 17 states have call predecessors, (28), 20 states have return successors, (41), 26 states have call predecessors, (41), 27 states have call successors, (41) [2022-11-16 12:19:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 426 transitions. [2022-11-16 12:19:36,405 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 426 transitions. Word has length 84 [2022-11-16 12:19:36,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:36,405 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 426 transitions. [2022-11-16 12:19:36,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.870967741935484) internal successors, (120), 29 states have internal predecessors, (120), 12 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (16), 9 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-16 12:19:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 426 transitions. [2022-11-16 12:19:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 12:19:36,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:36,407 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:36,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:36,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 12:19:36,617 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:36,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1621793823, now seen corresponding path program 2 times [2022-11-16 12:19:36,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:36,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478349538] [2022-11-16 12:19:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:36,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:37,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:37,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:37,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:19:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:37,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:37,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 12:19:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:37,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:19:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:37,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-16 12:19:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:19:37,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:37,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478349538] [2022-11-16 12:19:37,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478349538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:37,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218190155] [2022-11-16 12:19:37,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:19:37,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:37,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:37,709 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:37,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 12:19:39,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:19:39,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:19:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:19:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:40,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:40,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-16 12:19:40,411 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-16 12:19:40,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 12:19:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:19:40,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218190155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:40,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:19:40,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 21 [2022-11-16 12:19:40,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870943952] [2022-11-16 12:19:40,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:40,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:19:40,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:19:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:19:40,428 INFO L87 Difference]: Start difference. First operand 309 states and 426 transitions. Second operand has 21 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 7 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-16 12:19:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:42,259 INFO L93 Difference]: Finished difference Result 538 states and 745 transitions. [2022-11-16 12:19:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:19:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 7 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) Word has length 88 [2022-11-16 12:19:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:42,261 INFO L225 Difference]: With dead ends: 538 [2022-11-16 12:19:42,261 INFO L226 Difference]: Without dead ends: 296 [2022-11-16 12:19:42,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 178 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:19:42,263 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 115 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:42,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1289 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 964 Invalid, 0 Unknown, 469 Unchecked, 1.1s Time] [2022-11-16 12:19:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-16 12:19:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 293. [2022-11-16 12:19:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 249 states have (on average 1.3734939759036144) internal successors, (342), 252 states have internal predecessors, (342), 24 states have call successors, (24), 18 states have call predecessors, (24), 19 states have return successors, (30), 22 states have call predecessors, (30), 23 states have call successors, (30) [2022-11-16 12:19:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 396 transitions. [2022-11-16 12:19:42,298 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 396 transitions. Word has length 88 [2022-11-16 12:19:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:42,299 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 396 transitions. [2022-11-16 12:19:42,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 7 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-16 12:19:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 396 transitions. [2022-11-16 12:19:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-16 12:19:42,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:42,301 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-11-16 12:19:42,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:42,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 12:19:42,505 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1114977175, now seen corresponding path program 1 times [2022-11-16 12:19:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:42,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888429662] [2022-11-16 12:19:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:42,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:42,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:42,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:43,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-16 12:19:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:43,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:19:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:43,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 12:19:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:43,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 12:19:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:43,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 12:19:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:43,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:19:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:43,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-16 12:19:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:43,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:19:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 12:19:43,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888429662] [2022-11-16 12:19:43,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888429662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:43,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:19:43,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 12:19:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953564822] [2022-11-16 12:19:43,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:43,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:19:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:19:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:19:43,120 INFO L87 Difference]: Start difference. First operand 293 states and 396 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-16 12:19:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:43,606 INFO L93 Difference]: Finished difference Result 300 states and 402 transitions. [2022-11-16 12:19:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:19:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 93 [2022-11-16 12:19:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:43,608 INFO L225 Difference]: With dead ends: 300 [2022-11-16 12:19:43,608 INFO L226 Difference]: Without dead ends: 293 [2022-11-16 12:19:43,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:19:43,609 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 45 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:43,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1097 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:19:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-16 12:19:43,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-11-16 12:19:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 249 states have (on average 1.3734939759036144) internal successors, (342), 252 states have internal predecessors, (342), 24 states have call successors, (24), 18 states have call predecessors, (24), 19 states have return successors, (29), 22 states have call predecessors, (29), 23 states have call successors, (29) [2022-11-16 12:19:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 395 transitions. [2022-11-16 12:19:43,630 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 395 transitions. Word has length 93 [2022-11-16 12:19:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:43,631 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 395 transitions. [2022-11-16 12:19:43,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-16 12:19:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 395 transitions. [2022-11-16 12:19:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-16 12:19:43,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:43,632 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:43,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-16 12:19:43,633 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1934298862, now seen corresponding path program 1 times [2022-11-16 12:19:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:43,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218787460] [2022-11-16 12:19:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:43,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:19:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:19:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-16 12:19:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 12:19:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 12:19:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 12:19:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:45,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-16 12:19:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:46,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-16 12:19:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:19:46,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:46,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218787460] [2022-11-16 12:19:46,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218787460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:46,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:19:46,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-11-16 12:19:46,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958821279] [2022-11-16 12:19:46,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:46,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:19:46,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:46,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:19:46,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:19:46,597 INFO L87 Difference]: Start difference. First operand 293 states and 395 transitions. Second operand has 22 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 12:19:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:49,233 INFO L93 Difference]: Finished difference Result 349 states and 462 transitions. [2022-11-16 12:19:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:19:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 93 [2022-11-16 12:19:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:49,236 INFO L225 Difference]: With dead ends: 349 [2022-11-16 12:19:49,236 INFO L226 Difference]: Without dead ends: 314 [2022-11-16 12:19:49,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:19:49,237 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 176 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:49,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 677 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2607 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 12:19:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-16 12:19:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 297. [2022-11-16 12:19:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 251 states have (on average 1.3705179282868525) internal successors, (344), 255 states have internal predecessors, (344), 25 states have call successors, (25), 18 states have call predecessors, (25), 20 states have return successors, (33), 23 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-16 12:19:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 402 transitions. [2022-11-16 12:19:49,274 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 402 transitions. Word has length 93 [2022-11-16 12:19:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:49,275 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 402 transitions. [2022-11-16 12:19:49,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 12:19:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 402 transitions. [2022-11-16 12:19:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-16 12:19:49,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:49,277 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:49,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-16 12:19:49,277 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1014177130, now seen corresponding path program 1 times [2022-11-16 12:19:49,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:49,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507903436] [2022-11-16 12:19:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:49,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:49,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:49,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:49,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:19:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:49,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:19:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:49,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-16 12:19:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:49,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 12:19:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:49,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:19:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:50,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-16 12:19:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-16 12:19:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:50,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-16 12:19:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-16 12:19:50,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:50,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507903436] [2022-11-16 12:19:50,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507903436] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:50,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286594307] [2022-11-16 12:19:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:50,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:50,099 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:50,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 12:19:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 12:19:50,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:51,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:19:51,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:19:51,585 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-16 12:19:51,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 1 [2022-11-16 12:19:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:19:51,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:19:51,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286594307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:51,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:19:51,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [11] total 23 [2022-11-16 12:19:51,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689136899] [2022-11-16 12:19:51,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:51,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:19:51,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:51,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:19:51,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:19:51,591 INFO L87 Difference]: Start difference. First operand 297 states and 402 transitions. Second operand has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-16 12:19:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:51,756 INFO L93 Difference]: Finished difference Result 537 states and 739 transitions. [2022-11-16 12:19:51,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:19:51,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 93 [2022-11-16 12:19:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:51,757 INFO L225 Difference]: With dead ends: 537 [2022-11-16 12:19:51,758 INFO L226 Difference]: Without dead ends: 326 [2022-11-16 12:19:51,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:19:51,758 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 42 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:51,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 966 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-16 12:19:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-16 12:19:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 316. [2022-11-16 12:19:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 268 states have (on average 1.3544776119402986) internal successors, (363), 273 states have internal predecessors, (363), 25 states have call successors, (25), 19 states have call predecessors, (25), 22 states have return successors, (31), 23 states have call predecessors, (31), 24 states have call successors, (31) [2022-11-16 12:19:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 419 transitions. [2022-11-16 12:19:51,796 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 419 transitions. Word has length 93 [2022-11-16 12:19:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:51,796 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 419 transitions. [2022-11-16 12:19:51,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-16 12:19:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 419 transitions. [2022-11-16 12:19:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-16 12:19:51,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:51,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:51,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:52,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:52,009 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash -766030636, now seen corresponding path program 1 times [2022-11-16 12:19:52,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:52,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346043295] [2022-11-16 12:19:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:52,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:19:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:19:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-16 12:19:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 12:19:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:19:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-16 12:19:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-16 12:19:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-16 12:19:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:19:53,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:53,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346043295] [2022-11-16 12:19:53,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346043295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:53,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760807114] [2022-11-16 12:19:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:53,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:53,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:53,449 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:53,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 12:19:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:54,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2655 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:19:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:19:54,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:19:54,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760807114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:54,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:19:54,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2022-11-16 12:19:54,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647811766] [2022-11-16 12:19:54,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:54,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:19:54,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:19:54,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:19:54,370 INFO L87 Difference]: Start difference. First operand 316 states and 419 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:19:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:54,642 INFO L93 Difference]: Finished difference Result 515 states and 713 transitions. [2022-11-16 12:19:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:19:54,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2022-11-16 12:19:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:54,645 INFO L225 Difference]: With dead ends: 515 [2022-11-16 12:19:54,645 INFO L226 Difference]: Without dead ends: 307 [2022-11-16 12:19:54,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:19:54,646 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 3 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:54,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 424 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-16 12:19:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-16 12:19:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-11-16 12:19:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 260 states have (on average 1.3576923076923078) internal successors, (353), 264 states have internal predecessors, (353), 25 states have call successors, (25), 19 states have call predecessors, (25), 21 states have return successors, (30), 23 states have call predecessors, (30), 24 states have call successors, (30) [2022-11-16 12:19:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 408 transitions. [2022-11-16 12:19:54,680 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 408 transitions. Word has length 93 [2022-11-16 12:19:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:54,680 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 408 transitions. [2022-11-16 12:19:54,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 12:19:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 408 transitions. [2022-11-16 12:19:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 12:19:54,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:54,682 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-16 12:19:54,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:54,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:54,882 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:19:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:54,883 INFO L85 PathProgramCache]: Analyzing trace with hash 619367424, now seen corresponding path program 1 times [2022-11-16 12:19:54,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:54,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246476900] [2022-11-16 12:19:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:54,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:19:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:19:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:19:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:19:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-16 12:19:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-16 12:19:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 12:19:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 12:19:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-16 12:19:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:19:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:19:57,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:57,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246476900] [2022-11-16 12:19:57,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246476900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:57,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259267240] [2022-11-16 12:19:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:57,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:57,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:57,925 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:57,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 12:19:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:58,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 2644 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 12:19:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:59,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:20:15,626 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:20:15,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 12:20:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:20:20,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:20:20,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 33 [2022-11-16 12:20:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:20:24,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:24,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259267240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:24,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:20:24,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [21] total 38 [2022-11-16 12:20:24,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570561794] [2022-11-16 12:20:24,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:24,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:20:24,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:20:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1287, Unknown=10, NotChecked=0, Total=1406 [2022-11-16 12:20:24,717 INFO L87 Difference]: Start difference. First operand 307 states and 408 transitions. Second operand has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 8 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-16 12:20:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:25,322 INFO L93 Difference]: Finished difference Result 364 states and 473 transitions. [2022-11-16 12:20:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:20:25,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 8 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 95 [2022-11-16 12:20:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:25,325 INFO L225 Difference]: With dead ends: 364 [2022-11-16 12:20:25,325 INFO L226 Difference]: Without dead ends: 331 [2022-11-16 12:20:25,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=155, Invalid=1815, Unknown=10, NotChecked=0, Total=1980 [2022-11-16 12:20:25,326 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 155 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:25,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1291 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 367 Invalid, 0 Unknown, 515 Unchecked, 0.3s Time] [2022-11-16 12:20:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-16 12:20:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 321. [2022-11-16 12:20:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 271 states have (on average 1.3468634686346863) internal successors, (365), 276 states have internal predecessors, (365), 26 states have call successors, (26), 20 states have call predecessors, (26), 23 states have return successors, (35), 24 states have call predecessors, (35), 25 states have call successors, (35) [2022-11-16 12:20:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 426 transitions. [2022-11-16 12:20:25,366 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 426 transitions. Word has length 95 [2022-11-16 12:20:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:25,366 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 426 transitions. [2022-11-16 12:20:25,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 8 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-16 12:20:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 426 transitions. [2022-11-16 12:20:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 12:20:25,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:25,368 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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] [2022-11-16 12:20:25,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:25,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 12:20:25,579 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:25,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:25,579 INFO L85 PathProgramCache]: Analyzing trace with hash 599464349, now seen corresponding path program 2 times [2022-11-16 12:20:25,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:25,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875936081] [2022-11-16 12:20:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:25,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:28,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:20:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:28,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:20:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:20:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:28,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:20:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:28,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-16 12:20:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:28,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 12:20:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:20:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:20:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:28,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:20:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:29,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:20:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:20:29,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:29,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875936081] [2022-11-16 12:20:29,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875936081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:29,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:29,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-16 12:20:29,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404153194] [2022-11-16 12:20:29,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:29,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:20:29,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:20:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:20:29,647 INFO L87 Difference]: Start difference. First operand 321 states and 426 transitions. Second operand has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-16 12:20:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:32,805 INFO L93 Difference]: Finished difference Result 374 states and 488 transitions. [2022-11-16 12:20:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:20:32,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 95 [2022-11-16 12:20:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:32,807 INFO L225 Difference]: With dead ends: 374 [2022-11-16 12:20:32,808 INFO L226 Difference]: Without dead ends: 346 [2022-11-16 12:20:32,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:20:32,809 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 174 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 2695 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 2745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:32,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 1169 Invalid, 2745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2695 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 12:20:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-16 12:20:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 332. [2022-11-16 12:20:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 279 states have (on average 1.3369175627240144) internal successors, (373), 286 states have internal predecessors, (373), 27 states have call successors, (27), 20 states have call predecessors, (27), 25 states have return successors, (40), 25 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-16 12:20:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 440 transitions. [2022-11-16 12:20:32,852 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 440 transitions. Word has length 95 [2022-11-16 12:20:32,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:32,853 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 440 transitions. [2022-11-16 12:20:32,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-16 12:20:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 440 transitions. [2022-11-16 12:20:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 12:20:32,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:32,855 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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] [2022-11-16 12:20:32,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-16 12:20:32,855 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash 457571980, now seen corresponding path program 1 times [2022-11-16 12:20:32,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:32,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529341855] [2022-11-16 12:20:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:32,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:40,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 12:20:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:40,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:20:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:40,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:20:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:40,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-16 12:20:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:40,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-16 12:20:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:40,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 12:20:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:40,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:20:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:40,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-16 12:20:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:40,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 12:20:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:41,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-16 12:20:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:20:41,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:41,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529341855] [2022-11-16 12:20:41,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529341855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:20:41,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144328216] [2022-11-16 12:20:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:41,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:41,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:41,761 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:41,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7f6e0ff-b476-41a9-b686-d52b860fe7a4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 12:20:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-16 12:20:42,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:42,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:20:42,944 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:20:42,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:20:43,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:20:45,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:20:45,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 34 [2022-11-16 12:20:45,638 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-16 12:20:45,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2022-11-16 12:20:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:20:46,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:20:46,505 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:20:46,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2022-11-16 12:20:46,531 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 12:20:46,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18