./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ --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 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 --- 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-dbf71c6-m [2022-10-17 11:04:36,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:04:36,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:04:36,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:04:36,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:04:36,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:04:36,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:04:36,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:04:36,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:04:36,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:04:36,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:04:36,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:04:36,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:04:36,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:04:36,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:04:36,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:04:36,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:04:36,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:04:36,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:04:36,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:04:36,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:04:36,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:04:36,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:04:36,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:04:36,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:04:36,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:04:36,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:04:36,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:04:36,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:04:36,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:04:36,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:04:36,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:04:36,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:04:36,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:04:36,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:04:36,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:04:36,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:04:36,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:04:36,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:04:36,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:04:36,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:04:36,162 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-10-17 11:04:36,203 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:04:36,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:04:36,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:04:36,204 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:04:36,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:04:36,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:04:36,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:04:36,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:04:36,207 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:04:36,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:04:36,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:04:36,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:04:36,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:04:36,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:04:36,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:04:36,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:04:36,209 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:04:36,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:04:36,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:04:36,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:04:36,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:04:36,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:04:36,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:04:36,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:04:36,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:04:36,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:04:36,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:04:36,212 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:04:36,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:04:36,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:04:36,214 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_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 [2022-10-17 11:04:36,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:04:36,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:04:36,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:04:36,552 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:04:36,552 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:04:36,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2022-10-17 11:04:36,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/data/05adcff4a/53d17c63a8c343ceb74f4ca212611819/FLAG8a4a616f7 [2022-10-17 11:04:37,517 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:04:37,518 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2022-10-17 11:04:37,573 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/data/05adcff4a/53d17c63a8c343ceb74f4ca212611819/FLAG8a4a616f7 [2022-10-17 11:04:37,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/data/05adcff4a/53d17c63a8c343ceb74f4ca212611819 [2022-10-17 11:04:37,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:04:37,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:04:37,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:04:37,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:04:37,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:04:37,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:04:37" (1/1) ... [2022-10-17 11:04:37,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4818b69a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:37, skipping insertion in model container [2022-10-17 11:04:37,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:04:37" (1/1) ... [2022-10-17 11:04:38,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:04:38,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:04:38,485 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2022-10-17 11:04:38,493 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2022-10-17 11:04:39,802 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:39,803 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:39,804 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:39,805 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:39,806 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:39,821 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:39,830 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:39,832 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:39,835 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,344 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 11:04:40,345 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 11:04:40,350 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 11:04:40,352 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 11:04:40,357 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 11:04:40,361 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 11:04:40,363 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 11:04:40,365 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 11:04:40,367 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 11:04:40,369 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 11:04:40,617 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 11:04:40,770 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,771 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:04:40,927 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:04:40,940 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2022-10-17 11:04:40,941 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2022-10-17 11:04:40,971 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,972 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,972 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,973 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,974 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,979 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,979 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,980 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:40,981 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:41,011 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 11:04:41,012 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 11:04:41,013 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 11:04:41,014 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 11:04:41,014 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 11:04:41,015 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 11:04:41,016 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 11:04:41,016 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 11:04:41,016 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 11:04:41,017 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 11:04:41,035 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 11:04:41,096 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:41,098 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 11:04:41,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:04:41,421 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:04:41,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41 WrapperNode [2022-10-17 11:04:41,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:04:41,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:04:41,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:04:41,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:04:41,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,691 INFO L138 Inliner]: procedures = 691, calls = 2614, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 796 [2022-10-17 11:04:41,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:04:41,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:04:41,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:04:41,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:04:41,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,792 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:04:41,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:04:41,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:04:41,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:04:41,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (1/1) ... [2022-10-17 11:04:41,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:04:41,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:41,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:04:41,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:04:41,943 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-10-17 11:04:41,943 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-10-17 11:04:41,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:04:41,944 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-10-17 11:04:41,944 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-10-17 11:04:41,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 11:04:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 11:04:41,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 11:04:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2022-10-17 11:04:41,945 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2022-10-17 11:04:41,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 11:04:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:04:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 11:04:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:04:41,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:04:41,948 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-10-17 11:04:41,949 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-10-17 11:04:41,949 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 11:04:41,949 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 11:04:41,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:04:41,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 11:04:41,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 11:04:41,950 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-10-17 11:04:41,950 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-10-17 11:04:41,950 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-10-17 11:04:41,950 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-10-17 11:04:41,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 11:04:41,951 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-10-17 11:04:41,951 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-10-17 11:04:41,952 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-10-17 11:04:41,952 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-10-17 11:04:41,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:04:42,304 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:04:42,307 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:04:43,913 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:04:43,922 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:04:43,922 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 11:04:43,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:04:43 BoogieIcfgContainer [2022-10-17 11:04:43,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:04:43,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:04:43,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:04:43,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:04:43,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:04:37" (1/3) ... [2022-10-17 11:04:43,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5410da72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:04:43, skipping insertion in model container [2022-10-17 11:04:43,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:04:41" (2/3) ... [2022-10-17 11:04:43,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5410da72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:04:43, skipping insertion in model container [2022-10-17 11:04:43,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:04:43" (3/3) ... [2022-10-17 11:04:43,935 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_secure_zero_harness.i [2022-10-17 11:04:43,954 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:04:43,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:04:44,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:04:44,038 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;@1eb31b50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:04:44,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:04:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-10-17 11:04:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 11:04:44,057 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:44,058 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-10-17 11:04:44,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:44,066 INFO L85 PathProgramCache]: Analyzing trace with hash -70528239, now seen corresponding path program 1 times [2022-10-17 11:04:44,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:44,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745945350] [2022-10-17 11:04:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:04:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:04:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:04:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-17 11:04:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 11:04:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 11:04:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 11:04:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-10-17 11:04:44,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:44,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745945350] [2022-10-17 11:04:44,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745945350] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:44,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:44,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:04:44,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714912366] [2022-10-17 11:04:44,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:44,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:04:44,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:44,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:04:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:04:44,918 INFO L87 Difference]: Start difference. First operand has 103 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 71 states have internal predecessors, (86), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:04:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:45,182 INFO L93 Difference]: Finished difference Result 202 states and 265 transitions. [2022-10-17 11:04:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:04:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2022-10-17 11:04:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:45,201 INFO L225 Difference]: With dead ends: 202 [2022-10-17 11:04:45,201 INFO L226 Difference]: Without dead ends: 98 [2022-10-17 11:04:45,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:04:45,218 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:45,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 138 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:04:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-10-17 11:04:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-10-17 11:04:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.196969696969697) internal successors, (79), 67 states have internal predecessors, (79), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-10-17 11:04:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2022-10-17 11:04:45,292 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 65 [2022-10-17 11:04:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:45,292 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2022-10-17 11:04:45,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:04:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2022-10-17 11:04:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 11:04:45,299 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:45,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-10-17 11:04:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:04:45,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1061132297, now seen corresponding path program 1 times [2022-10-17 11:04:45,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:45,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226586578] [2022-10-17 11:04:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:45,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:04:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:04:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:04:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-17 11:04:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 11:04:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 11:04:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-10-17 11:04:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 11:04:46,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:46,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226586578] [2022-10-17 11:04:46,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226586578] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:04:46,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442780701] [2022-10-17 11:04:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:46,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:46,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:46,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:46,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:04:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 11:04:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 11:04:46,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:46,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442780701] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:46,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:04:46,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-10-17 11:04:46,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250992822] [2022-10-17 11:04:46,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:46,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 11:04:46,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 11:04:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-10-17 11:04:46,983 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 11:04:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:47,158 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2022-10-17 11:04:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:04:47,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2022-10-17 11:04:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:47,164 INFO L225 Difference]: With dead ends: 174 [2022-10-17 11:04:47,164 INFO L226 Difference]: Without dead ends: 101 [2022-10-17 11:04:47,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-10-17 11:04:47,171 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 140 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:47,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 272 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:04:47,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-10-17 11:04:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-10-17 11:04:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 21 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-10-17 11:04:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2022-10-17 11:04:47,205 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 65 [2022-10-17 11:04:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:47,206 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2022-10-17 11:04:47,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 11:04:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2022-10-17 11:04:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-10-17 11:04:47,214 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:47,214 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 11:04:47,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:47,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:47,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:47,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:47,431 INFO L85 PathProgramCache]: Analyzing trace with hash -883820620, now seen corresponding path program 1 times [2022-10-17 11:04:47,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:47,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81566472] [2022-10-17 11:04:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:47,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:48,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:48,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:04:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:48,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:04:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:48,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:04:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:48,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 11:04:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:48,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 11:04:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:49,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-10-17 11:04:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:49,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-17 11:04:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 11:04:49,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:49,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81566472] [2022-10-17 11:04:49,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81566472] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:04:49,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845770597] [2022-10-17 11:04:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:49,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:49,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:49,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:49,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 11:04:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:49,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 11:04:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 11:04:49,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:49,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845770597] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:49,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:04:49,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-10-17 11:04:49,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080226461] [2022-10-17 11:04:49,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:49,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 11:04:49,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 11:04:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-10-17 11:04:49,798 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 11:04:50,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:50,031 INFO L93 Difference]: Finished difference Result 172 states and 211 transitions. [2022-10-17 11:04:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:04:50,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2022-10-17 11:04:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:50,035 INFO L225 Difference]: With dead ends: 172 [2022-10-17 11:04:50,035 INFO L226 Difference]: Without dead ends: 98 [2022-10-17 11:04:50,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-10-17 11:04:50,040 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 150 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:50,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 413 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:04:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-10-17 11:04:50,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-10-17 11:04:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 67 states have internal predecessors, (78), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-10-17 11:04:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2022-10-17 11:04:50,071 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 71 [2022-10-17 11:04:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:50,073 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2022-10-17 11:04:50,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 11:04:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2022-10-17 11:04:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-17 11:04:50,077 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:50,077 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-10-17 11:04:50,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:50,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash 81192906, now seen corresponding path program 1 times [2022-10-17 11:04:50,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:50,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259352633] [2022-10-17 11:04:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:50,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:04:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:04:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:04:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 11:04:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 11:04:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-10-17 11:04:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-10-17 11:04:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-10-17 11:04:51,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:51,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259352633] [2022-10-17 11:04:51,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259352633] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:51,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:51,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 11:04:51,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528831135] [2022-10-17 11:04:51,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:51,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:04:51,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:04:51,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:04:51,426 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-10-17 11:04:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:51,965 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2022-10-17 11:04:51,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 11:04:51,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2022-10-17 11:04:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:51,968 INFO L225 Difference]: With dead ends: 110 [2022-10-17 11:04:51,968 INFO L226 Difference]: Without dead ends: 108 [2022-10-17 11:04:51,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-10-17 11:04:51,971 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 84 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:51,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 338 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 11:04:51,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-10-17 11:04:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-10-17 11:04:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2022-10-17 11:04:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2022-10-17 11:04:51,982 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 83 [2022-10-17 11:04:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:51,983 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2022-10-17 11:04:51,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-10-17 11:04:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2022-10-17 11:04:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 11:04:51,985 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:51,985 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] [2022-10-17 11:04:51,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 11:04:51,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1920648402, now seen corresponding path program 1 times [2022-10-17 11:04:51,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:51,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122351880] [2022-10-17 11:04:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:51,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:04:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:04:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:04:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 11:04:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 11:04:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-10-17 11:04:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-10-17 11:04:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-10-17 11:04:53,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:53,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122351880] [2022-10-17 11:04:53,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122351880] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:53,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:04:53,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 11:04:53,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248930519] [2022-10-17 11:04:53,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:53,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:04:53,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:04:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:04:53,636 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:04:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:54,160 INFO L93 Difference]: Finished difference Result 214 states and 275 transitions. [2022-10-17 11:04:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:04:54,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2022-10-17 11:04:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:54,163 INFO L225 Difference]: With dead ends: 214 [2022-10-17 11:04:54,163 INFO L226 Difference]: Without dead ends: 132 [2022-10-17 11:04:54,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-10-17 11:04:54,165 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 126 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:54,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 245 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 11:04:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-10-17 11:04:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2022-10-17 11:04:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2022-10-17 11:04:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-10-17 11:04:54,178 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 87 [2022-10-17 11:04:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:54,178 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-10-17 11:04:54,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:04:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-10-17 11:04:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 11:04:54,180 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:54,180 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] [2022-10-17 11:04:54,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 11:04:54,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:54,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:54,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2116153456, now seen corresponding path program 1 times [2022-10-17 11:04:54,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:54,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692431120] [2022-10-17 11:04:54,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:54,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:04:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:04:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:04:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 11:04:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 11:04:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-10-17 11:04:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-10-17 11:04:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-10-17 11:04:56,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:56,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692431120] [2022-10-17 11:04:56,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692431120] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:04:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831247355] [2022-10-17 11:04:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:56,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:56,618 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:56,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 11:04:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:57,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 30 conjunts are in the unsatisfiable core [2022-10-17 11:04:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:57,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 11:04:57,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 11:04:57,594 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-10-17 11:04:57,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-10-17 11:04:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 11:04:57,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:57,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831247355] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:57,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:04:57,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2022-10-17 11:04:57,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348608651] [2022-10-17 11:04:57,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:57,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 11:04:57,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:57,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 11:04:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-10-17 11:04:57,605 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-17 11:04:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:57,690 INFO L93 Difference]: Finished difference Result 222 states and 275 transitions. [2022-10-17 11:04:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 11:04:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 87 [2022-10-17 11:04:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:57,695 INFO L225 Difference]: With dead ends: 222 [2022-10-17 11:04:57,695 INFO L226 Difference]: Without dead ends: 131 [2022-10-17 11:04:57,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-10-17 11:04:57,698 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 25 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:04:57,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 819 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 99 Unchecked, 0.0s Time] [2022-10-17 11:04:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-10-17 11:04:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-10-17 11:04:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 95 states have (on average 1.2) internal successors, (114), 97 states have internal predecessors, (114), 22 states have call successors, (22), 12 states have call predecessors, (22), 13 states have return successors, (25), 21 states have call predecessors, (25), 21 states have call successors, (25) [2022-10-17 11:04:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2022-10-17 11:04:57,717 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 87 [2022-10-17 11:04:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:57,717 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2022-10-17 11:04:57,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 5 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-17 11:04:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2022-10-17 11:04:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 11:04:57,721 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:57,721 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] [2022-10-17 11:04:57,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:57,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:57,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash -729368046, now seen corresponding path program 1 times [2022-10-17 11:04:57,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:57,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183354021] [2022-10-17 11:04:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:04:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:04:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:04:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:04:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:04:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 11:04:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-10-17 11:04:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-10-17 11:04:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-10-17 11:04:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-17 11:04:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:04:58,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183354021] [2022-10-17 11:04:58,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183354021] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:04:58,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278878662] [2022-10-17 11:04:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:58,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:04:58,368 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:04:58,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 11:04:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:04:58,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 11:04:58,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:04:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 11:04:58,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:04:58,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278878662] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:04:58,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:04:58,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-10-17 11:04:58,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445490190] [2022-10-17 11:04:58,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:04:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:04:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:04:58,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:04:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:04:58,881 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:04:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:04:58,911 INFO L93 Difference]: Finished difference Result 231 states and 291 transitions. [2022-10-17 11:04:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:04:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2022-10-17 11:04:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:04:58,913 INFO L225 Difference]: With dead ends: 231 [2022-10-17 11:04:58,913 INFO L226 Difference]: Without dead ends: 140 [2022-10-17 11:04:58,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:04:58,915 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 20 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 349 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 [2022-10-17 11:04:58,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 349 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:04:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-10-17 11:04:58,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2022-10-17 11:04:58,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (24), 21 states have call predecessors, (24), 21 states have call successors, (24) [2022-10-17 11:04:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2022-10-17 11:04:58,926 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 87 [2022-10-17 11:04:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:04:58,926 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2022-10-17 11:04:58,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:04:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2022-10-17 11:04:58,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 11:04:58,928 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:04:58,928 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-10-17 11:04:58,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 11:04:59,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:04:59,150 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:04:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:04:59,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2043691690, now seen corresponding path program 2 times [2022-10-17 11:04:59,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:04:59,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343895046] [2022-10-17 11:04:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:04:59,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:04:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:05:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:05:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:05:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:05:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:05:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-17 11:05:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 11:05:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-10-17 11:05:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-10-17 11:05:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-10-17 11:05:00,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:05:00,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343895046] [2022-10-17 11:05:00,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343895046] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:05:00,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891036375] [2022-10-17 11:05:00,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:05:00,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:05:00,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:05:00,263 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:05:00,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 11:05:00,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 11:05:00,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:05:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 2334 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-17 11:05:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:05:00,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 11:05:00,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 11:05:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-10-17 11:05:01,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:05:01,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891036375] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:01,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:05:01,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-10-17 11:05:01,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900408036] [2022-10-17 11:05:01,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:01,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:05:01,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:05:01,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:05:01,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-10-17 11:05:01,268 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:05:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:01,605 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2022-10-17 11:05:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 11:05:01,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-10-17 11:05:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:01,608 INFO L225 Difference]: With dead ends: 226 [2022-10-17 11:05:01,608 INFO L226 Difference]: Without dead ends: 160 [2022-10-17 11:05:01,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-10-17 11:05:01,610 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 64 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:01,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 504 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2022-10-17 11:05:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-10-17 11:05:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-10-17 11:05:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 125 states have internal predecessors, (148), 23 states have call successors, (23), 13 states have call predecessors, (23), 14 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) [2022-10-17 11:05:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 197 transitions. [2022-10-17 11:05:01,634 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 197 transitions. Word has length 91 [2022-10-17 11:05:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:01,635 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 197 transitions. [2022-10-17 11:05:01,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:05:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 197 transitions. [2022-10-17 11:05:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 11:05:01,636 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:01,637 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:01,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 11:05:01,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 11:05:01,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:05:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:01,859 INFO L85 PathProgramCache]: Analyzing trace with hash 971411928, now seen corresponding path program 2 times [2022-10-17 11:05:01,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:05:01,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698668844] [2022-10-17 11:05:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:01,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:05:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:02,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:05:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:02,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:05:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:02,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:05:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:02,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:05:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:02,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:05:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:02,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-17 11:05:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:02,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 11:05:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:02,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-10-17 11:05:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-10-17 11:05:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-10-17 11:05:03,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:05:03,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698668844] [2022-10-17 11:05:03,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698668844] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:05:03,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:05:03,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 11:05:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959650338] [2022-10-17 11:05:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:05:03,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:05:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:05:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:05:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:05:03,147 INFO L87 Difference]: Start difference. First operand 160 states and 197 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, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:05:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:05:03,714 INFO L93 Difference]: Finished difference Result 259 states and 316 transitions. [2022-10-17 11:05:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:05:03,715 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, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-10-17 11:05:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:05:03,717 INFO L225 Difference]: With dead ends: 259 [2022-10-17 11:05:03,717 INFO L226 Difference]: Without dead ends: 187 [2022-10-17 11:05:03,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-10-17 11:05:03,718 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 136 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 11:05:03,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 272 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 11:05:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-10-17 11:05:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2022-10-17 11:05:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 134 states have internal predecessors, (157), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-10-17 11:05:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 209 transitions. [2022-10-17 11:05:03,731 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 209 transitions. Word has length 91 [2022-10-17 11:05:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:05:03,732 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 209 transitions. [2022-10-17 11:05:03,732 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, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 11:05:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 209 transitions. [2022-10-17 11:05:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 11:05:03,733 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:05:03,734 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:05:03,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 11:05:03,734 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:05:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:05:03,735 INFO L85 PathProgramCache]: Analyzing trace with hash -875101412, now seen corresponding path program 1 times [2022-10-17 11:05:03,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:05:03,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784561273] [2022-10-17 11:05:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:03,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:05:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:05:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 11:05:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 11:05:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-10-17 11:05:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-10-17 11:05:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-10-17 11:05:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 11:05:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-10-17 11:05:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-10-17 11:05:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:05:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-10-17 11:05:04,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:05:04,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784561273] [2022-10-17 11:05:04,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784561273] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:05:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18044692] [2022-10-17 11:05:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:05:04,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:05:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:05:04,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:05:04,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83458da5-b246-4311-a0e2-aadab9ac3948/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process