./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/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_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN --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-6b4ec56 [2022-11-20 11:05:12,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:05:12,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:05:12,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:05:12,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:05:12,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:05:12,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:05:12,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:05:12,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:05:12,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:05:12,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:05:12,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:05:12,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:05:12,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:05:12,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:05:12,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:05:12,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:05:12,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:05:12,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:05:12,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:05:12,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:05:12,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:05:12,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:05:12,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:05:12,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:05:12,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:05:12,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:05:12,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:05:12,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:05:12,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:05:12,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:05:12,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:05:12,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:05:12,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:05:12,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:05:12,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:05:12,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:05:12,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:05:12,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:05:12,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:05:12,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:05:12,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-20 11:05:12,220 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:05:12,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:05:12,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:05:12,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:05:12,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:05:12,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:05:12,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:05:12,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:05:12,223 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:05:12,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:05:12,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:05:12,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:05:12,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:05:12,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:05:12,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:05:12,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:05:12,225 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:05:12,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:05:12,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:05:12,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:05:12,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:05:12,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:05:12,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:05:12,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:05:12,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:05:12,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:05:12,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:05:12,227 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:05:12,227 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:05:12,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:05:12,228 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_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 [2022-11-20 11:05:12,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:05:12,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:05:12,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:05:12,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:05:12,552 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:05:12,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2022-11-20 11:05:15,623 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:05:16,190 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:05:16,190 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2022-11-20 11:05:16,230 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/data/fa1773875/281de807c47e4230a20f0fcb06c9df8f/FLAG0f34c0dde [2022-11-20 11:05:16,249 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/data/fa1773875/281de807c47e4230a20f0fcb06c9df8f [2022-11-20 11:05:16,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:05:16,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:05:16,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:05:16,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:05:16,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:05:16,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:05:16" (1/1) ... [2022-11-20 11:05:16,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14129122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:16, skipping insertion in model container [2022-11-20 11:05:16,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:05:16" (1/1) ... [2022-11-20 11:05:16,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:05:16,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:05:16,713 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2022-11-20 11:05:16,721 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2022-11-20 11:05:17,723 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:17,724 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:17,725 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:17,726 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:17,728 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:17,742 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:17,743 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:17,745 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:17,746 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,253 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 11:05:18,254 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 11:05:18,256 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 11:05:18,257 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 11:05:18,259 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 11:05:18,260 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 11:05:18,261 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 11:05:18,262 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 11:05:18,262 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 11:05:18,263 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 11:05:18,518 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 11:05:18,667 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,667 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:05:18,780 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:05:18,793 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2022-11-20 11:05:18,794 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2022-11-20 11:05:18,854 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,855 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,856 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,857 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,858 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,867 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,867 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,873 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,874 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:18,931 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 11:05:18,932 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 11:05:18,933 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 11:05:18,934 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 11:05:18,935 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 11:05:18,936 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 11:05:18,937 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 11:05:18,937 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 11:05:18,938 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 11:05:18,938 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 11:05:18,965 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 11:05:19,118 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:19,119 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:05:19,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:05:19,392 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:05:19,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19 WrapperNode [2022-11-20 11:05:19,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:05:19,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:05:19,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:05:19,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:05:19,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,564 INFO L138 Inliner]: procedures = 691, calls = 2613, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 795 [2022-11-20 11:05:19,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:05:19,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:05:19,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:05:19,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:05:19,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,690 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:05:19,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:05:19,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:05:19,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:05:19,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (1/1) ... [2022-11-20 11:05:19,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:05:19,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:19,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:05:19,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:05:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-20 11:05:19,870 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-20 11:05:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:05:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-20 11:05:19,870 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-20 11:05:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:05:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 11:05:19,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 11:05:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2022-11-20 11:05:19,872 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2022-11-20 11:05:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:05:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:05:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:05:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:05:19,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:05:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-20 11:05:19,874 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-20 11:05:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 11:05:19,874 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 11:05:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:05:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:05:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 11:05:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-20 11:05:19,876 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-20 11:05:19,876 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-20 11:05:19,876 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-20 11:05:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:05:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-11-20 11:05:19,877 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-11-20 11:05:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-11-20 11:05:19,878 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-11-20 11:05:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:05:20,278 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:05:20,282 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:05:21,561 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:05:21,570 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:05:21,571 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:05:21,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:05:21 BoogieIcfgContainer [2022-11-20 11:05:21,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:05:21,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:05:21,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:05:21,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:05:21,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:05:16" (1/3) ... [2022-11-20 11:05:21,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b795736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:05:21, skipping insertion in model container [2022-11-20 11:05:21,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:19" (2/3) ... [2022-11-20 11:05:21,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b795736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:05:21, skipping insertion in model container [2022-11-20 11:05:21,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:05:21" (3/3) ... [2022-11-20 11:05:21,587 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_secure_zero_harness.i [2022-11-20 11:05:21,607 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:05:21,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:05:21,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:05:21,695 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;@558ef75f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:05:21,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:05:21,699 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) [2022-11-20 11:05:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 11:05:21,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:21,714 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] [2022-11-20 11:05:21,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:21,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:21,723 INFO L85 PathProgramCache]: Analyzing trace with hash -70528239, now seen corresponding path program 1 times [2022-11-20 11:05:21,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:21,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583796914] [2022-11-20 11:05:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:21,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:05:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:05:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:05:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-20 11:05:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 11:05:22,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583796914] [2022-11-20 11:05:22,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583796914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:22,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:22,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:22,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014821281] [2022-11-20 11:05:22,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:22,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:22,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:22,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:22,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:22,718 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) [2022-11-20 11:05:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:23,150 INFO L93 Difference]: Finished difference Result 202 states and 265 transitions. [2022-11-20 11:05:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:23,161 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 [2022-11-20 11:05:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:23,178 INFO L225 Difference]: With dead ends: 202 [2022-11-20 11:05:23,178 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 11:05:23,184 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 [2022-11-20 11:05:23,195 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:23,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 74 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:05:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 11:05:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-20 11:05:23,245 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) [2022-11-20 11:05:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2022-11-20 11:05:23,249 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 65 [2022-11-20 11:05:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:23,249 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2022-11-20 11:05:23,250 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) [2022-11-20 11:05:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2022-11-20 11:05:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 11:05:23,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:23,253 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] [2022-11-20 11:05:23,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:05:23,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1061132297, now seen corresponding path program 1 times [2022-11-20 11:05:23,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:23,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228813259] [2022-11-20 11:05:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:23,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:23,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:05:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-20 11:05:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:05:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-20 11:05:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 11:05:24,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:24,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228813259] [2022-11-20 11:05:24,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228813259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:24,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819989469] [2022-11-20 11:05:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:24,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:24,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:24,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:24,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:05:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2465 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:05:24,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:05:25,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:25,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819989469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:25,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:25,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-20 11:05:25,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538767573] [2022-11-20 11:05:25,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:25,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:05:25,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:25,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:05:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:05:25,092 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) [2022-11-20 11:05:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:25,306 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2022-11-20 11:05:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:25,307 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 [2022-11-20 11:05:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:25,313 INFO L225 Difference]: With dead ends: 174 [2022-11-20 11:05:25,314 INFO L226 Difference]: Without dead ends: 101 [2022-11-20 11:05:25,319 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 [2022-11-20 11:05:25,321 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 [2022-11-20 11:05:25,322 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] [2022-11-20 11:05:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-20 11:05:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-11-20 11:05:25,354 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) [2022-11-20 11:05:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2022-11-20 11:05:25,360 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 65 [2022-11-20 11:05:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:25,361 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2022-11-20 11:05:25,361 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) [2022-11-20 11:05:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2022-11-20 11:05:25,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:05:25,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:25,367 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] [2022-11-20 11:05:25,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:25,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:25,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:25,580 INFO L85 PathProgramCache]: Analyzing trace with hash -883820620, now seen corresponding path program 1 times [2022-11-20 11:05:25,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:25,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317135211] [2022-11-20 11:05:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:25,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:05:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:05:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:05:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-20 11:05:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:05:26,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:26,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317135211] [2022-11-20 11:05:26,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317135211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:26,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500004982] [2022-11-20 11:05:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:26,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:26,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:26,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:26,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:05:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:05:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:05:27,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:27,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500004982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:27,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:27,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2022-11-20 11:05:27,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618541779] [2022-11-20 11:05:27,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:27,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:05:27,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:05:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:05:27,488 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) [2022-11-20 11:05:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:27,783 INFO L93 Difference]: Finished difference Result 172 states and 211 transitions. [2022-11-20 11:05:27,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:05:27,784 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 [2022-11-20 11:05:27,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:27,787 INFO L225 Difference]: With dead ends: 172 [2022-11-20 11:05:27,787 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 11:05:27,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:05:27,792 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 150 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:27,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 482 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:05:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 11:05:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-20 11:05:27,816 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) [2022-11-20 11:05:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2022-11-20 11:05:27,818 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 71 [2022-11-20 11:05:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:27,821 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2022-11-20 11:05:27,822 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) [2022-11-20 11:05:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2022-11-20 11:05:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 11:05:27,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:27,830 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] [2022-11-20 11:05:27,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:28,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:28,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:28,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash 81192906, now seen corresponding path program 1 times [2022-11-20 11:05:28,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:28,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900644377] [2022-11-20 11:05:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:28,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:28,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:28,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:29,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:29,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:29,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:29,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:05:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:29,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:05:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:29,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-20 11:05:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:29,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 11:05:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-20 11:05:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900644377] [2022-11-20 11:05:29,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900644377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:29,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:29,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:05:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556712592] [2022-11-20 11:05:29,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:29,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:05:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:29,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:05:29,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:05:29,219 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) [2022-11-20 11:05:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:29,815 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2022-11-20 11:05:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:05:29,816 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 [2022-11-20 11:05:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:29,817 INFO L225 Difference]: With dead ends: 110 [2022-11-20 11:05:29,817 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 11:05:29,817 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 [2022-11-20 11:05:29,818 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 94 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:29,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 279 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:05:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 11:05:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-11-20 11:05:29,837 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) [2022-11-20 11:05:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2022-11-20 11:05:29,838 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 83 [2022-11-20 11:05:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:29,843 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2022-11-20 11:05:29,843 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) [2022-11-20 11:05:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2022-11-20 11:05:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 11:05:29,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:29,846 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] [2022-11-20 11:05:29,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:05:29,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1920648402, now seen corresponding path program 1 times [2022-11-20 11:05:29,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:29,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615101012] [2022-11-20 11:05:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:29,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:05:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:05:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-20 11:05:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 11:05:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:05:31,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:31,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615101012] [2022-11-20 11:05:31,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615101012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:31,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:31,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:05:31,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919550468] [2022-11-20 11:05:31,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:31,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:05:31,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:05:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:05:31,628 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 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) [2022-11-20 11:05:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:32,334 INFO L93 Difference]: Finished difference Result 170 states and 208 transitions. [2022-11-20 11:05:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:05:32,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 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 [2022-11-20 11:05:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:32,337 INFO L225 Difference]: With dead ends: 170 [2022-11-20 11:05:32,337 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 11:05:32,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:05:32,338 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 121 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:32,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 208 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:05:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 11:05:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2022-11-20 11:05:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 81 states have internal predecessors, (91), 22 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2022-11-20 11:05:32,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 141 transitions. [2022-11-20 11:05:32,351 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 141 transitions. Word has length 87 [2022-11-20 11:05:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:32,352 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 141 transitions. [2022-11-20 11:05:32,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 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) [2022-11-20 11:05:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 141 transitions. [2022-11-20 11:05:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 11:05:32,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:32,354 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] [2022-11-20 11:05:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:05:32,354 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:32,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2116153456, now seen corresponding path program 1 times [2022-11-20 11:05:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:32,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496139624] [2022-11-20 11:05:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:32,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:05:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:05:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-20 11:05:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 11:05:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:05:34,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496139624] [2022-11-20 11:05:34,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496139624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010686960] [2022-11-20 11:05:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:34,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:34,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:34,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:05:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 2523 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:05:35,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:35,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:05:35,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:05:35,880 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-20 11:05:35,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-11-20 11:05:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 11:05:35,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:35,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010686960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:35,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:35,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2022-11-20 11:05:35,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864133992] [2022-11-20 11:05:35,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:35,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:05:35,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:05:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:05:35,887 INFO L87 Difference]: Start difference. First operand 114 states and 141 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) [2022-11-20 11:05:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:36,046 INFO L93 Difference]: Finished difference Result 220 states and 271 transitions. [2022-11-20 11:05:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:05:36,047 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 [2022-11-20 11:05:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:36,048 INFO L225 Difference]: With dead ends: 220 [2022-11-20 11:05:36,049 INFO L226 Difference]: Without dead ends: 127 [2022-11-20 11:05:36,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:05:36,052 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 22 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:36,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 910 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-20 11:05:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-20 11:05:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-20 11:05:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 93 states have internal predecessors, (106), 22 states have call successors, (22), 12 states have call predecessors, (22), 14 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2022-11-20 11:05:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2022-11-20 11:05:36,076 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 87 [2022-11-20 11:05:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:36,076 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2022-11-20 11:05:36,076 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) [2022-11-20 11:05:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2022-11-20 11:05:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 11:05:36,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:36,078 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] [2022-11-20 11:05:36,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:36,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:05:36,290 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:36,290 INFO L85 PathProgramCache]: Analyzing trace with hash -729368046, now seen corresponding path program 1 times [2022-11-20 11:05:36,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:36,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519849549] [2022-11-20 11:05:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:36,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:05:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:05:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-20 11:05:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 11:05:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 11:05:36,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:36,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519849549] [2022-11-20 11:05:36,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519849549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:36,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717802862] [2022-11-20 11:05:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:36,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:36,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:36,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:36,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:05:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:05:37,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:05:37,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:37,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717802862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:37,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:37,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-20 11:05:37,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473113263] [2022-11-20 11:05:37,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:37,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:05:37,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:37,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:05:37,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:37,265 INFO L87 Difference]: Start difference. First operand 127 states and 156 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) [2022-11-20 11:05:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:37,299 INFO L93 Difference]: Finished difference Result 231 states and 290 transitions. [2022-11-20 11:05:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:05:37,300 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 [2022-11-20 11:05:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:37,301 INFO L225 Difference]: With dead ends: 231 [2022-11-20 11:05:37,302 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 11:05:37,302 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 [2022-11-20 11:05:37,303 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 [2022-11-20 11:05:37,304 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] [2022-11-20 11:05:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 11:05:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2022-11-20 11:05:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 87 states have internal predecessors, (100), 22 states have call successors, (22), 12 states have call predecessors, (22), 13 states have return successors, (27), 21 states have call predecessors, (27), 21 states have call successors, (27) [2022-11-20 11:05:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2022-11-20 11:05:37,315 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 87 [2022-11-20 11:05:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:37,315 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2022-11-20 11:05:37,316 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) [2022-11-20 11:05:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2022-11-20 11:05:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 11:05:37,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:37,317 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:05:37,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:37,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 11:05:37,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:37,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2084366440, now seen corresponding path program 1 times [2022-11-20 11:05:37,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:37,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295250929] [2022-11-20 11:05:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:37,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:05:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-20 11:05:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:05:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:05:38,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:38,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295250929] [2022-11-20 11:05:38,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295250929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:38,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853944622] [2022-11-20 11:05:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:38,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:38,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:38,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:38,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:05:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:05:39,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:05:39,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:39,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853944622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:39,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:39,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-20 11:05:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139055392] [2022-11-20 11:05:39,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:39,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:39,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:05:39,496 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (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) [2022-11-20 11:05:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:39,687 INFO L93 Difference]: Finished difference Result 234 states and 302 transitions. [2022-11-20 11:05:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:05:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (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 91 [2022-11-20 11:05:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:39,689 INFO L225 Difference]: With dead ends: 234 [2022-11-20 11:05:39,690 INFO L226 Difference]: Without dead ends: 143 [2022-11-20 11:05:39,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:05:39,691 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 42 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:39,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 410 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 11:05:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-20 11:05:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 130. [2022-11-20 11:05:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 96 states have internal predecessors, (112), 22 states have call successors, (22), 12 states have call predecessors, (22), 13 states have return successors, (27), 21 states have call predecessors, (27), 21 states have call successors, (27) [2022-11-20 11:05:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2022-11-20 11:05:39,707 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 91 [2022-11-20 11:05:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:39,708 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2022-11-20 11:05:39,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (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) [2022-11-20 11:05:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2022-11-20 11:05:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 11:05:39,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:39,710 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] [2022-11-20 11:05:39,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:39,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:39,920 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:39,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2043691690, now seen corresponding path program 2 times [2022-11-20 11:05:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:39,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022779629] [2022-11-20 11:05:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:39,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:40,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:40,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:40,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:40,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:40,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:40,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:05:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:41,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-20 11:05:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:41,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:05:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:05:41,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:41,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022779629] [2022-11-20 11:05:41,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022779629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:41,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114295630] [2022-11-20 11:05:41,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:41,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:41,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:41,063 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:41,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:05:41,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:05:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:41,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 2330 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:05:41,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:41,677 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:05:41,684 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:05:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:05:42,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:42,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114295630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:42,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:42,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-11-20 11:05:42,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214586935] [2022-11-20 11:05:42,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:42,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:05:42,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:42,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:05:42,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:05:42,316 INFO L87 Difference]: Start difference. First operand 130 states and 161 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) [2022-11-20 11:05:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:42,417 INFO L93 Difference]: Finished difference Result 232 states and 285 transitions. [2022-11-20 11:05:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:05:42,418 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 [2022-11-20 11:05:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:42,420 INFO L225 Difference]: With dead ends: 232 [2022-11-20 11:05:42,421 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 11:05:42,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:05:42,422 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 23 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:42,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 413 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 11:05:42,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 11:05:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2022-11-20 11:05:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-20 11:05:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-11-20 11:05:42,435 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 91 [2022-11-20 11:05:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:42,436 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-11-20 11:05:42,436 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) [2022-11-20 11:05:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-11-20 11:05:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 11:05:42,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:42,438 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] [2022-11-20 11:05:42,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:42,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:42,648 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash 971411928, now seen corresponding path program 2 times [2022-11-20 11:05:42,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:42,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446837328] [2022-11-20 11:05:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:42,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:05:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-20 11:05:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:05:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:05:43,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:43,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446837328] [2022-11-20 11:05:43,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446837328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:43,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:43,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:05:43,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005303746] [2022-11-20 11:05:43,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:43,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:05:43,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:43,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:05:43,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:05:43,992 INFO L87 Difference]: Start difference. First operand 148 states and 187 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) [2022-11-20 11:05:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:44,643 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2022-11-20 11:05:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:05:44,644 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 [2022-11-20 11:05:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:44,645 INFO L225 Difference]: With dead ends: 239 [2022-11-20 11:05:44,645 INFO L226 Difference]: Without dead ends: 172 [2022-11-20 11:05:44,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:05:44,646 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 148 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:44,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 208 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:05:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-20 11:05:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 155. [2022-11-20 11:05:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 120 states have internal predecessors, (144), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-20 11:05:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 196 transitions. [2022-11-20 11:05:44,658 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 196 transitions. Word has length 91 [2022-11-20 11:05:44,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:44,658 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 196 transitions. [2022-11-20 11:05:44,659 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) [2022-11-20 11:05:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 196 transitions. [2022-11-20 11:05:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 11:05:44,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:44,660 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:05:44,661 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash -616935974, now seen corresponding path program 1 times [2022-11-20 11:05:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:44,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278943969] [2022-11-20 11:05:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:44,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:05:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-20 11:05:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:05:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:05:45,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:45,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278943969] [2022-11-20 11:05:45,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278943969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:45,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648864108] [2022-11-20 11:05:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:45,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:45,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:45,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:45,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:05:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:46,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:05:46,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 11:05:46,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:46,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648864108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:46,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:46,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-20 11:05:46,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375342735] [2022-11-20 11:05:46,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:46,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:05:46,543 INFO L87 Difference]: Start difference. First operand 155 states and 196 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 11:05:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:46,762 INFO L93 Difference]: Finished difference Result 295 states and 385 transitions. [2022-11-20 11:05:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:46,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (11), 2 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 91 [2022-11-20 11:05:46,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:46,764 INFO L225 Difference]: With dead ends: 295 [2022-11-20 11:05:46,764 INFO L226 Difference]: Without dead ends: 174 [2022-11-20 11:05:46,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:05:46,766 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 30 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:46,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 439 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:05:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-20 11:05:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2022-11-20 11:05:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 120 states have internal predecessors, (142), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-20 11:05:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 194 transitions. [2022-11-20 11:05:46,777 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 194 transitions. Word has length 91 [2022-11-20 11:05:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:46,778 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 194 transitions. [2022-11-20 11:05:46,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 11:05:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 194 transitions. [2022-11-20 11:05:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-20 11:05:46,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:46,780 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:05:46,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 11:05:46,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:05:46,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:46,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:46,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1279071811, now seen corresponding path program 1 times [2022-11-20 11:05:46,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:46,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075797112] [2022-11-20 11:05:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:46,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:05:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-20 11:05:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:05:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-20 11:05:47,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:47,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075797112] [2022-11-20 11:05:47,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075797112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:47,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:47,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:05:47,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765714224] [2022-11-20 11:05:47,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:47,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:47,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:47,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:47,446 INFO L87 Difference]: Start difference. First operand 155 states and 194 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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) [2022-11-20 11:05:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:47,822 INFO L93 Difference]: Finished difference Result 282 states and 360 transitions. [2022-11-20 11:05:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 93 [2022-11-20 11:05:47,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:47,825 INFO L225 Difference]: With dead ends: 282 [2022-11-20 11:05:47,825 INFO L226 Difference]: Without dead ends: 158 [2022-11-20 11:05:47,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:05:47,827 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 81 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:47,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 138 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:05:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-20 11:05:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-11-20 11:05:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 115 states have (on average 1.173913043478261) internal successors, (135), 117 states have internal predecessors, (135), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-20 11:05:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 187 transitions. [2022-11-20 11:05:47,840 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 187 transitions. Word has length 93 [2022-11-20 11:05:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:47,841 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 187 transitions. [2022-11-20 11:05:47,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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) [2022-11-20 11:05:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 187 transitions. [2022-11-20 11:05:47,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-20 11:05:47,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:47,844 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:47,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:05:47,845 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1956898303, now seen corresponding path program 1 times [2022-11-20 11:05:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:47,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982800426] [2022-11-20 11:05:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:47,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:05:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-20 11:05:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:05:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:05:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:48,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982800426] [2022-11-20 11:05:48,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982800426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:48,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:48,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:05:48,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345996052] [2022-11-20 11:05:48,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:48,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:48,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:48,253 INFO L87 Difference]: Start difference. First operand 152 states and 187 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2022-11-20 11:05:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:48,622 INFO L93 Difference]: Finished difference Result 268 states and 341 transitions. [2022-11-20 11:05:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:48,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 93 [2022-11-20 11:05:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:48,624 INFO L225 Difference]: With dead ends: 268 [2022-11-20 11:05:48,625 INFO L226 Difference]: Without dead ends: 150 [2022-11-20 11:05:48,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:05:48,626 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 89 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:48,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 138 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:05:48,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-20 11:05:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2022-11-20 11:05:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 103 states have (on average 1.145631067961165) internal successors, (118), 105 states have internal predecessors, (118), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-20 11:05:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 170 transitions. [2022-11-20 11:05:48,642 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 170 transitions. Word has length 93 [2022-11-20 11:05:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:48,643 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 170 transitions. [2022-11-20 11:05:48,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2022-11-20 11:05:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 170 transitions. [2022-11-20 11:05:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-20 11:05:48,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:48,645 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:48,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:05:48,646 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash 48656513, now seen corresponding path program 1 times [2022-11-20 11:05:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:48,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619186973] [2022-11-20 11:05:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:48,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:05:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-20 11:05:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:05:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 11:05:49,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:49,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619186973] [2022-11-20 11:05:49,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619186973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:49,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:49,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:05:49,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037046433] [2022-11-20 11:05:49,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:49,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:05:49,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:49,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:05:49,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:05:49,841 INFO L87 Difference]: Start difference. First operand 140 states and 170 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 8 states have internal predecessors, (49), 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) [2022-11-20 11:05:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:50,635 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2022-11-20 11:05:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:05:50,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 8 states have internal predecessors, (49), 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 93 [2022-11-20 11:05:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:50,637 INFO L225 Difference]: With dead ends: 154 [2022-11-20 11:05:50,637 INFO L226 Difference]: Without dead ends: 152 [2022-11-20 11:05:50,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:05:50,639 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 101 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:50,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 352 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:05:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-20 11:05:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2022-11-20 11:05:50,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 111 states have internal predecessors, (123), 23 states have call successors, (23), 13 states have call predecessors, (23), 14 states have return successors, (34), 21 states have call predecessors, (34), 22 states have call successors, (34) [2022-11-20 11:05:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2022-11-20 11:05:50,650 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 93 [2022-11-20 11:05:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:50,651 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2022-11-20 11:05:50,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 8 states have internal predecessors, (49), 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) [2022-11-20 11:05:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2022-11-20 11:05:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-20 11:05:50,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:50,653 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:50,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:05:50,654 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:50,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:50,654 INFO L85 PathProgramCache]: Analyzing trace with hash 749721091, now seen corresponding path program 1 times [2022-11-20 11:05:50,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:50,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510576903] [2022-11-20 11:05:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:50,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:05:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-20 11:05:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:05:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:05:51,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:51,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510576903] [2022-11-20 11:05:51,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510576903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:51,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736927164] [2022-11-20 11:05:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:51,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:51,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:51,736 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:51,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:05:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:52,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:05:52,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:05:52,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:52,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736927164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:52,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:52,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2022-11-20 11:05:52,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075973498] [2022-11-20 11:05:52,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:52,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:05:52,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:52,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:05:52,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:05:52,383 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand has 9 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 11:05:52,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:52,534 INFO L93 Difference]: Finished difference Result 265 states and 328 transitions. [2022-11-20 11:05:52,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:05:52,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2022-11-20 11:05:52,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:52,537 INFO L225 Difference]: With dead ends: 265 [2022-11-20 11:05:52,537 INFO L226 Difference]: Without dead ends: 147 [2022-11-20 11:05:52,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:05:52,540 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 13 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:52,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 853 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-20 11:05:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-20 11:05:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 112 states have internal predecessors, (121), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (36), 21 states have call predecessors, (36), 22 states have call successors, (36) [2022-11-20 11:05:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2022-11-20 11:05:52,558 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 93 [2022-11-20 11:05:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:52,558 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2022-11-20 11:05:52,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 11:05:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2022-11-20 11:05:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-20 11:05:52,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:52,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:52,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:52,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:05:52,771 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:52,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1435273966, now seen corresponding path program 1 times [2022-11-20 11:05:52,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:52,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314506590] [2022-11-20 11:05:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:52,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:53,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:53,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:53,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:53,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:53,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:53,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:05:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:53,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:05:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:53,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 11:05:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:53,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-20 11:05:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:05:54,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:54,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314506590] [2022-11-20 11:05:54,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314506590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:54,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:54,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:05:54,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856898136] [2022-11-20 11:05:54,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:54,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:05:54,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:54,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:05:54,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:05:54,137 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2022-11-20 11:05:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:54,854 INFO L93 Difference]: Finished difference Result 226 states and 267 transitions. [2022-11-20 11:05:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:05:54,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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 95 [2022-11-20 11:05:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:54,857 INFO L225 Difference]: With dead ends: 226 [2022-11-20 11:05:54,857 INFO L226 Difference]: Without dead ends: 147 [2022-11-20 11:05:54,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:05:54,858 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 91 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:54,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 208 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:05:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-20 11:05:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-20 11:05:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 112 states have internal predecessors, (121), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (34), 21 states have call predecessors, (34), 22 states have call successors, (34) [2022-11-20 11:05:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2022-11-20 11:05:54,871 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 95 [2022-11-20 11:05:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:54,871 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2022-11-20 11:05:54,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2022-11-20 11:05:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2022-11-20 11:05:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 11:05:54,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:54,874 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:54,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:05:54,875 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1313835716, now seen corresponding path program 1 times [2022-11-20 11:05:54,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:54,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843511579] [2022-11-20 11:05:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:54,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:05:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:05:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 11:05:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:05:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 11:05:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 11:05:55,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:55,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843511579] [2022-11-20 11:05:55,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843511579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:55,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:55,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:05:55,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277698458] [2022-11-20 11:05:55,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:55,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:05:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:05:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:05:55,846 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-20 11:05:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:56,698 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2022-11-20 11:05:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:05:56,699 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2022-11-20 11:05:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:56,701 INFO L225 Difference]: With dead ends: 165 [2022-11-20 11:05:56,701 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 11:05:56,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:05:56,702 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 145 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:56,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 255 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:05:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 11:05:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 152. [2022-11-20 11:05:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 111 states have (on average 1.117117117117117) internal successors, (124), 115 states have internal predecessors, (124), 24 states have call successors, (24), 14 states have call predecessors, (24), 16 states have return successors, (35), 22 states have call predecessors, (35), 23 states have call successors, (35) [2022-11-20 11:05:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 183 transitions. [2022-11-20 11:05:56,715 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 183 transitions. Word has length 109 [2022-11-20 11:05:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:56,716 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 183 transitions. [2022-11-20 11:05:56,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-20 11:05:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 183 transitions. [2022-11-20 11:05:56,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 11:05:56,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:56,718 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:56,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:05:56,719 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:56,720 INFO L85 PathProgramCache]: Analyzing trace with hash 920679761, now seen corresponding path program 1 times [2022-11-20 11:05:56,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:56,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962332949] [2022-11-20 11:05:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:56,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:05:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:05:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:05:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:05:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:05:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 11:05:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-20 11:05:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:05:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-20 11:05:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 11:05:58,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:58,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962332949] [2022-11-20 11:05:58,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962332949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:58,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224682194] [2022-11-20 11:05:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:58,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:58,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:58,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:58,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:05:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:59,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2625 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:05:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:59,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:05:59,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:05:59,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 11:05:59,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 11:05:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:05:59,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:59,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224682194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:59,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:05:59,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2022-11-20 11:05:59,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964635780] [2022-11-20 11:05:59,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:59,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:05:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:05:59,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:05:59,914 INFO L87 Difference]: Start difference. First operand 152 states and 183 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 11:06:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:00,539 INFO L93 Difference]: Finished difference Result 309 states and 359 transitions. [2022-11-20 11:06:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:06:00,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 111 [2022-11-20 11:06:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:00,542 INFO L225 Difference]: With dead ends: 309 [2022-11-20 11:06:00,542 INFO L226 Difference]: Without dead ends: 186 [2022-11-20 11:06:00,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:06:00,544 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 76 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:00,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 900 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 293 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2022-11-20 11:06:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-20 11:06:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2022-11-20 11:06:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 135 states have (on average 1.1037037037037036) internal successors, (149), 139 states have internal predecessors, (149), 26 states have call successors, (26), 16 states have call predecessors, (26), 18 states have return successors, (38), 24 states have call predecessors, (38), 25 states have call successors, (38) [2022-11-20 11:06:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 213 transitions. [2022-11-20 11:06:00,557 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 213 transitions. Word has length 111 [2022-11-20 11:06:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:00,558 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 213 transitions. [2022-11-20 11:06:00,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 9 states have internal predecessors, (79), 4 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 11:06:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 213 transitions. [2022-11-20 11:06:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 11:06:00,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:00,560 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:00,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:00,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:06:00,776 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:06:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash 701527042, now seen corresponding path program 1 times [2022-11-20 11:06:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:00,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870184525] [2022-11-20 11:06:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:00,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:02,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:06:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:02,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:06:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:02,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:06:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:02,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:02,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:06:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:02,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:06:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:02,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:06:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:02,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:03,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:06:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:03,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 11:06:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:03,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:06:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:03,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-20 11:06:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 11:06:03,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:03,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870184525] [2022-11-20 11:06:03,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870184525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:03,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005375481] [2022-11-20 11:06:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:03,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:03,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:06:03,247 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:06:03,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:06:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 2578 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:06:03,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:03,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:06:04,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-20 11:06:04,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:06:04,269 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-20 11:06:04,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 1 [2022-11-20 11:06:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 11:06:04,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:04,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-11-20 11:06:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-20 11:06:04,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005375481] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:04,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:04,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16, 12] total 26 [2022-11-20 11:06:04,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515461881] [2022-11-20 11:06:04,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:04,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:04,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:04,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:04,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:06:04,666 INFO L87 Difference]: Start difference. First operand 180 states and 213 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 11:06:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:05,332 INFO L93 Difference]: Finished difference Result 268 states and 310 transitions. [2022-11-20 11:06:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:06:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 113 [2022-11-20 11:06:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:05,334 INFO L225 Difference]: With dead ends: 268 [2022-11-20 11:06:05,334 INFO L226 Difference]: Without dead ends: 147 [2022-11-20 11:06:05,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 231 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:06:05,336 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 75 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:05,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 277 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:06:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-20 11:06:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2022-11-20 11:06:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 107 states have internal predecessors, (113), 23 states have call successors, (23), 13 states have call predecessors, (23), 16 states have return successors, (32), 22 states have call predecessors, (32), 22 states have call successors, (32) [2022-11-20 11:06:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2022-11-20 11:06:05,352 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 113 [2022-11-20 11:06:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:05,352 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2022-11-20 11:06:05,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 11:06:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2022-11-20 11:06:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 11:06:05,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:05,355 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:05,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:05,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:05,565 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:06:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1216300311, now seen corresponding path program 1 times [2022-11-20 11:06:05,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:05,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221974679] [2022-11-20 11:06:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:05,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:06:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:06:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:06:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:06:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:06:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:06:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-20 11:06:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 11:06:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-20 11:06:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 11:06:06,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:06,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221974679] [2022-11-20 11:06:06,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221974679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:06,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297163719] [2022-11-20 11:06:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:06,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:06,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:06:06,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:06:06,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:06:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 11:06:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:07,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:06:07,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:06:07,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-11-20 11:06:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:06:08,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:08,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-20 11:06:08,722 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 11:06:08,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-20 11:06:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 11:06:08,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297163719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:08,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:06:08,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 13] total 31 [2022-11-20 11:06:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011704027] [2022-11-20 11:06:08,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:08,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:06:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:06:08,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:06:08,751 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 31 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2022-11-20 11:06:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:12,342 INFO L93 Difference]: Finished difference Result 327 states and 379 transitions. [2022-11-20 11:06:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 11:06:12,343 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 115 [2022-11-20 11:06:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:12,345 INFO L225 Difference]: With dead ends: 327 [2022-11-20 11:06:12,345 INFO L226 Difference]: Without dead ends: 184 [2022-11-20 11:06:12,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 228 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=408, Invalid=4284, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 11:06:12,348 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 260 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:12,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 1130 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2410 Invalid, 0 Unknown, 250 Unchecked, 1.9s Time] [2022-11-20 11:06:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-20 11:06:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2022-11-20 11:06:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 110 states have internal predecessors, (115), 23 states have call successors, (23), 14 states have call predecessors, (23), 17 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2022-11-20 11:06:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 168 transitions. [2022-11-20 11:06:12,367 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 168 transitions. Word has length 115 [2022-11-20 11:06:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:12,368 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 168 transitions. [2022-11-20 11:06:12,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 14 states have call successors, (34), 7 states have call predecessors, (34), 8 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2022-11-20 11:06:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 168 transitions. [2022-11-20 11:06:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-20 11:06:12,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:12,370 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:12,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:12,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:12,581 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:06:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash -140184041, now seen corresponding path program 1 times [2022-11-20 11:06:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:12,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275912011] [2022-11-20 11:06:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:12,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:12,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:06:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:12,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:06:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:12,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:06:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:12,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:12,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:06:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:12,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:06:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:12,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:06:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:12,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:06:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:13,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:06:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:13,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:13,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:13,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 11:06:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-20 11:06:13,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:13,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275912011] [2022-11-20 11:06:13,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275912011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:13,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:13,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:06:13,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731328650] [2022-11-20 11:06:13,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:13,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:13,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:13,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:13,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:13,089 INFO L87 Difference]: Start difference. First operand 147 states and 168 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-20 11:06:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:13,500 INFO L93 Difference]: Finished difference Result 248 states and 281 transitions. [2022-11-20 11:06:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:06:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2022-11-20 11:06:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:13,502 INFO L225 Difference]: With dead ends: 248 [2022-11-20 11:06:13,503 INFO L226 Difference]: Without dead ends: 149 [2022-11-20 11:06:13,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:06:13,504 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 105 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:13,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 105 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:06:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-20 11:06:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-11-20 11:06:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.0841121495327102) internal successors, (116), 111 states have internal predecessors, (116), 23 states have call successors, (23), 14 states have call predecessors, (23), 17 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2022-11-20 11:06:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2022-11-20 11:06:13,523 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 118 [2022-11-20 11:06:13,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:13,523 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2022-11-20 11:06:13,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-20 11:06:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2022-11-20 11:06:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-20 11:06:13,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:13,525 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:13,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 11:06:13,526 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:06:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:13,527 INFO L85 PathProgramCache]: Analyzing trace with hash 693312025, now seen corresponding path program 1 times [2022-11-20 11:06:13,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:13,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060417765] [2022-11-20 11:06:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:13,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:06:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:06:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:06:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:06:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:06:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:06:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:06:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:06:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:18,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:19,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:06:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:19,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-20 11:06:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 11:06:19,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060417765] [2022-11-20 11:06:19,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060417765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131853419] [2022-11-20 11:06:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:19,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:19,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:06:19,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:06:19,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:06:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:20,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-20 11:06:20,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:20,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:06:22,612 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_34| Int)) (<= (+ 2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_34|) 8)) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_34|)) is different from true [2022-11-20 11:06:24,836 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_35| Int)) (<= (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_35|) 8) 2) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_35|)) is different from true [2022-11-20 11:06:27,067 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_12| Int)) (<= (+ 2 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_12|) 8)) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_12|)) is different from true [2022-11-20 11:06:35,811 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_13| Int)) (and (not (= (mod (select (select |c_#memory_int| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_13|) 16) 18446744073709551616) 0)) (<= (+ 2 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_13|) 8)) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_13|))) is different from true [2022-11-20 11:06:36,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:06:36,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2022-11-20 11:06:36,377 WARN L859 $PredicateComparison]: unable to prove that (exists ((memset_impl_~sp~0.base Int)) (and (exists ((v_ArrVal_1057 (Array Int Int))) (= (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1057) |c_#memory_int|)) (<= memset_impl_~sp~0.base |c_memset_impl_#in~s.base|))) is different from true [2022-11-20 11:06:36,418 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1057 (Array Int Int)) (memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_my_memset_#in~s.base|) (= (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1057) |c_#memory_int|))) is different from true [2022-11-20 11:06:36,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:06:36,450 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2022-11-20 11:06:36,503 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 26 [2022-11-20 11:06:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 12 refuted. 10 times theorem prover too weak. 12 trivial. 38 not checked. [2022-11-20 11:06:43,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:46,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131853419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:46,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:46,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 50 [2022-11-20 11:06:46,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410883205] [2022-11-20 11:06:46,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:06:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:06:46,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2199, Unknown=16, NotChecked=594, Total=2970 [2022-11-20 11:06:46,282 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 50 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 41 states have internal predecessors, (142), 18 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) [2022-11-20 11:07:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:59,934 INFO L93 Difference]: Finished difference Result 301 states and 343 transitions. [2022-11-20 11:07:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 11:07:59,935 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 41 states have internal predecessors, (142), 18 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) Word has length 120 [2022-11-20 11:07:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:59,937 INFO L225 Difference]: With dead ends: 301 [2022-11-20 11:07:59,937 INFO L226 Difference]: Without dead ends: 195 [2022-11-20 11:07:59,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 96.9s TimeCoverageRelationStatistics Valid=396, Invalid=5583, Unknown=51, NotChecked=942, Total=6972 [2022-11-20 11:07:59,940 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 215 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 4265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2015 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:59,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 933 Invalid, 4265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2128 Invalid, 0 Unknown, 2015 Unchecked, 2.1s Time] [2022-11-20 11:07:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-20 11:07:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 186. [2022-11-20 11:07:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 142 states have internal predecessors, (148), 27 states have call successors, (27), 17 states have call predecessors, (27), 21 states have return successors, (37), 26 states have call predecessors, (37), 26 states have call successors, (37) [2022-11-20 11:07:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2022-11-20 11:07:59,964 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 120 [2022-11-20 11:07:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:59,964 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2022-11-20 11:07:59,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 3.1555555555555554) internal successors, (142), 41 states have internal predecessors, (142), 18 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) [2022-11-20 11:07:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2022-11-20 11:07:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-20 11:07:59,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:59,967 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:59,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:08:00,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:08:00,177 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:08:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1475852901, now seen corresponding path program 2 times [2022-11-20 11:08:00,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:00,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679717578] [2022-11-20 11:08:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:08:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:08:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:08:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:08:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:08:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:08:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:05,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:08:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:05,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:08:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:05,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:08:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:06,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:08:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:06,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-20 11:08:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 11:08:06,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:06,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679717578] [2022-11-20 11:08:06,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679717578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:08:06,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551944264] [2022-11-20 11:08:06,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:08:06,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:08:06,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:08:06,611 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:08:06,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:08:07,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:08:07,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:08:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2679 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-20 11:08:07,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:07,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:08:08,157 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:08:08,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:08:08,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:08:10,194 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_40| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_40| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_40|) ~aws_common_error~0~AWS_ERROR_INVALID_BASE64_STR)))) is different from true [2022-11-20 11:08:12,278 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_41| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_41| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_41|) ~aws_common_error~0~AWS_ERROR_INVALID_BASE64_STR)))) is different from true [2022-11-20 11:08:14,347 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_17| Int)) (not (= |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_17| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_17|) 8)))) is different from true [2022-11-20 11:08:45,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-20 11:08:52,567 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1192 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_memset_impl_#in~s.base| v_ArrVal_1192))) is different from true [2022-11-20 11:08:52,583 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1192 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_my_memset_#in~s.base| v_ArrVal_1192))) is different from true [2022-11-20 11:08:52,598 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2022-11-20 11:08:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:52,637 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 28 [2022-11-20 11:09:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 29 refuted. 6 times theorem prover too weak. 4 trivial. 44 not checked. [2022-11-20 11:09:07,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:08,117 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1201 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_ArrVal_1201) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616) 0))) is different from false [2022-11-20 11:09:08,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551944264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:08,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:08,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 53 [2022-11-20 11:09:08,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492490648] [2022-11-20 11:09:08,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:08,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:09:08,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:09:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2366, Unknown=31, NotChecked=618, Total=3192 [2022-11-20 11:09:08,124 INFO L87 Difference]: Start difference. First operand 186 states and 212 transitions. Second operand has 53 states, 49 states have (on average 3.020408163265306) internal successors, (148), 45 states have internal predecessors, (148), 15 states have call successors, (25), 13 states have call predecessors, (25), 14 states have return successors, (23), 15 states have call predecessors, (23), 14 states have call successors, (23) [2022-11-20 11:11:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:02,304 INFO L93 Difference]: Finished difference Result 371 states and 414 transitions. [2022-11-20 11:11:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 11:11:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 3.020408163265306) internal successors, (148), 45 states have internal predecessors, (148), 15 states have call successors, (25), 13 states have call predecessors, (25), 14 states have return successors, (23), 15 states have call predecessors, (23), 14 states have call successors, (23) Word has length 122 [2022-11-20 11:11:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:02,307 INFO L225 Difference]: With dead ends: 371 [2022-11-20 11:11:02,307 INFO L226 Difference]: Without dead ends: 251 [2022-11-20 11:11:02,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 135 SyntacticMatches, 15 SemanticMatches, 92 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 173.1s TimeCoverageRelationStatistics Valid=465, Invalid=7122, Unknown=93, NotChecked=1062, Total=8742 [2022-11-20 11:11:02,310 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 171 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1367 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:02,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1139 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1616 Invalid, 0 Unknown, 1367 Unchecked, 1.4s Time] [2022-11-20 11:11:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-20 11:11:02,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2022-11-20 11:11:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 161 states have (on average 1.0807453416149069) internal successors, (174), 166 states have internal predecessors, (174), 27 states have call successors, (27), 20 states have call predecessors, (27), 24 states have return successors, (37), 26 states have call predecessors, (37), 26 states have call successors, (37) [2022-11-20 11:11:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 238 transitions. [2022-11-20 11:11:02,329 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 238 transitions. Word has length 122 [2022-11-20 11:11:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:02,330 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 238 transitions. [2022-11-20 11:11:02,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 3.020408163265306) internal successors, (148), 45 states have internal predecessors, (148), 15 states have call successors, (25), 13 states have call predecessors, (25), 14 states have return successors, (23), 15 states have call predecessors, (23), 14 states have call successors, (23) [2022-11-20 11:11:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 238 transitions. [2022-11-20 11:11:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 11:11:02,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:02,332 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:02,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:02,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 11:11:02,539 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:02,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash -647815717, now seen corresponding path program 1 times [2022-11-20 11:11:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:02,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104207254] [2022-11-20 11:11:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:11:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:11:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:11:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:11:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:03,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:11:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:04,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:11:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:04,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:11:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:04,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:11:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:04,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:11:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:04,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:11:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:04,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:11:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:04,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-20 11:11:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 11:11:04,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:04,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104207254] [2022-11-20 11:11:04,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104207254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:04,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644980300] [2022-11-20 11:11:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:04,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:04,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:04,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:04,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:11:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:05,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 11:11:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:06,092 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-20 11:11:06,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 1 [2022-11-20 11:11:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:11:06,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:06,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 11:11:06,551 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 11:11:06,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2022-11-20 11:11:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 11:11:06,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644980300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:06,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:11:06,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 25 [2022-11-20 11:11:06,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514173443] [2022-11-20 11:11:06,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:06,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:11:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:11:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:11:06,608 INFO L87 Difference]: Start difference. First operand 213 states and 238 transitions. Second operand has 25 states, 23 states have (on average 6.391304347826087) internal successors, (147), 21 states have internal predecessors, (147), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) [2022-11-20 11:11:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:09,114 INFO L93 Difference]: Finished difference Result 365 states and 417 transitions. [2022-11-20 11:11:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:11:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 6.391304347826087) internal successors, (147), 21 states have internal predecessors, (147), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) Word has length 124 [2022-11-20 11:11:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:09,117 INFO L225 Difference]: With dead ends: 365 [2022-11-20 11:11:09,117 INFO L226 Difference]: Without dead ends: 227 [2022-11-20 11:11:09,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 263 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:11:09,119 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 241 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:09,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 489 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1669 Invalid, 0 Unknown, 483 Unchecked, 1.6s Time] [2022-11-20 11:11:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-20 11:11:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 207. [2022-11-20 11:11:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 156 states have (on average 1.0769230769230769) internal successors, (168), 160 states have internal predecessors, (168), 27 states have call successors, (27), 20 states have call predecessors, (27), 23 states have return successors, (36), 26 states have call predecessors, (36), 26 states have call successors, (36) [2022-11-20 11:11:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 231 transitions. [2022-11-20 11:11:09,145 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 231 transitions. Word has length 124 [2022-11-20 11:11:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:09,145 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 231 transitions. [2022-11-20 11:11:09,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 6.391304347826087) internal successors, (147), 21 states have internal predecessors, (147), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) [2022-11-20 11:11:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 231 transitions. [2022-11-20 11:11:09,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 11:11:09,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:09,147 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:09,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:09,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:09,357 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:11:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1310759069, now seen corresponding path program 3 times [2022-11-20 11:11:09,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:09,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761499571] [2022-11-20 11:11:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:13,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:11:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:13,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:11:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:13,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:11:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:13,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:11:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:11:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:14,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:11:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:14,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:11:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:14,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:11:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:14,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:11:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:14,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:11:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:15,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:11:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:15,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-20 11:11:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 33 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 11:11:15,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:15,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761499571] [2022-11-20 11:11:15,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761499571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:15,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034249594] [2022-11-20 11:11:15,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:11:15,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:15,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:15,748 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:15,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:11:17,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:11:17,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:17,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 2698 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 11:11:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:17,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:11:17,402 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:11:17,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:11:17,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:11:19,534 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_50| Int)) (not (= |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_50| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_50|) 8)))) is different from true [2022-11-20 11:11:21,670 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_51| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_51|) 8) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_51|))) is different from true [2022-11-20 11:11:23,882 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_24| Int)) (not (= |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_24| (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_24|) 8)))) is different from true [2022-11-20 11:11:44,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:11:44,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2022-11-20 11:11:46,983 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1515 (Array Int Int))) (= (store |c_old(#memory_int)| |c_memset_impl_#in~s.base| v_ArrVal_1515) |c_#memory_int|)) is different from true [2022-11-20 11:11:46,996 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1515 (Array Int Int))) (= (store |c_old(#memory_int)| |c_my_memset_#in~s.base| v_ArrVal_1515) |c_#memory_int|)) is different from true [2022-11-20 11:11:47,012 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2022-11-20 11:11:47,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:47,119 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 23 [2022-11-20 11:11:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 31 refuted. 5 times theorem prover too weak. 6 trivial. 46 not checked. [2022-11-20 11:11:49,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:50,499 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1525 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_aws_byte_buf_secure_zero_aws_secure_zero_~pBuf#1.base| v_ArrVal_1525) |c_aws_byte_buf_secure_zero_~buf#1.base|) (+ 16 |c_aws_byte_buf_secure_zero_~buf#1.offset|)) 18446744073709551616) 0))) is different from false [2022-11-20 11:11:50,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034249594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:50,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:50,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 59 [2022-11-20 11:11:50,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352410621] [2022-11-20 11:11:50,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:50,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 11:11:50,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:50,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 11:11:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3084, Unknown=16, NotChecked=702, Total=4032 [2022-11-20 11:11:50,505 INFO L87 Difference]: Start difference. First operand 207 states and 231 transitions. Second operand has 59 states, 51 states have (on average 3.2745098039215685) internal successors, (167), 49 states have internal predecessors, (167), 19 states have call successors, (26), 14 states have call predecessors, (26), 16 states have return successors, (23), 16 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-20 11:13:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:57,078 INFO L93 Difference]: Finished difference Result 394 states and 446 transitions. [2022-11-20 11:13:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 11:13:57,079 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 51 states have (on average 3.2745098039215685) internal successors, (167), 49 states have internal predecessors, (167), 19 states have call successors, (26), 14 states have call predecessors, (26), 16 states have return successors, (23), 16 states have call predecessors, (23), 18 states have call successors, (23) Word has length 124 [2022-11-20 11:13:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:57,081 INFO L225 Difference]: With dead ends: 394 [2022-11-20 11:13:57,081 INFO L226 Difference]: Without dead ends: 293 [2022-11-20 11:13:57,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 135 SyntacticMatches, 12 SemanticMatches, 98 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2397 ImplicationChecksByTransitivity, 158.5s TimeCoverageRelationStatistics Valid=584, Invalid=8079, Unknown=103, NotChecked=1134, Total=9900 [2022-11-20 11:13:57,085 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 260 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 969 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:57,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 868 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1847 Invalid, 0 Unknown, 969 Unchecked, 1.8s Time] [2022-11-20 11:13:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-20 11:13:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 254. [2022-11-20 11:13:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 190 states have (on average 1.068421052631579) internal successors, (203), 195 states have internal predecessors, (203), 36 states have call successors, (36), 24 states have call predecessors, (36), 27 states have return successors, (49), 34 states have call predecessors, (49), 35 states have call successors, (49) [2022-11-20 11:13:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 288 transitions. [2022-11-20 11:13:57,124 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 288 transitions. Word has length 124 [2022-11-20 11:13:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:57,124 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 288 transitions. [2022-11-20 11:13:57,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 51 states have (on average 3.2745098039215685) internal successors, (167), 49 states have internal predecessors, (167), 19 states have call successors, (26), 14 states have call predecessors, (26), 16 states have return successors, (23), 16 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-20 11:13:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 288 transitions. [2022-11-20 11:13:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 11:13:57,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:57,126 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:57,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:57,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:57,348 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:57,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1512583003, now seen corresponding path program 2 times [2022-11-20 11:13:57,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:57,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709396152] [2022-11-20 11:13:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:57,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:13:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:58,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:13:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:13:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:58,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:13:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:58,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:13:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:59,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:13:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:59,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:13:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:59,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:13:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:59,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:13:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:59,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:13:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:59,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:13:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:59,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-20 11:13:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 11:13:59,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709396152] [2022-11-20 11:13:59,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709396152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454001730] [2022-11-20 11:13:59,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:13:59,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:59,432 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:59,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:14:00,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:00,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:00,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:14:00,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:14:01,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:01,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-20 11:14:01,501 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 11:14:01,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2022-11-20 11:14:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 11:14:01,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454001730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:01,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:01,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 25 [2022-11-20 11:14:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824918989] [2022-11-20 11:14:01,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:01,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:14:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:01,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:14:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:14:01,558 INFO L87 Difference]: Start difference. First operand 254 states and 288 transitions. Second operand has 25 states, 23 states have (on average 6.391304347826087) internal successors, (147), 21 states have internal predecessors, (147), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) [2022-11-20 11:14:03,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:03,832 INFO L93 Difference]: Finished difference Result 440 states and 499 transitions. [2022-11-20 11:14:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:14:03,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 6.391304347826087) internal successors, (147), 21 states have internal predecessors, (147), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) Word has length 124 [2022-11-20 11:14:03,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:03,835 INFO L225 Difference]: With dead ends: 440 [2022-11-20 11:14:03,835 INFO L226 Difference]: Without dead ends: 302 [2022-11-20 11:14:03,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 268 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=282, Invalid=1521, Unknown=3, NotChecked=0, Total=1806 [2022-11-20 11:14:03,836 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 249 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:03,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 396 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1121 Invalid, 0 Unknown, 395 Unchecked, 1.3s Time] [2022-11-20 11:14:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-20 11:14:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 276. [2022-11-20 11:14:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 212 states have (on average 1.0613207547169812) internal successors, (225), 215 states have internal predecessors, (225), 36 states have call successors, (36), 26 states have call predecessors, (36), 27 states have return successors, (46), 34 states have call predecessors, (46), 35 states have call successors, (46) [2022-11-20 11:14:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 307 transitions. [2022-11-20 11:14:03,871 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 307 transitions. Word has length 124 [2022-11-20 11:14:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:03,871 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 307 transitions. [2022-11-20 11:14:03,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 6.391304347826087) internal successors, (147), 21 states have internal predecessors, (147), 7 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (23), 5 states have call predecessors, (23), 7 states have call successors, (23) [2022-11-20 11:14:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 307 transitions. [2022-11-20 11:14:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-20 11:14:03,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:03,873 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:03,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:04,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 11:14:04,083 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1479735818, now seen corresponding path program 1 times [2022-11-20 11:14:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:04,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369062117] [2022-11-20 11:14:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:14:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:14:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:14:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-20 11:14:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:14:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:14:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 11:14:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 11:14:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-20 11:14:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:06,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 11:14:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:07,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:14:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:07,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:14:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:07,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:14:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 11:14:08,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:08,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369062117] [2022-11-20 11:14:08,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369062117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:08,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884721002] [2022-11-20 11:14:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:08,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:08,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:08,193 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:08,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:14:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:08,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-20 11:14:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:09,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:14:11,123 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_61| Int)) (<= (+ 2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_61|) 8)) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_61|)) is different from true [2022-11-20 11:14:13,274 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_62| Int)) (<= (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_62|) 8) 2) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_62|)) is different from true [2022-11-20 11:14:15,517 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_31| Int)) (<= (+ 2 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_31|) 8)) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_31|)) is different from true [2022-11-20 11:14:36,250 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_32| Int)) (and (not (= 0 (mod (select (select |c_#memory_int| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_32|) 16) 18446744073709551616))) (<= (+ 2 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_32|) 8)) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_32|))) is different from true [2022-11-20 11:14:36,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:14:36,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2022-11-20 11:14:37,084 WARN L859 $PredicateComparison]: unable to prove that (exists ((memset_impl_~sp~0.base Int)) (and (<= memset_impl_~sp~0.base |c_memset_impl_#in~s.base|) (exists ((v_ArrVal_1838 (Array Int Int))) (= (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1838) |c_#memory_int|)))) is different from true [2022-11-20 11:14:37,119 WARN L859 $PredicateComparison]: unable to prove that (exists ((memset_impl_~sp~0.base Int) (v_ArrVal_1838 (Array Int Int))) (and (<= memset_impl_~sp~0.base |c_my_memset_#in~s.base|) (= (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_1838) |c_#memory_int|))) is different from true [2022-11-20 11:14:37,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:37,146 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2022-11-20 11:14:37,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:37,182 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 28 [2022-11-20 11:14:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 14 refuted. 10 times theorem prover too weak. 14 trivial. 42 not checked. [2022-11-20 11:14:53,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:54,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884721002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:54,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:54,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2022-11-20 11:14:54,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603308338] [2022-11-20 11:14:54,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:54,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:14:54,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:14:54,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2576, Unknown=31, NotChecked=642, Total=3422 [2022-11-20 11:14:54,790 INFO L87 Difference]: Start difference. First operand 276 states and 307 transitions. Second operand has 55 states, 50 states have (on average 3.06) internal successors, (153), 46 states have internal predecessors, (153), 19 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2022-11-20 11:16:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:09,931 INFO L93 Difference]: Finished difference Result 429 states and 478 transitions. [2022-11-20 11:16:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 11:16:09,932 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 50 states have (on average 3.06) internal successors, (153), 46 states have internal predecessors, (153), 19 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) Word has length 129 [2022-11-20 11:16:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:09,934 INFO L225 Difference]: With dead ends: 429 [2022-11-20 11:16:09,935 INFO L226 Difference]: Without dead ends: 314 [2022-11-20 11:16:09,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 147 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 118.8s TimeCoverageRelationStatistics Valid=465, Invalid=6963, Unknown=78, NotChecked=1050, Total=8556 [2022-11-20 11:16:09,938 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 233 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 4368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2036 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:09,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1072 Invalid, 4368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2179 Invalid, 0 Unknown, 2036 Unchecked, 2.0s Time] [2022-11-20 11:16:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-20 11:16:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 286. [2022-11-20 11:16:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 219 states have (on average 1.0639269406392695) internal successors, (233), 222 states have internal predecessors, (233), 38 states have call successors, (38), 27 states have call predecessors, (38), 28 states have return successors, (49), 36 states have call predecessors, (49), 37 states have call successors, (49) [2022-11-20 11:16:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 320 transitions. [2022-11-20 11:16:09,986 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 320 transitions. Word has length 129 [2022-11-20 11:16:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:09,986 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 320 transitions. [2022-11-20 11:16:09,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 50 states have (on average 3.06) internal successors, (153), 46 states have internal predecessors, (153), 19 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2022-11-20 11:16:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 320 transitions. [2022-11-20 11:16:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-20 11:16:09,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:09,988 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:09,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:10,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:16:10,199 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:10,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:10,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1130151909, now seen corresponding path program 1 times [2022-11-20 11:16:10,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:10,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344455293] [2022-11-20 11:16:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:10,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:13,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:16:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:13,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:16:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:13,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:16:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:13,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:16:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:13,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:16:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:14,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:16:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:14,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:16:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:14,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:16:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:14,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:16:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:14,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:16:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:15,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:16:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:15,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-20 11:16:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 39 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-20 11:16:15,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344455293] [2022-11-20 11:16:15,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344455293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379974292] [2022-11-20 11:16:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:15,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:15,303 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:15,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:16:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-20 11:16:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:16,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:16:18,207 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_67| Int)) (<= (+ 2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_67|) 8)) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_67|)) is different from true [2022-11-20 11:16:20,354 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_68| Int)) (<= (+ (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_68|) 8) 2) |v_ULTIMATE.start_aws_byte_buf_secure_zero_harness_~#buf~3#1.base_BEFORE_CALL_68|)) is different from true [2022-11-20 11:16:22,549 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_36| Int)) (<= (+ (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_36|) 8) 2) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_36|)) is different from true [2022-11-20 11:16:31,180 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_37| Int)) (and (<= (+ 2 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_37|) 8)) |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_37|) (not (= (mod (select (select |c_#memory_int| |v_aws_byte_buf_secure_zero_~buf#1.base_BEFORE_CALL_37|) 16) 18446744073709551616) 0)))) is different from true [2022-11-20 11:16:31,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:16:31,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2022-11-20 11:16:32,065 WARN L859 $PredicateComparison]: unable to prove that (exists ((memset_impl_~sp~0.base Int)) (and (exists ((v_ArrVal_2040 (Array Int Int))) (= (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_2040) |c_#memory_int|)) (<= memset_impl_~sp~0.base |c_memset_impl_#in~s.base|))) is different from true [2022-11-20 11:16:32,104 WARN L859 $PredicateComparison]: unable to prove that (exists ((memset_impl_~sp~0.base Int) (v_ArrVal_2040 (Array Int Int))) (and (<= memset_impl_~sp~0.base |c_my_memset_#in~s.base|) (= (store |c_old(#memory_int)| memset_impl_~sp~0.base v_ArrVal_2040) |c_#memory_int|))) is different from true [2022-11-20 11:16:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:16:32,129 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2022-11-20 11:16:32,166 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 26 [2022-11-20 11:16:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 16 proven. 15 refuted. 10 times theorem prover too weak. 18 trivial. 44 not checked. [2022-11-20 11:16:36,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:39,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379974292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:39,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:39,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2022-11-20 11:16:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873092489] [2022-11-20 11:16:39,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:39,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:16:39,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:16:39,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2675, Unknown=18, NotChecked=654, Total=3540 [2022-11-20 11:16:39,633 INFO L87 Difference]: Start difference. First operand 286 states and 320 transitions. Second operand has 55 states, 50 states have (on average 3.26) internal successors, (163), 46 states have internal predecessors, (163), 20 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) [2022-11-20 11:18:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:08,375 INFO L93 Difference]: Finished difference Result 414 states and 454 transitions. [2022-11-20 11:18:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:18:08,376 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 50 states have (on average 3.26) internal successors, (163), 46 states have internal predecessors, (163), 20 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) Word has length 126 [2022-11-20 11:18:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:08,378 INFO L225 Difference]: With dead ends: 414 [2022-11-20 11:18:08,378 INFO L226 Difference]: Without dead ends: 299 [2022-11-20 11:18:08,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 110.6s TimeCoverageRelationStatistics Valid=503, Invalid=7092, Unknown=85, NotChecked=1062, Total=8742 [2022-11-20 11:18:08,380 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 180 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 3493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1551 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:08,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1131 Invalid, 3493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1865 Invalid, 0 Unknown, 1551 Unchecked, 1.6s Time] [2022-11-20 11:18:08,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-20 11:18:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 254. [2022-11-20 11:18:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 195 states have (on average 1.0564102564102564) internal successors, (206), 196 states have internal predecessors, (206), 34 states have call successors, (34), 26 states have call predecessors, (34), 24 states have return successors, (37), 31 states have call predecessors, (37), 33 states have call successors, (37) [2022-11-20 11:18:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 277 transitions. [2022-11-20 11:18:08,418 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 277 transitions. Word has length 126 [2022-11-20 11:18:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:08,418 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 277 transitions. [2022-11-20 11:18:08,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 50 states have (on average 3.26) internal successors, (163), 46 states have internal predecessors, (163), 20 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) [2022-11-20 11:18:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 277 transitions. [2022-11-20 11:18:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-20 11:18:08,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:08,420 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:08,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-20 11:18:08,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:18:08,630 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:08,630 INFO L85 PathProgramCache]: Analyzing trace with hash 574054087, now seen corresponding path program 1 times [2022-11-20 11:18:08,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:08,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269857303] [2022-11-20 11:18:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:08,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:18:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:18:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 11:18:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 11:18:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-20 11:18:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-20 11:18:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 11:18:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269857303] [2022-11-20 11:18:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269857303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351056544] [2022-11-20 11:18:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:10,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:10,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:10,923 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:10,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:18:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:18:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:11,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:18:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 67 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 11:18:16,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:17,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-11-20 11:18:17,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:18:17,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-11-20 11:18:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 11:18:17,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351056544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:17,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:17,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 12] total 32 [2022-11-20 11:18:17,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835559908] [2022-11-20 11:18:17,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:17,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:18:17,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:18:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=879, Unknown=2, NotChecked=0, Total=992 [2022-11-20 11:18:17,138 INFO L87 Difference]: Start difference. First operand 254 states and 277 transitions. Second operand has 32 states, 29 states have (on average 5.241379310344827) internal successors, (152), 27 states have internal predecessors, (152), 9 states have call successors, (31), 6 states have call predecessors, (31), 9 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2022-11-20 11:18:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:19,340 INFO L93 Difference]: Finished difference Result 312 states and 339 transitions. [2022-11-20 11:18:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:18:19,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 5.241379310344827) internal successors, (152), 27 states have internal predecessors, (152), 9 states have call successors, (31), 6 states have call predecessors, (31), 9 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 146 [2022-11-20 11:18:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:19,343 INFO L225 Difference]: With dead ends: 312 [2022-11-20 11:18:19,343 INFO L226 Difference]: Without dead ends: 260 [2022-11-20 11:18:19,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 307 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=350, Invalid=2000, Unknown=2, NotChecked=0, Total=2352 [2022-11-20 11:18:19,344 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 297 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:19,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 532 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1138 Invalid, 0 Unknown, 297 Unchecked, 1.1s Time] [2022-11-20 11:18:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-20 11:18:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 244. [2022-11-20 11:18:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 188 states have (on average 1.0425531914893618) internal successors, (196), 188 states have internal predecessors, (196), 33 states have call successors, (33), 25 states have call predecessors, (33), 22 states have return successors, (35), 30 states have call predecessors, (35), 32 states have call successors, (35) [2022-11-20 11:18:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2022-11-20 11:18:19,414 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 146 [2022-11-20 11:18:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:19,415 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2022-11-20 11:18:19,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 5.241379310344827) internal successors, (152), 27 states have internal predecessors, (152), 9 states have call successors, (31), 6 states have call predecessors, (31), 9 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2022-11-20 11:18:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2022-11-20 11:18:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-20 11:18:19,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:19,417 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:19,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:18:19,627 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2145915503, now seen corresponding path program 1 times [2022-11-20 11:18:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:19,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863949940] [2022-11-20 11:18:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:19,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:18:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:18:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 11:18:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 11:18:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-20 11:18:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-20 11:18:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-20 11:18:20,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:20,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863949940] [2022-11-20 11:18:20,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863949940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:20,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:20,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 11:18:20,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043512839] [2022-11-20 11:18:20,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:18:20,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:18:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:18:20,942 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand has 12 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-20 11:18:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:21,685 INFO L93 Difference]: Finished difference Result 274 states and 296 transitions. [2022-11-20 11:18:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:18:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 146 [2022-11-20 11:18:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:21,688 INFO L225 Difference]: With dead ends: 274 [2022-11-20 11:18:21,688 INFO L226 Difference]: Without dead ends: 244 [2022-11-20 11:18:21,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:18:21,689 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 135 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:21,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 179 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:18:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-20 11:18:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-11-20 11:18:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 188 states have (on average 1.0372340425531914) internal successors, (195), 188 states have internal predecessors, (195), 33 states have call successors, (33), 25 states have call predecessors, (33), 22 states have return successors, (35), 30 states have call predecessors, (35), 32 states have call successors, (35) [2022-11-20 11:18:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 263 transitions. [2022-11-20 11:18:21,730 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 263 transitions. Word has length 146 [2022-11-20 11:18:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:21,730 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 263 transitions. [2022-11-20 11:18:21,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-20 11:18:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 263 transitions. [2022-11-20 11:18:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-20 11:18:21,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:21,733 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:21,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-20 11:18:21,733 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:21,733 INFO L85 PathProgramCache]: Analyzing trace with hash -726335050, now seen corresponding path program 1 times [2022-11-20 11:18:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:21,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604568907] [2022-11-20 11:18:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:21,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:18:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:18:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 11:18:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 11:18:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-20 11:18:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-20 11:18:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-20 11:18:22,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:22,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604568907] [2022-11-20 11:18:22,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604568907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:22,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:22,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 11:18:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199049647] [2022-11-20 11:18:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:22,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:18:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:18:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:18:22,497 INFO L87 Difference]: Start difference. First operand 244 states and 263 transitions. Second operand has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-20 11:18:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:23,327 INFO L93 Difference]: Finished difference Result 252 states and 271 transitions. [2022-11-20 11:18:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:18:23,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 148 [2022-11-20 11:18:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:23,329 INFO L225 Difference]: With dead ends: 252 [2022-11-20 11:18:23,329 INFO L226 Difference]: Without dead ends: 250 [2022-11-20 11:18:23,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:18:23,330 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 130 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:23,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 334 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:18:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-20 11:18:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-11-20 11:18:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 191 states have (on average 1.036649214659686) internal successors, (198), 191 states have internal predecessors, (198), 34 states have call successors, (34), 26 states have call predecessors, (34), 23 states have return successors, (36), 31 states have call predecessors, (36), 33 states have call successors, (36) [2022-11-20 11:18:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 268 transitions. [2022-11-20 11:18:23,374 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 268 transitions. Word has length 148 [2022-11-20 11:18:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:23,374 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 268 transitions. [2022-11-20 11:18:23,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 8 states have internal predecessors, (63), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-20 11:18:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 268 transitions. [2022-11-20 11:18:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-20 11:18:23,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:23,376 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:23,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 11:18:23,376 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash 139366821, now seen corresponding path program 1 times [2022-11-20 11:18:23,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:23,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751667326] [2022-11-20 11:18:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:23,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:18:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-20 11:18:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:18:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 11:18:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:18:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:18:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 11:18:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 11:18:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-20 11:18:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-20 11:18:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-20 11:18:24,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:24,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751667326] [2022-11-20 11:18:24,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751667326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:24,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:24,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 11:18:24,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535611793] [2022-11-20 11:18:24,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:24,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:18:24,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:18:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:18:24,483 INFO L87 Difference]: Start difference. First operand 249 states and 268 transitions. Second operand has 12 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 6 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-20 11:18:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:25,277 INFO L93 Difference]: Finished difference Result 273 states and 293 transitions. [2022-11-20 11:18:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:18:25,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 6 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 153 [2022-11-20 11:18:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:25,279 INFO L225 Difference]: With dead ends: 273 [2022-11-20 11:18:25,279 INFO L226 Difference]: Without dead ends: 242 [2022-11-20 11:18:25,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:18:25,280 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 134 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:25,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 170 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:18:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-20 11:18:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 231. [2022-11-20 11:18:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 175 states have (on average 1.0342857142857143) internal successors, (181), 175 states have internal predecessors, (181), 33 states have call successors, (33), 25 states have call predecessors, (33), 22 states have return successors, (34), 30 states have call predecessors, (34), 32 states have call successors, (34) [2022-11-20 11:18:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 248 transitions. [2022-11-20 11:18:25,323 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 248 transitions. Word has length 153 [2022-11-20 11:18:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:25,324 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 248 transitions. [2022-11-20 11:18:25,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 6 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-20 11:18:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 248 transitions. [2022-11-20 11:18:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-20 11:18:25,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:25,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:25,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 11:18:25,327 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:25,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:25,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1959061304, now seen corresponding path program 1 times [2022-11-20 11:18:25,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:25,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414132246] [2022-11-20 11:18:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:25,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:18:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-20 11:18:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:18:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 11:18:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:18:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:18:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 11:18:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 11:18:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-20 11:18:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-20 11:18:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-20 11:18:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-20 11:18:26,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414132246] [2022-11-20 11:18:26,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414132246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:26,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:26,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:18:26,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37011855] [2022-11-20 11:18:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:26,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:18:26,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:18:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:18:26,685 INFO L87 Difference]: Start difference. First operand 231 states and 248 transitions. Second operand has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-20 11:18:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:27,417 INFO L93 Difference]: Finished difference Result 237 states and 253 transitions. [2022-11-20 11:18:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:18:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 162 [2022-11-20 11:18:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:27,419 INFO L225 Difference]: With dead ends: 237 [2022-11-20 11:18:27,419 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 11:18:27,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:18:27,420 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 106 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:27,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 194 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:18:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 11:18:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-20 11:18:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 171 states have (on average 1.023391812865497) internal successors, (175), 170 states have internal predecessors, (175), 32 states have call successors, (32), 25 states have call predecessors, (32), 21 states have return successors, (33), 29 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-20 11:18:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 240 transitions. [2022-11-20 11:18:27,459 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 240 transitions. Word has length 162 [2022-11-20 11:18:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:27,459 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 240 transitions. [2022-11-20 11:18:27,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 6 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-20 11:18:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 240 transitions. [2022-11-20 11:18:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-20 11:18:27,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:27,461 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:27,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-20 11:18:27,462 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:27,462 INFO L85 PathProgramCache]: Analyzing trace with hash 521581484, now seen corresponding path program 1 times [2022-11-20 11:18:27,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:27,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663795498] [2022-11-20 11:18:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:27,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:18:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:36,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:36,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:18:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:36,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 11:18:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:37,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:38,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:38,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 11:18:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:38,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-20 11:18:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-20 11:18:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:38,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-20 11:18:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:38,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-20 11:18:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:38,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-11-20 11:18:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-20 11:18:38,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:38,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663795498] [2022-11-20 11:18:38,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663795498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295735793] [2022-11-20 11:18:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:38,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:38,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:38,985 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:38,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:18:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 2783 conjuncts, 226 conjunts are in the unsatisfiable core [2022-11-20 11:18:39,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:39,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:18:40,418 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:18:40,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:18:40,544 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:18:40,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:18:40,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:18:45,150 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 11:18:45,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 153 treesize of output 185 [2022-11-20 11:18:45,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 130 [2022-11-20 11:18:45,226 INFO L321 Elim1Store]: treesize reduction 50, result has 46.2 percent of original size [2022-11-20 11:18:45,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 193 [2022-11-20 11:18:45,293 INFO L321 Elim1Store]: treesize reduction 84, result has 35.9 percent of original size [2022-11-20 11:18:45,293 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 72 treesize of output 60 [2022-11-20 11:18:45,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 59 [2022-11-20 11:18:45,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 11:18:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:18:45,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2022-11-20 11:18:45,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 42 [2022-11-20 11:18:45,629 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-20 11:18:45,629 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 313 treesize of output 245 [2022-11-20 11:18:45,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 184 [2022-11-20 11:18:45,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-20 11:18:45,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-20 11:18:49,606 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 11:18:49,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 153 treesize of output 185 [2022-11-20 11:18:49,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 130 [2022-11-20 11:18:49,672 INFO L321 Elim1Store]: treesize reduction 50, result has 46.2 percent of original size [2022-11-20 11:18:49,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 193 [2022-11-20 11:18:49,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 68 [2022-11-20 11:18:49,749 INFO L321 Elim1Store]: treesize reduction 92, result has 35.7 percent of original size [2022-11-20 11:18:49,749 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 76 treesize of output 64 [2022-11-20 11:18:49,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:18:49,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2022-11-20 11:18:49,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:18:49,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2022-11-20 11:18:49,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:18:49,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 22 [2022-11-20 11:18:49,927 INFO L350 Elim1Store]: Elim1 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 134 treesize of output 94 [2022-11-20 11:18:49,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 71 [2022-11-20 11:18:50,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:18:50,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2022-11-20 11:18:50,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:18:50,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 46 [2022-11-20 11:18:51,836 INFO L321 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2022-11-20 11:18:51,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 161 treesize of output 183 [2022-11-20 11:18:51,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:18:51,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:18:51,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 133 [2022-11-20 11:18:51,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:18:51,858 INFO L350 Elim1Store]: Elim1 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 91 treesize of output 84 [2022-11-20 11:18:51,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:18:51,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:18:51,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 45 [2022-11-20 11:18:51,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:18:51,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:18:51,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-20 11:18:51,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 22 [2022-11-20 11:18:54,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-20 11:18:54,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 26 treesize of output 14 [2022-11-20 11:18:56,542 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-20 11:18:56,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 40 [2022-11-20 11:18:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 82 proven. 83 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:18:56,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:02,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295735793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:02,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:02,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 51] total 74 [2022-11-20 11:19:02,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142920535] [2022-11-20 11:19:02,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:02,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-20 11:19:02,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-20 11:19:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=5896, Unknown=1, NotChecked=0, Total=6162 [2022-11-20 11:19:02,198 INFO L87 Difference]: Start difference. First operand 225 states and 240 transitions. Second operand has 74 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 26 states have call successors, (37), 11 states have call predecessors, (37), 20 states have return successors, (36), 25 states have call predecessors, (36), 25 states have call successors, (36) [2022-11-20 11:19:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:13,076 INFO L93 Difference]: Finished difference Result 333 states and 354 transitions. [2022-11-20 11:19:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 11:19:13,076 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 26 states have call successors, (37), 11 states have call predecessors, (37), 20 states have return successors, (36), 25 states have call predecessors, (36), 25 states have call successors, (36) Word has length 166 [2022-11-20 11:19:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:13,078 INFO L225 Difference]: With dead ends: 333 [2022-11-20 11:19:13,078 INFO L226 Difference]: Without dead ends: 241 [2022-11-20 11:19:13,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 147 SyntacticMatches, 15 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3456 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=615, Invalid=12955, Unknown=2, NotChecked=0, Total=13572 [2022-11-20 11:19:13,081 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 149 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2281 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:13,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1682 Invalid, 4416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2009 Invalid, 0 Unknown, 2281 Unchecked, 2.2s Time] [2022-11-20 11:19:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-20 11:19:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2022-11-20 11:19:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 184 states have internal predecessors, (187), 32 states have call successors, (32), 25 states have call predecessors, (32), 23 states have return successors, (33), 29 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-20 11:19:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 252 transitions. [2022-11-20 11:19:13,121 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 252 transitions. Word has length 166 [2022-11-20 11:19:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:13,122 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 252 transitions. [2022-11-20 11:19:13,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 26 states have call successors, (37), 11 states have call predecessors, (37), 20 states have return successors, (36), 25 states have call predecessors, (36), 25 states have call successors, (36) [2022-11-20 11:19:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 252 transitions. [2022-11-20 11:19:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-20 11:19:13,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:13,124 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:13,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:13,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1132a10-b1eb-46a3-9831-55237a83b36b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:13,324 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1434454958, now seen corresponding path program 2 times [2022-11-20 11:19:13,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:13,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490247475] [2022-11-20 11:19:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:13,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat